SECTION 03 3100 CONCRETE PART 1 - eidsoninc.com 03 - Concrete.pdf · Comply with ACI 315 "Manual of Standard Practice for Detailing Reinforced ... Vapor retarder/barrier. ... Coordinate

A NEW ADMINISTRATIVE OFFICE & STATIONHOUSE FOR CITY OF CULLMAN FIRE & RESCUE CITY OF CULLMAN CULLMAN, ALABAMA

GOODWYN, MILLS & CAWOOD, INC. CONCRETE GM&C PROJECT NO. ABHM150026 03 3100 - 1 of 22

SECTION 03 3100

CONCRETE PART 1 - GENERAL 1.1 SUMMARY:

A. Section Includes:

1. Formwork. 2. Reinforcing. 3. Cast-in place concrete including mix design, placement procedures, and finishes.

B. Cast-in-place concrete includes the following:

1. Foundations and footings. 2. Slabs-on-grade. 3. Slabs on steel deck. 4. Equipment pads and bases.

C. Related Documents: Drawings and general provisions of Contract, including General and

Supplementary Conditions and Division 1 Specification Sections, apply to this Section.

D. Related Sections: The following Sections contain requirements that relate to this Section:

1. Section 02 2000, "Earthwork": Drainage fill under slabs on grade. 2. Section 02 5140, "Portland Cement Concrete Paving": Concrete paving and walks. 3. Section 03 3500, “Concrete Toppings” 4. Section 03 4100, “Structural Precast Concrete” 5. Section 04 2000, "Unit Masonry": Concrete fill for masonry lintels. 6. Section 05 5000, "Metal Fabrications": Metal items to be built into concrete. 7. Section 07 9000, "Sealants and Joint Fillers": Sealants and joint fillers in concrete

work. 8. Section 09 6260, “Resilient Athletic Flooring” 9. Respective Sections of Division 15 and 16, as applicable, for furnishing of inserts,

anchorage and erection items required for mechanical and electrical work.. 10. Divisions 15 and 16, as applicable, for furnishing and setting of conduit, pipes and

sleeves for mechanical and electrical equipment. 1.2 SUBMITTALS:

A. General: Submit the following according to Conditions of the Contract and Division 1 Specification Sections.

B. Product data for proprietary materials and items, including reinforcement and forming

accessories, admixtures, patching compounds, waterstops, joint systems, curing compounds, dry-shake finish materials, and others if requested by Architect.



C. Shop drawings for reinforcement detailing fabricating, bending, and placing concrete reinforcement. Comply with ACI 315 "Manual of Standard Practice for Detailing Reinforced Concrete Structures" showing bar schedules, stirrup spacing, bent bar diagrams, and arrangement of concrete reinforcement. Include special reinforcing required for openings through concrete structures.

D. Samples of materials as requested by Architect, including names, sources, and descriptions, as

follows:

1. Color finishes. 2. Normal weight aggregates. 3. Reglets. 4. Waterstops. 5. Vapor retarder/barrier.

E. Laboratory test reports for concrete materials and mix design test.

F. Minutes of pre-installation conference.

1.3 QUALITY ASSURANCE:

A. Codes and Standards: Comply with provisions of the following codes, specifications, and standards, except where more stringent requirements are shown or specified:

1. ACI 301, "Specifications for Structural Concrete for Buildings". 2. ACI 302, "Guide for Concrete Floor and Slab Construction". 3. ACI 304, "Recommended Practice for Measuring, Mixing, Transporting and Placing

Concrete". 4. ACI 305, "Hot Weather Concreting". 5. ACI 306, "Cold Weather Concreting". 6. ACI 309, "Guide for Consolidation of Concrete". 7. ACI 311, "Recommended Practice for Concrete Inspection". 8. ACI 318, "Building Code Requirements for Reinforced Concrete". 9. ACI 347, "Recommended Practice for Concrete Formwork". 10. Concrete Reinforcing Steel Institute (CRSI), "Manual of Standard Practice." 11. American Welding Society, AWS D1.4 "Structural Welding Code - Reinforcing Steel".

B. Concrete Testing Service: Engage a testing agency acceptable to Architect to perform material

evaluation tests and to design concrete mixes.

C. Materials and installed work may require testing and retesting at any time during progress of Work. Tests, including retesting of rejected materials for installed Work, shall be done at Contractor's expense.

D. Preinstallation Conference: Conduct conference at Project site to comply with requirements of

Division 1 Section "Project Meetings" and the following:

1. At least 35 days prior to submitting design mixes, conduct a meeting to review detailed requirements for preparing concrete design mixes and to determine procedures for



satisfactory concrete operations. Review requirements for submittals, status of coordinating work, and availability of materials. Establish preliminary work progress schedule and procedures for materials inspection, testing, and certifications. Require representatives of each entity directly concerned with cast-in-place concrete to attend conference, including, but not limited to, the following:

a. Contractor's superintendent. b. Agency responsible for concrete design mixes. c. Agency responsible for field quality control. d. Ready-mix concrete producer. e. Concrete subcontractor. f. Primary admixture manufacturers.

PART 2 - PRODUCTS 2.1 FORM MATERIALS:

A. Forms for Exposed Finish Concrete: Plywood, metal, metal-framed plywood faced, or other acceptable panel-type materials to provide continuous, straight, smooth, exposed surfaces. Furnish in largest practicable sizes to minimize number of joints and to conform to joint system shown on drawings.

1. Use overlaid plywood complying with U.S. Product Standard PS-1 "A-C or B-B High

Density Overlaid Concrete Form," Class I.

2. Use plywood complying with U.S. Product Standard PS-1 "B-B (Concrete Form) Plywood," Class I, Exterior Grade or better, mill-oiled and edge-sealed, with each piece bearing legible inspection trademark.

B. Forms for Unexposed Finish Concrete: Plywood, lumber, metal, or another acceptable material.

Provide lumber dressed on at least two edges and one side for tight fit.

C. Form Liner: Pattern 16020 Rough Sawn Plank, Rough Grain Plank, horizontal orientation by Fitzgerald Formliners, or equal – Concrete walls at monumental stair. Coordinate location with architectural drawings.

D. Form Release Agent: Provide commercial formulation form release agent with a maximum of

350 g/L volatile organic compounds (VOCs) that will not bond with, stain, or adversely affect concrete surfaces and will not impair subsequent treatments of concrete surfaces.

E. Form Ties: Factory-fabricated, adjustable-length, removable or snap-off metal form ties

designed to prevent form deflection and to prevent spalling of concrete upon removal. Provide units that will leave no metal closer than 1-1/2 inches to the plane of the exposed concrete surface.

F. Provide ties that, when removed, will leave holes not larger than 1 inch in diameter in the

concrete surface. 2.2 REINFORCING MATERIALS:



A. Reinforcing Bars: ASTM A 615, Grade 60, deformed.

B. Steel Wire: ASTM A 82, plain, cold-drawn steel.

C. Welded Wire Fabric: ASTM A 185, welded steel wire fabric.

D. Deformed-Steel Welded Wire Fabric: ASTM A 497.

E. Supports for Reinforcement: Bolsters, chairs, spacers, and other devices for spacing,

supporting, and fastening reinforcing bars and welded wire fabric in place. Use wire bar-type supports complying with CRSI specifications.

1. For slabs-on-grade, use supports with sand plates or horizontal runners where base

material will not support chair legs. 2. For exposed-to-view concrete surfaces where legs of supports are in contact with forms,

provide supports with legs that are protected by plastic (CRSI, Class 1) or stainless steel (CRSI, Class 2).

F. Threaded Dowels: Continuous threaded high-strength steel bars equal to "Lasstud" by

Richmond Screw Anchor Co., Inc. Provide inserts compatible with dowels, designed for ultimate pull-out force indicated on the drawings.

G. Mechanical Splices: Equal to "Cadweld Rebar Splices", as manufactured by Erico Products,

Inc., "C" Series, for developing 125% of minimum ASTM specified yield strengths, unless otherwise noted on drawings.

H. Steel Shapes, Plates and Rods: Conform to ASTM A 36, "Specification for Structural Steel".

I. Do Not Weld Reinforcing Steel: Unless specifically noted on drawings. If welding is shown,

conform to latest revision of AWS D12.1, "Reinforcing Steel Welding Code of the American Welding Society". Perform all welding with certified welders qualified per AWS.

2.3 CONCRETE MATERIALS:

A. Portland Cement: ASTM C 150, Type I.

1. Use one brand of cement throughout Project unless otherwise acceptable to Architect.

B. Fly Ash: ASTM C 618, Type F or C.

1. Limit use of fly ash to not exceed 20 percent of cement content by weight.

C. Normal-Weight Aggregates: ASTM C 33 and as specified. Provide aggregates from a single source for exposed concrete.

1. For exposed exterior surfaces, do not use fine or coarse aggregates that contain

substances that cause spalling. 2. Local aggregates not complying with ASTM C 33 that have been shown to produce



concrete of adequate strength and durability by special tests or actual service may be used when acceptable to Architect.

D. Water: Potable.

E. Admixtures, General: Provide concrete admixtures that contain not more than 0.1 percent

chloride ions.

F. Air-Entraining Admixture: ASTM C 260, certified by manufacturer to be compatible with other required admixtures.

1. Products: Subject to compliance with requirements, provide one of the following:

a. Air-Tite, Cormix Construction Chemicals. b. Air-Mix or Perma-Air, Euclid Chemical Co. c. Darex AEA or Daravair, W.R. Grace & Co. d. MB-VR or Micro-Air, Master Builders, Inc. e. Sealtight AEA, W.R. Meadows, Inc. f. Sika AER, Sika Corp.

G. Water-Reducing Admixture: ASTM C 494, Type A.


a. PSI N, Cormix Construction Chemicals. b. Eucon WR-75, Euclid Chemical Co. c. WRDA, W.R. Grace & Co. d. Pozzolith Normal or Polyheed, Master Builders, Inc. e. Plastocrete 161, Sika Corp.

H. High-Range Water-Reducing Admixture: ASTM C 494, Type F or Type G.


a. Eucon 37, Euclid Chemical Co. b. WRDA 19 or Daracem, W.R. Grace & Co. c. Rheobuild or Polyheed, Master Builders, Inc. d. Sikament 300, Sika Corp.

I. Water-Reducing, Accelerating Admixture: ASTM C 494, Type E.


a. Accelguard 80, Euclid Chemical Co. b. Daraset, W.R. Grace & Co. c. Pozzutec 20, Master Builders, Inc.

J. Water-Reducing, Retarding Admixture: ASTM C 494, Type D.


a. Eucon Retarder 75, Euclid Chemical Co. b. Daratard-17, W.R. Grace & Co. c. Pozzolith R, Master Builders, Inc.



d. Protard, Prokrete Industries. e. Plastiment, Sika Corporation.

2.4 RELATED MATERIALS:

A. Reglets: Where sheet flashing or bituminous membranes are terminated in reglets, provide reglets of not less than 0.0217-inch-thick (26-gage) galvanized sheet steel. Fill reglet or cover face opening to prevent intrusion of concrete or debris.

B. Vapor Barrier:

1. Vapor Barrier, General Use (except as indicated below):

a. Product: Plastic vapor barrier. Include manufacturer’s recommended adhesive

or pressure-sensitive tape for sealing joints, laps and penetrations, preformed boots for penetrations, and all other components required for a complete, proper and vaporproof installation in accordance with ASTM E1643.

1) Classification: Must exceed ASTM E 1745 Class “A”. 2) Permeance: ASTM E96: 0.02 perms or less. 3) Thickness: Not less than 15 mils.

b. Manufacturer/Product: 1) “Moistop Ultra 15 mil”, Fortifiber Building Systems Group. 2) “Perminator 15 mil”, W.R. Meadows 3) “Griffolyn Type-105”, Reef Industries, Inc. 4) “Stego Wrap 15 mil”, Stego Industries, LLC. 5) “VaporBlock VB15”, Raven Inc. 6) “Husky Yellow Guard 15 mil”, Poly-America, L.P.

c. “Locations for Use: Continuous below all new and opened building slabs, and other structural slabs, porches, stoops, pads, covered (below roofs) areas, etc., on grade, and turned-down to tops of footings.

C. Nonslip Aggregate Finish: Provide fused aluminum oxide granules or crushed emery as the

abrasive aggregate for a nonslip finish, with emery aggregate containing not less than 50 percent aluminum oxide and not less than 25 percent ferric oxide. Use material that is factory-graded, packaged, rustproof, nonglazing, and unaffected by freezing, moisture, and cleaning materials.

D. Colored Wear-Resistant Finish: Packaged dry combination of materials consisting of portland

cement, graded quartz aggregate, coloring pigments, and plasticizing admixture. Use coloring pigments that are finely ground nonfading mineral oxides interground with cement. Color as selected by Architect from manufacturers' standards, unless otherwise indicated.


a. Quartz Tuff, Dayton-Superior. b. Surflex, Euclid Chemical Co. c. Colorundum, A.C. Horn, Inc. d. Quartz Plate, L&M Construction Chemicals, Inc. e. Colorcron, Master Builders, Inc. f. Lithochrome Color Hardener, L.M. Scofield Co.



g. Harcol Redi-Mix, Sonneborn-Chemrex. h. Hard Top, Symons Corp.

E. Absorptive Cover: Burlap cloth made from jute or kenaf, weighing approximately 9 oz. per sq. yd., complying with AASHTO M 182, Class 2.

F. Moisture-Retaining Cover: One of the following, complying with ASTM C 171.

1. Waterproof paper. 2. Polyethylene film. 3. Polyethylene-coated burlap.

G. Liquid Membrane-Forming Curing Compound: Liquid-type membrane-forming curing

compound complying with ASTM C 309, Type I, Class A. Moisture loss not more than 0.55 kg/sq. meter when applied at 200 sq. ft./gal.


a. Spartan-Cote, The Burke Co. b. Day-Chem Cure and Seal, Dayton Superior Corp. c. Eucocure, Euclid Chemical Co. d. Horn Clear Seal, A.C. Horn, Inc. e. L&M Cure R, L&M Construction Chemicals, Inc. f. Masterkure, Master Builders, Inc. g. CS-309, W.R. Meadows, Inc. h. Kure-N-Seal, Sonneborn-Chemrex.

H. Water-Based Acrylic Membrane Curing Compound: ASTM C 309, Type I, Class B.

1. Provide material that has a maximum volatile organic compound (VOC) rating of 350

g/L. 2. Products: Subject to compliance with requirements, provide one of the following:

a. Sealco - VOC, Cormix Construction Chemicals. b. Safe Cure and Seal, Dayton Superior Corp. c. Aqua-Cure, Euclid Chemical Co. d. Dress & Seal WB, L&M Construction Chemicals, Inc. e. Masterkure 100W, Master Builders, Inc. f. Vocomp-20, W.R. Meadows, Inc.

I. V.O.C. Compliant Acrylic Curing and Sealing Type (30 Percent): Liquid type membrane-

forming curing compound complying with ASTM C 309, Type 1, Class A and B. Provide 30 percent solids minimum, for surfaces indicated to be sealed.

J. Safe Cure and Seal: 30 percent (J-19), Dayton Superior Inc.

K. Evaporation Control:

1. Monomolecular film-forming compound applied to exposed concrete slab surfaces for

temporary protection from rapid moisture loss.



a. Products: Subject to compliance with requirements, provide one of the following: 1. Eucobar, Euclid Chemical Co. 2. E-Con, L&M Construction Chemicals, Inc. 3. Confilm, Master Builders, Inc.

L. V.O.C. Compliant Evaporation Control: Sure Film (J-74), Dayton Superior Inc.

M. Underlayment Compound: Free-flowing, self-leveling, pumpable, cement-based compound for

applications from 1 inch thick to feathered edges.

1. Products: Subject to compliance with requirements, provide one of the following: a. K-15, Ardex, Inc. b. LevelLayer II, Dayton Superior Corp. c. Flo-Top, Euclid Chemical Co. d. Gyp-Crete, Gyp-Crete Corp. e. Levelex, L&M Construction Chemicals, Inc. f. Underlayment 110, Master Builders, Inc. g. Thoro Underlayment Self-Leveling, Thoro System Products.

N. Bonding Agent: Polyvinyl acetate or acrylic base.


a. Polyvinyl Acetate (Interior Only):

1. Superior Concrete Bonder, Dayton Superior Corp. 2. Euco Weld, Euclid Chemical Co. 3. Weld-Crete, Larsen Products Corp. 4. Everweld, L&M Construction Chemicals, Inc. 5. Ready Bond, Symons Corp.

b. Acrylic or Styrene Butadiene: 1. Acrylic Bondcrete, The Burke Co. 2. Day-Chem Ad Bond, Dayton Superior Corp. 3. SBR Latex, Euclid Chemical Co. 4. Daraweld C, W.R. Grace & Co. 5. Hornweld, A.C. Horn, Inc. 6. Everbond, L&M Construction Chemicals, Inc. 7. Acryl-Set, Master Builders Inc. 8. Intralok, W.R. Meadows, Inc. 9. Sonocrete, Sonneborn-Chemrex.

O. Epoxy Adhesive: ASTM C 881, two-component material suitable for use on dry or damp

surfaces. Provide material type, grade, and class to suit Project requirements.

1. Products: Subject to compliance with requirements, provide one of the following: a. Resi-Bond (J-58), Dayton Superior. b. Euco Epoxy System #452 or #620, Euclid Chemical Co. c. Epoxtite Binder 2390, A.C. Horn, Inc. d. Epabond, L&M Construction Chemicals, Inc.



e. Concresive Standard Liquid, Master Builders, Inc. f. Rezi-Weld 1000, W.R. Meadows, Inc. g. Sikadur 32 Hi-Mod, Sika Corp.

P. Interior Epoxy Sealer: Use a maximum 35 percent type.

1. Products: Subject to compliance with requirements, provide one of the following: a. Epoxy-Plus; Dayton Superior Inc. b. Eucopoxy 1; Euclid Chemical c. Oauerseal 30E; Non-Crete, Inc. d. Rescon R117; Symons Corp. e. Son-No-Mar; Sonneborn, Div./Chem Rex Inc. f. Super Seal 35; L & M Const. Chem. Co.

Q. V.O.C. Compliant Urethane Sealer:

1. Day Chem Urethane V.O.C. (J-39); Dayton Superior Inc.

2.5 PROPORTIONING AND DESIGNING MIXES:

A. Prepare design mixes for each type and strength of concrete by either laboratory trial mixtures or field experience methods as specified in ACI 318-89 Section 5.3. If trial mixtures method used, use an independent testing facility acceptable to Architect for preparing and reporting proposed mix designs. The testing facility shall not be the same as used for field quality control testing, unless otherwise acceptable to Architect.

B. Trial mix designs and strength tests, made by qualified independent material laboratory, in

accordance with ACI 318-89 Section 5.3 are required for the following types of concrete:

1. Normal weight concrete with specified strength in excess of 4000 psi. 2. All concrete designs for which a suitable experience record is not available.

C. Mix design based on a record of past performance in accordance with ACI 318-89 Section 5.3, may be provided by qualified concrete supplier or precast concrete manufacturer for concrete designs. Mix design shall be certified by an independent testing laboratory.

D. All concrete mix designs shall include the following information:

1. Proportions of cement, fine and coarse aggregate and water. 2. Water/cement ratio, design strength, slump and air content. 3. Type of cement and aggregates. 4. Type and dosage of all admixtures. 5. Type, color and dosage of integral coloring compounds, where applicable. 6. Special requirements for pumping. 7. Any special characteristics of the mix which require precautions in the mixing, placing

or finishing techniques to achieve the finished product specified.



E. Submit written reports to Architect of each proposed mix for each class of concrete at least 15 days prior to start of Work. Do not begin concrete production until proposed mix designs have been reviewed by Architect.

F. Concrete for exposed slab on grade and slab on deck shall be a mix with 50% slag and 50%

gray cement. Samples shall be submitted to Architect for review with concrete mix design submittal.

G. Water-Cement Ratio: Provide concrete for following conditions with maximum water-cement

(W/C) ratios as follows:

1. Subjected to freezing and thawing: W/C 0.45. 2. Subjected to deicers/watertight: W/C 0.40. 3. Subjected to brackish water, salt spray, or deicers: W/C 0.40.

H. Slump Limits: Proportion and design mixes to result in concrete slump at point of placement as

follows:

1. Ramps and sloping surfaces: Not more than 3 inches. 2. Reinforced foundation systems: Not less than 1 inch and not more than 3 inches. 3. Concrete containing high-range water-reducing admixture (superplasticizer): Not more

than 8 inches after adding admixture to site-verified 2-to-3-inch slump concrete. 4. Other concrete: Not less than 3 inches and not more than 5 inches.

2.6 ADMIXTURES:

A. Use water-reducing admixture or high-range water-reducing admixture (superplasticizer) in concrete, as required, for placement and workability.

B. Use accelerating admixture in concrete slabs placed at ambient temperatures below 50 deg.F (10

deg.C).

C. Use high-range water-reducing admixture in pumped concrete, concrete for heavy-use industrial slabs, architectural concrete, parking structure slabs, concrete required to be watertight, and concrete with water-cement ratios below 0.50.

D. Use air-entraining admixture in exterior exposed concrete unless otherwise indicated. Add air-

entraining admixture at manufacturer's prescribed rate to result in concrete at point of placement having total air content with a tolerance of plus or minus 1-1/2 percent within the following limits:

1. Concrete structures and slabs exposed to freezing and thawing, deicer chemicals, or

hydraulic pressure: a. 4.5 percent (moderate exposure); 5.5 percent (severe exposure) for 1-1/2-inch

maximum aggregate. b. 4.5 percent (moderate exposure); 6.0 percent (severe exposure) for 1-inch

maximum aggregate. c. 5.0 percent (moderate exposure); 6.0 percent (severe exposure) for 3/4-inch

maximum aggregate.



d. 5.5 percent (moderate exposure); 7.0 percent (severe exposure) for 1/2-inch maximum aggregate.

2. Other concrete not exposed to freezing, thawing, or hydraulic pressure, or to receive a surface hardener: 2 to 4 percent air.

E. Use admixtures for water reduction and set accelerating or retarding in strict compliance with

manufacturer's directions. 2.7 CONCRETE MIXING

A. Ready-Mixed Concrete: Comply with requirements of ASTM C 94, and as specified.

1. When air temperature is between 85 deg.F (30 deg.C) and 90 deg.F (32 deg.C), reduce mixing and delivery time from 1-1/2 hours to 75 minutes, and when air temperature is above 90 deg.F (32 deg.C), reduce mixing and delivery time to 60 minutes.

PART 3 - EXECUTION 3.1 GENERAL:

A. Coordinate the installation of joint materials, vapor retarder/barrier, and other related materials with placement of forms and reinforcing steel.

3.2 FORMS:

A. General: Design, erect, support, brace, and maintain formwork to support vertical, lateral, static, and dynamic loads that might be applied until concrete structure can support such loads. Construct formwork so concrete members and structures are of correct size, shape, alignment, elevation, and position. Maintain formwork construction tolerances and surface irregularities complying with the following ACI 347 limits:

1. Provide Class A tolerances for concrete surfaces exposed to view. 2. Provide Class C tolerances for other concrete surfaces.

B. Construct forms to sizes, shapes, lines, and dimensions shown and to obtain accurate alignment,

location, grades, level, and plumb work in finished structures. Provide for openings, offsets, sinkages, keyways, recesses, moldings, rustications, reglets, chamfers, blocking, screeds, bulkheads, anchorages and inserts, and other features required in the Work. Use selected materials to obtain required finishes. Solidly butt joints and provide backup at joints to prevent cement paste from leaking.

C. Fabricate forms for easy removal without hammering or prying against concrete surfaces.

Provide crush plates or wrecking plates where stripping may damage cast concrete surfaces. Provide top forms for inclined surfaces where slope is too steep to place concrete with bottom forms only. Kerf wood inserts for forming keyways, reglets, recesses, and the like for easy removal.



D. Provide temporary openings for clean-outs and inspections where interior area of formwork is

inaccessible before and during concrete placement. Securely brace temporary openings and set tightly to forms to prevent losing concrete mortar. Locate temporary openings in forms at inconspicuous locations.

E. Chamfer exposed corners and edges as indicated, using wood, metal, PVC, or rubber chamfer

strips fabricated to produce uniform smooth lines and tight edge joints.

F. Provisions for Other Trades: Provide openings in concrete formwork to accommodate work of other trades. Determine size and location of openings, recesses, and chases from trades providing such items. Accurately place and securely support items built into forms.

G. Cleaning and Tightening: Thoroughly clean forms and adjacent surfaces to receive concrete.

Remove chips, wood, sawdust, dirt, or other debris just before placing concrete. Retighten forms and bracing before placing concrete, as required, to prevent mortar leaks and maintain proper alignment.

3.3 VAPOR RETARDER/BARRIER INSTALLATION:

A. General: Place vapor retarder/barrier sheeting in position with longest dimension parallel with direction of pour.

B. Lap vapor barrier over footings and/or seal to foundation walls.

C. Lap joints 6 inches and seal with manufacturer's recommended mastic or pressure-sensitive tape.

D. Seal all penetrations (including pipes) per manufacturer’s instructions. E. No penetration of the vapor barrier is allowed except for reinforcing steel and permanent

utilities. F. Repair damaged areas by cutting patches of vapor barrier, overlapping damaged area 6 inches

and taping all sides with tape. 3.4 PLACING REINFORCEMENT:

A. General: Comply with Concrete Reinforcing Steel Institute's recommended practice for "Placing Reinforcing Bars," for details and methods of reinforcement placement and supports and as specified.

1. Avoiding cutting or puncturing vapor retarder/barrier during reinforcement placement

and concreting operations. Repair damages before placing concrete.

B. Clean reinforcement of loose rust and mill scale, earth, ice, and other materials that reduce or destroy bond with concrete.

C. Accurately position, support, and secure reinforcement against displacement. Locate and



support reinforcing by metal chairs, runners, bolsters, spacers, and hangers, as approved by Architect.

D. Place reinforcement to maintain minimum coverages as indicated for concrete protection.

Arrange, space, and securely tie bars and bar supports to hold reinforcement in position during concrete placement operations. Set wire ties so ends are directed into concrete, not toward exposed concrete surfaces.

E. Install welded wire fabric in lengths as long as practicable. Lap adjoining pieces at least one

full mesh and lace splices with wire. Offset laps of adjoining widths to prevent continuous laps in either direction.

3.5 JOINTS:

A. Construction Joints: Locate and install construction joints so they do not impair strength or appearance of the structure, as acceptable to Architect.

B. Provide keyways at least 1-1/2 inches deep in construction joints in walls and slabs and between

walls and footings. Bulkheads designed and accepted for this purpose may be used for slabs.

C. Place construction joints perpendicular to main reinforcement. Continue reinforcement across construction joints except as indicated otherwise. Do not continue reinforcement through sides of strip placements.

D. Use bonding agent on existing concrete surfaces that will be joined with fresh concrete.

E. Isolation Joints in Slabs-on-Grade: Construct isolation joints in slabs-on-grade at points of

contact between slabs-on-grade and vertical surfaces, such as column pedestals, foundation walls, grade beams, and other locations, as indicated.

1. Joint fillers and sealants are specified in Section 07900, "Sealants and Joint Fillers".

F. Contraction (Control) Joints in Slabs-on-Grade: Construct contraction joints in slabs-on-grade

to form panels of patterns as shown. Use saw cuts 1/8 inch wide by one-fourth of slab depth or inserts 1/4 inch wide by one-fourth of slab depth, unless otherwise indicated.

1. Form contraction joints by inserting premolded plastic, hardboard, or fiberboard strip

into fresh concrete until top surface of strip is flush with slab surface. Tool slab edges round on each side of insert. After concrete has cured, remove inserts and clean groove of loose debris.

2. Contraction joints in unexposed floor slabs may be formed by saw cuts as soon as possible after slab finishing as may be safely done without dislodging aggregate.

3. If joint pattern is not shown, provide joints not exceeding 15 feet in either direction and located to conform to bay spacing wherever possible (at column centerlines, half bays, third bays).

4. Joint fillers and sealants are specified in Division 7 Section "Joint Sealants." 3.6 INSTALLING EMBEDDED ITEMS:



A. General: Set and build into formwork anchorage devices and other embedded items required for other work that is attached to or supported by cast-in-place concrete. Use setting drawings, diagrams, instructions, and directions provided by suppliers of items to be attached.

B. Install reglets to receive top edge of foundation sheet waterproofing and to receive through-wall

flashings in outer face of concrete frame at exterior walls, where flashing is shown at lintels, relieving angles, and other conditions.

C. Install dovetail anchor slots in concrete structures as indicated on drawings.

D. Forms for Slabs: Set edge forms, bulkheads, and intermediate screed strips for slabs to achieve

required elevations and contours in finished surfaces. Provide and secure units to support screed strips using strike-off templates or compacting-type screeds.

3.7 PREPARING FORM SURFACES:

A. General: Coat contact surfaces of forms with an approved, nonresidual, low-VOC, form-coating compound before placing reinforcement.

B. Do not allow excess form-coating material to accumulate in forms or come into contact with in-

place concrete surfaces against which fresh concrete will be placed. Apply according to manufacturer's instructions.

1. Coat steel forms with a nonstaining, rust-preventative material. Rust-stained steel

formwork is not acceptable. 3.8 CONCRETE PLACEMENT:

A. Inspection: Before placing concrete, inspect and complete formwork installation, reinforcing steel, and items to be embedded or cast in. Notify other trades to permit installation of their work.

B. General: Comply with ACI 304, "Guide for Measuring, Mixing, Transporting, and Placing

Concrete," and as specified.

C. Deposit concrete continuously or in layers of such thickness that no new concrete will be placed on concrete that has hardened sufficiently to cause seams or planes of weakness. If a section cannot be placed continuously, provide construction joints as specified. Deposit concrete to avoid segregation at its final location.

D. Placing Concrete in Forms: Deposit concrete in forms in horizontal layers no deeper than 24

inches and in a manner to avoid inclined construction joints. Where placement consists of several layers, place each layer while preceding layer is still plastic to avoid cold joints.

1. Consolidate placed concrete by mechanical vibrating equipment supplemented by hand-

spading, rodding, or tamping. Use equipment and procedures for consolidation of concrete complying with ACI 309.

2. Do not use vibrators to transport concrete inside forms. Insert and withdraw vibrators vertically at uniformly spaced locations no farther than the visible effectiveness of the



machine. Place vibrators to rapidly penetrate placed layer and at least 6 inches into preceding layer. Do not insert vibrators into lower layers of concrete that have begun to set. At each insertion, limit duration of vibration to time necessary to consolidate concrete and complete embedment of reinforcement and other embedded items without causing mix to segregate.

E. Placing Concrete Slabs: Deposit and consolidate concrete slabs in a continuous operation,

within limits of construction joints, until completing placement of a panel or section.

1. Consolidate concrete during placement operations so that concrete is thoroughly worked around reinforcement, other embedded items and into corners.

2. Bring slab surfaces to correct level with a straightedge and strike off. Use bull floats or darbies to smooth surface free of humps or hollows. Do not disturb slab surfaces prior to beginning finishing operations.

3. Maintain reinforcing in proper position on chairs during concrete placement.

F. Cold-Weather Placement: Comply with provisions of ACI 306 and as follows. Protect concrete work from physical damage or reduced strength that could be caused by frost, freezing actions, or low temperatures.

G. When air temperature has fallen to or is expected to fall below 40 deg.F (4 deg.C), uniformly

heat water and aggregates before mixing to obtain a concrete mixture temperature of not less than 50 deg.F (10 deg.C) and not more than 80 deg.F (27 deg.C) at point of placement.

1. Do not use frozen materials or materials containing ice or snow. Do not place concrete

on frozen subgrade or on subgrade containing frozen materials.

2. Do not use calcium chloride, salt, or other materials containing antifreeze agents or chemical accelerators unless otherwise accepted in mix designs.

H. Hot-Weather Placement: When hot weather conditions exist that would impair quality and

strength of concrete, place concrete complying with ACI 305 and as specified.

1. Cool ingredients before mixing to maintain concrete temperature at time of placement to below 90 deg.F (32 deg.C). Mixing water may be chilled or chopped ice may be used to control temperature, provided water equivalent of ice is calculated to total amount of mixing water. Using liquid nitrogen to cool concrete is Contractor's option.

2. Cover reinforcing steel with water-soaked burlap if it becomes too hot, so that steel temperature will not exceed the ambient air temperature immediately before embedding in concrete.

3. Fog spray forms, reinforcing steel, and subgrade just before placing concrete. Keep subgrade moisture uniform without puddles or dry areas.

4. Use water-reducing retarding admixture when required by high temperatures, low humidity, or other adverse placing conditions, as acceptable to Architect.

3.9 FINISHING FORMED SURFACES:

A. Rough-Formed Finish: Provide a rough-formed finish on formed concrete surfaces not exposed to view in the finished Work or concealed by other construction. This is the concrete surface



having texture imparted by form-facing material used, with tie holes and defective areas repaired and patched, and fins and other projections exceeding 1/4 inch in height rubbed down or chipped off.

B. Smooth-Formed Finish: Provide a smooth-formed finish on formed concrete surfaces exposed

to view or to be covered with a coating material applied directly to concrete, or a covering material applied directly to concrete, such as waterproofing, dampproofing, veneer plaster, painting, or another similar system. This is an as-cast concrete surface obtained with selected form-facing material, arranged in an orderly and symmetrical manner with a minimum of seams. Repair and patch defective areas with fins and other projections completely removed and smoothed.

C. Smooth-Rubbed Finish: Provide smooth-rubbed finish on scheduled concrete surfaces that have

received smooth-formed finish treatment not later than 1 day after form removal.

1. Moisten concrete surfaces and rub with carborundum brick or another abrasive until producing a uniform color and texture. Do not apply cement grout other than that created by the rubbing process.

D. Related Unformed Surfaces: At tops of walls, horizontal offsets, and similar unformed surfaces

adjacent to formed surfaces, strike-off smooth and finish with a texture matching adjacent formed surfaces. Continue final surface treatment of formed surfaces uniformly across adjacent unformed surfaces unless otherwise indicated.

3.10 MONOLITHIC SLAB FINISHES:

A. Scratch Finish: Apply scratch finish to monolithic slab surfaces to receive concrete floor topping or mortar setting beds for tile, portland cement terrazzo, and other bonded applied cementitious finish flooring material, and where indicated.

1. After placing slabs, finish surface to tolerances specified in Section 3.11. Slope

surfaces uniformly to drains where required. After leveling, roughen surface before final set with stiff brushes, brooms, or rakes.

B. Float Finish: Apply float finish to monolithic slab surfaces to receive trowel finish and other

finishes as specified; slab surfaces to be covered with membrane or elastic waterproofing, membrane or elastic roofing, or sand-bed terrazzo; and where indicated.

1. After screeding, consolidating, and leveling concrete slabs, do not work surface until

ready for floating. Begin floating, using float blades or float shoes only, when surface water has disappeared, or when concrete has stiffened sufficiently to permit operation of power-driven floats, or both. Consolidate surface with power-driven floats or by hand-floating if area is small or inaccessible to power units. Finish surfaces to tolerances specified in Section 3.11. Cut down high spots and fill low spots. Uniformly slope surfaces to drains. Immediately after leveling, refloat surface to a uniform, smooth, granular texture.

C. Trowel Finish: Apply a trowel finish to monolithic slab surfaces exposed to view and slab

surfaces to be covered with resilient flooring, carpet, ceramic or quarry tile, paint, or another



thin film-finish coating system.

1. After floating, begin first trowel-finish operation using a power-driven trowel. Begin final troweling when surface produces a ringing sound as trowel is moved over surface. Consolidate concrete surface by final hand-troweling operation, free of trowel marks, uniform in texture and appearance, and finish surfaces to tolerances specified in Section 3.11. Grind smooth any surface defects that would telegraph through applied floor covering system.

D. Trowel and Fine Broom Finish: Where ceramic or quarry tile is to be installed with thin-set

mortar, apply a trowel finish as specified, then immediately follow by slightly scarifying the surface with a fine broom.

E. Nonslip Broom Finish: Apply a nonslip broom finish to exterior concrete platforms, steps, and

ramps, and elsewhere as indicated.

1. Immediately after float finishing, slightly roughen concrete surface by brooming with fiber-bristle broom perpendicular to main traffic route. Coordinate required final finish with Architect before application.

F. Colored Wear-Resistant Finish: Apply a colored wear-resistant finish to monolithic slab surface

indicated.

1. Apply dry shake materials for the colored wear-resistant finish at a rate of 100 lb per 100 sq. ft., unless a greater amount is recommended by material manufacturer.

2. Cast a trial slab approximately 10 feet square to determine actual application rate, color, and finish, as acceptable to Architect.

3. Immediately following the first floating operation, uniformly distribute with mechanical spreader approximately two-thirds of the required weight of the dry shake material over the concrete surface, and embed by power floating. Follow floating operation with second shake application, uniformly distributing remainder of dry shake material with overlapping applications to ensure uniform color, and embed by power floating.

4. After broadcasting and floating, apply a trowel finish as specified. Cure slab surface with a curing compound recommended by the dry shake material manufacturer. Apply the curing compound immediately after the final finishing.

3.11 FLOOR FLATNESS/LEVELNESS REQUIREMENTS:

A. After placing slabs, finish surface to the following tolerances of F(F) (floor flatness) and F(L) (floor levelness) measured according to ASTM E 1155:

FINISH SLAB-ON-GRADE FRAMED FLOOR OVERALL LOCAL OVERALL LOCAL FF FL FF FL FF FF Scratch Finish 18 15 15 13 25 22 Float Finish 20 17 18 15 25 22 Trowel Finish 25 22 20 17 25 22



Specified overall F-numbers apply to the whole floor, taken as one. Minimum local F-numbers

apply to each slab, bounded by construction joints. 3.12 MISCELLANEOUS CONCRETE ITEMS:

A. Filling In: Fill in holes and openings left in concrete structures for passage of work by other trades, unless otherwise shown or directed, after work of other trades is in place. Mix, place, and cure concrete as specified to blend with in-place construction. Provide other miscellaneous concrete filling shown or required to complete Work.

B. Curbs: Provide monolithic finish to interior curbs by stripping forms while concrete is still

green and by steel-troweling surfaces to a hard, dense finish with corners, intersections, and terminations slightly rounded.

C. Equipment Bases and Foundations: Provide machine and equipment bases and foundations as

shown on drawings. Set anchor bolts for machines and equipment to template at correct elevations, complying with diagrams or templates of manufacturer furnishing machines and equipment.

3.13 CONCRETE CURING AND PROTECTION:

A. General: Protect freshly placed concrete from premature drying and excessive cold or hot temperatures. In hot, dry, and windy weather protect concrete from rapid moisture loss before and during finishing operations with an evaporation-control material. Apply according to manufacturer's instructions after screeding and bull floating, but before power floating and troweling.

B. No curing agents or sealers are to be applied to the concrete slab where Resilient Athletic

Flooring is scheduled. C. Start initial curing as soon as free water has disappeared from concrete surface after placing and

finishing. Weather permitting, keep continuously moist for not less than 7 days.

D. Curing Methods: Cure concrete by curing compound, by moist curing, by moisture-retaining cover curing, or by combining these methods, as specified.

1. Provide moisture curing by the following methods:

a. Keep concrete surface continuously wet by covering with water. b. Use continuous water-fog spray. c. Cover concrete surface with specified absorptive cover, thoroughly saturate

cover with water, and keep continuously wet. Place absorptive cover to provide coverage of concrete surfaces and edges, with a 4-inch lap over adjacent absorptive covers.

2. Provide moisture-retaining cover curing as follows: a. Cover concrete surfaces with moisture-retaining cover for curing concrete,

placed in widest practicable width with sides and ends lapped at least 3 inches and sealed by waterproof tape or adhesive. Immediately repair any holes or



tears during curing period using cover material and waterproof tape. 3. Apply curing compound on exposed interior slabs and on exterior slabs, walks, and

curbs as follows: a. Apply curing compound to concrete slabs as soon as final finishing operations

are complete (within 2 hours and after surface water sheen has disappeared). Apply uniformly in continuous operation by power spray or roller according to manufacturer's directions. Recoat areas subjected to heavy rainfall within 3 hours after initial application. Maintain continuity of coating and repair damage during curing period.

b. Use membrane curing compounds that will not affect surfaces to be covered with finish materials applied directly to concrete.

E. Curing Formed Surfaces: Cure formed concrete surfaces, including underside of beams,

supported slabs, and other similar surfaces, by moist curing with forms in place for the full curing period or until forms are removed. If forms are removed, continue curing by methods specified above, as applicable.

F. Curing Unformed Surfaces: Cure unformed surfaces, including slabs, floor topping, and other

flat surfaces, by applying the appropriate curing method.

1. Final cure concrete surfaces to receive finish flooring with a moisture-retaining cover, unless otherwise directed.

3.14 REMOVING FORMS:

A. General: Formwork not supporting weight of concrete, such as sides of beams, walls, columns, and similar parts of the work, may be removed after cumulatively curing at not less than 50 deg.F (10 deg.C) for 24 hours after placing concrete, provided concrete is sufficiently hard to not be damaged by form-removal operations, and provided curing and protection operations are maintained.

B. Formwork supporting weight of concrete, such as beam soffits, joists, slabs, and other structural

elements, may not be removed in less than 14 days or until concrete has attained at least 75 percent of design minimum compressive strength at 28 days. Determine potential compressive strength of in-place concrete by testing field-cured specimens representative of concrete location or members.

C. Form-facing material may be removed 4 days after placement only if shores and other vertical

supports have been arranged to permit removal of form-facing material without loosening or disturbing shores and supports.

3.15 REUSING FORMS:

A. Clean and repair surfaces of forms to be reused in the Work. Split, frayed, delaminated, or otherwise damaged form-facing material will not be acceptable for exposed surfaces. Apply new form-coating compound as specified for new formwork.



B. When forms are extended for successive concrete placement, thoroughly clean surfaces, remove fins and laitance, and tighten forms to close joints. Align and secure joint to avoid offsets. Do not use patched forms for exposed concrete surfaces except as acceptable to Architect.

3.16 CONCRETE SURFACE REPAIRS:

A. Patching Defective Areas: Repair and patch defective areas with cement mortar immediately after removing forms, when acceptable to Architect.

B. Mix dry-pack mortar, consisting of one part portland cement to 2-1/2 parts fine aggregate

passing a No. 16 mesh sieve, using only enough water as required for handling and placing.

1. Cut out honeycombs, rock pockets, voids over 1/4 inch in any dimension, and holes left by tie rods and bolts down to solid concrete but in no case to a depth less than 1 inch. Make edges of cuts perpendicular to the concrete surface. Thoroughly clean, dampen with water, and brush-coat the area to be patched with bonding agent. Place patching mortar before bonding agent has dried.

2. For surfaces exposed to view, blend white portland cement and standard portland

cement so that, when dry, patching mortar will match surrounding color. Provide test areas at inconspicuous locations to verify mixture and color match before proceeding with patching. Compact mortar in place and strike-off slightly higher than surrounding surface.

C. Repairing Formed Surfaces: Remove and replace concrete having defective surfaces if defects

cannot be repaired to satisfaction of Architect. Surface defects include color and texture irregularities, cracks, spalls, air bubbles, honeycomb, rock pockets, fins and other projections on the surface, and stains and other discolorations that cannot be removed by cleaning. Flush out form tie holes and fill with dry-pack mortar or precast cement cone plugs secured in place with bonding agent.

1. Repair concealed formed surfaces, where possible, containing defects that affect the

concrete's durability. If defects cannot be repaired, remove and replace the concrete.

D. Repairing Unformed Surfaces: Test unformed surfaces, such as monolithic slabs, for smoothness and verify surface tolerances specified for each surface and finish. Correct low and high areas as specified. Test unformed surfaces sloped to drain for trueness of slope and smoothness by using a template having the required slope.

1. Repair finished unformed surfaces containing defects that affect the concrete's

durability. Surface defects include crazing and cracks in excess of 0.01 inch wide or that penetrate to the reinforcement or completely through nonreinforced sections regardless of width, spalling, popouts, honeycombs, rock pockets, and other objectionable conditions.

2. Correct high areas in unformed surfaces by grinding after concrete has cured at least 14 days.

3. Correct low areas in unformed surfaces during or immediately after completing surface finishing operations by cutting out low areas and replacing with patching mortar. Finish repaired areas to blend into adjacent concrete. Proprietary underlayment



compounds may be used when acceptable to Architect. 4. Repair defective areas, except random cracks and single holes not exceeding 1 inch in

diameter, by cutting out and replacing with fresh concrete. Remove defective areas with clean, square cuts and expose reinforcing steel with at least 3/4-inch clearance all around. Dampen concrete surfaces in contact with patching concrete and apply bonding agent. Mix patching concrete of same materials to provide concrete of same type or class as original concrete. Place, compact, and finish to blend with adjacent finished concrete. Cure in same manner as adjacent concrete.

E. Perform structural repairs with prior approval of Architect for method and procedure, using

specified epoxy adhesive and mortar.

F. Repair methods not specified above may be used, subject to acceptance of Architect. 3.17 QUALITY CONTROL TESTING DURING CONSTRUCTION:

A. General: The Owner will employ a testing agency to perform tests and to submit test reports.

B. Sampling and testing for quality control during concrete placement may include the following, as directed by Architect.

1. Sampling Fresh Concrete: ASTM C 172, except modified for slump to comply with

ASTM C 94. a. Slump: ASTM C 143; one test at point of discharge for each day's pour of each

type of concrete; additional tests when concrete consistency seems to have changed.

b. Air Content: ASTM C 173, volumetric method for lightweight or normal weight concrete; ASTM C 231, pressure method for normal weight concrete; one for each day's pour of each type of air-entrained concrete.

c. Concrete Temperature: ASTM C 1064; one test hourly when air temperature is 40 deg.F (4 deg.C) and below, when 80 deg.F (27 deg.C) and above, and one test for each set of compressive-strength specimens.

d. Compression Test Specimen: ASTM C 31; one set of four standard cylinders for each compressive-strength test, unless otherwise directed. Mold and store cylinders for laboratory-cured test specimens except when field-cured test specimens are required.

C. Compressive-Strength Tests: ASTM C 39; one set for each day's pour exceeding 5 cu. yd. plus

additional sets for each 50 cu. yd. more than the first 25 cu. yd. of each concrete class placed in any one day, or for each 5000 sq ft of surface are placed; one specimen tested at 7 days, two specimens tested at 28 days, and one specimen retained in reserve for later testing if required.

1. Any additional cylinder required by the Contractor for early strength gain tests for form

stripping or post-tensioning are Contractor’s responsibility and shall be paid for by Contractor.

2. When frequency of testing will provide fewer than five strength tests for a given class of concrete, conduct testing from at least five randomly selected batches or from each batch if fewer than five are used.

3. When total quantity of a given class of concrete is less than 50 cu. yd., Architect may



waive strength testing if adequate evidence of satisfactory strength is provided. 4. When strength of field-cured cylinders is less than 85 percent of companion laboratory-

cured cylinders, evaluate current operations and provide corrective procedures for protecting and curing the in-place concrete.

5. Strength level of concrete will be considered satisfactory if averages of sets of three consecutive strength test results equal or exceed specified compressive strength and no individual strength test result falls below specified compressive strength by more than 500 psi.

6. Test results will be reported in writing to Architect, Structural Engineer, ready-mix producer, and Contractor within 24 hours after tests. Reports of compressive strength tests shall contain the Project identification name and number, date of concrete placement, name of concrete testing service, concrete type and class, location of concrete batch in structure, design compressive strength at 28 days, concrete mix proportions and materials, compressive breaking strength, and type of break for both 7-day tests and 28-day tests.

7. Nondestructive Testing: Impact hammer, sonoscope, or other nondestructive device may be permitted but shall not be used as the sole basis for acceptance or rejection.

8. Additional Tests: The testing agency will make additional tests of in-place concrete when test results indicate specified concrete strengths and other characteristics have not been attained in the structure, as directed by Architect. Testing agency may conduct tests to determine adequacy of concrete by cored cylinders complying with ASTM C 42, or by other methods as directed.

END OF CONCRETE

A NEW ADMINISTRATION OFFICE & STATIONHOUSE FOR CITY OF CULLMAN FIRE & RESCUE CITY OF CULLMAN CULLMAN, ALABAMA

__________________________________________________________________________________________________GOODWYN, MILLS & CAWOOD, INC. CONCRETE POLISHING AND DYEINGGM&C PROJECT NO. ABHM150026 03 3543 - 1 of 8

SECTION 03 3543CONCRETE POLISHING AND DYEING

PART 1 - GENERAL1.01 SUMMARY

A. This Section includes polished concrete finish for interior concrete floors denoted on Finish Scheduleas PC (Polished Dyed Concrete). Polished concrete finishes for precast concrete, verticalcast-in-place concrete, and exterior concrete are specified in the sections for those types of concrete.

B. Furnish all labor, material, equipment and services necessary for the dry diamond grinding andpolishing of concrete floors.

C. Applying densifying impregnator/sealer and polishing to specified sheen level and aggregateexposure.

D. Concrete must be cured a minimum of 28 days prior to polishing.E. Related Sections

1. Drawings and general provisions of Contract, including General Conditions and Division 1Specification Sections, apply to the work of this Section.

2. Section 03 3100 - Concrete.1.02 REFERENCES

A. American Concrete Institute (ACI):1. ACI302.1R-89, Guide for Concrete Floor and Slab Construction.

B. American Society for Testing and Materials:1. ASTM C779, Standard Test Method for Abrasion of Horizontal Concrete Surfaces.2. ASTM C805, Impact Strength.3. ASTM G23-81, Ultraviolet Light & Water Spray.4. ASTM 1028, Co-efficient of Friction.5. ASTM C 150, Type I, II Portland cement conformity, depending on soil conditions.6. ASTM C 33, Aggregate conformity.

C. Other Tests:1. Reflectivity.

1.03 SUBMITTALSA. Submit the following in accordance with Submittal Procedures in Division 1 Sections.B. Product data for each grinding machine, including all types of grinding heads, dust extraction system,

joint filler, concrete densifying impregnator, penetrating sealer, concrete dyes, joint filler, and anyother chemicals used in the process.

C. Applicators qualification data.D. Polished concrete samples: size 3"x3" for each Polished Concrete finish required.E. Maintenance procedures for Polished Concrete using diamond impregnated cleaning pads.

1.04 QUALITY ASSURANCEA. Basis of design: Polished ConcreteB. Certified Contractors:

1. Pre-qualified contractors meeting ALL requirements set forth within specifications.2. No substitutions will be allowed or approved.



C. Mandatory Pre Pour Installation Conference: Conduct conference at project site to comply withrequirements in Division 1 Sections “Special Conditions” and “Administrative Requirements”.1. The mandatory preinstallation conference shall occur prior to any concrete pours.2. The purpose of the mandatory preinstallation conference is to review the criteria with the

General Contractor, concrete subcontractor, concrete finish manufacturer, concrete finishinstaller and concrete polishing contractor.

3. The meeting shall establish the following:a. Roles and expectations of each subcontractor.b. Days and times of concrete pour schedules.c. Sequencing of operations for pouring, curing, finishing and protection of finished concrete

surfaces.D. Provide project names, addresses, contact names, phone numbers of at least (5) five projects of

similar scope and size completed by the installer.E. Installer/applicator shall be certified by concrete grinding/polishing equipment, chemical

manufacturer and caulking manufacturer. Installer/applicator shall provide adequate number ofskilled workmen who are thoroughly trained and experienced in the necessary craft.

F. Manufacturer's Certification: Provide a letter of certification from both the equipment and chemicalmanufacturer stating that the installer is a Certified Contractor and is familiar with proper proceduresand installation requirements recommended by the manufacturer.

G. Mock-ups:1. General Contractor to notify applicator 7 days prior to pour to schedule finish of mock-up.2. Reserve 100 square feet for each color and finish at location adjacent to floor that will receive

polish, but will be covered with another flooring material. Mock-up floor shall be placed on thesame day, preferably the same pour as the floors to receive polish.

3. Install mock-ups to verify selections made under sample submittal and to demonstrate methodsand workmanship proposed for the project. If mock-up not possible, submitted samples will beaccepted as demonstrated methods & workmanship.

4. Aggregate selected must be tested to ensure it will accept polish.5. If stand alone mockup required, form should be clean and free from extraneous substance and be

at least a 12' x 12' with a level plywood bottom on level ground with unobstructed access aroundall four sides.

6. Control joints should be included in mock-up. Sawing performed by General Contractor canbegin as soon as the surface is firm enough not to displace any of the aggregate. Demonstrate 2colors separated by control joint.

7. Edges should be included in mock-up.8. Approved mock-ups may become part of the completed work if undisturbed at time of

substantial completion.9. Provide protection for Mock-up as specified for finished areas.

H. Protection: General Contractor shall protect areas to receive polished concrete finish at all timesduring construction to prevent oils, dirt, metal, excessive water and other potentially damagingmaterials from affecting the finished concrete surface. Protection measures listed below shall beginimmediately after the concrete slab is poured:1. General Contractor shall provide slab protection as specified in Part 3 Protection article below.2. All hydraulic powered equipment shall be diapered to avoid staining of the concrete.



3. All vehicle parking shall be prohibited on the finish slab area. If necessary to complete theirscope of work, drop cloths shall be placed under vehicles at all times.

4. No pipe cutting machine shall be used on the finish floor slab.5. Steel shall not be placed on the finish slab to avoid rusting.6. Acids and acidic detergents will not come in contact with slab.7. All painters will use drop cloths on the concrete. If paint gets on the concrete, it must be

immediately removed.8. All trades will be informed that the slab must be protected at all times.

I. Environmental Limitations1. Comply with manufacturers written instructions for substrate temperature and moisture content,

ambient temperature and humidity, ventilation and other conditions affecting chemicalperformance.

2. Flatness and levelnessa. Finish Concrete shall have a minimum Floor Flatness rating of at least 40.b. Finish Concrete shall have a minimum Floor Levelness rating of at least 30.c. Finish Concrete shall be cured a minimum of 28 days or at which point equipment can be

put on the slab and does not displace aggregate.3. Application of finish system shall take place a minimum of 21 days prior to fixture & trim

installation and/or substantial completion.4. Finish Concrete area shall be closed to traffic during finish floor application and after

application, for the time as recommended by manufacturer.J. Concrete Mix Design:

1. Concrete Mixture shall be 3000 PSI or higher, non air entrained.a. Any admixtures, plasticizers, slag, fly ash or anything taking the place of Portland-based

cement shall be kept to a minimum.b. The cement shall be Portland Cement Type I, conforming to ASTM C 150.c. Maintain concrete temperature below 85 degrees. Keep concrete as cool and moist for as

long as possible. In essence, decrease rate of hydration and drying to minimize cracking.d. Wet cures are most suitable, but if this cannot be achieved, use a penetrating, dissipating or

wax based cure and seal. Do not use a densifier/hardener material due to the grinding ofthe floor after 6 days.

e. All mix designs must be approved by Architect. Send all approved mix designs toInstaller/Applicator.

f. The Engineer/Architect shall determine the saw cut pattern, color and layout.g. Color loads for integral color should never be smaller than three (3) cubic yards.h. Use one (1) source for cement, aggregates and pozzolans throughout the job. Monitor and

control incoming material consistency. Do not use calcium chloride-based admixtures. Non-chloride admixtures may be used.

i. Wash out all drums before loading. Keep slumps consistent with a maximum of four (4). Minimize driver added water maintaining a .45 water content ratio.

j. Place concrete to achieve as true and smooth a top surface as possible. Mounds, or dips arenot acceptable. GC shall control overall flatness and levelness, including on sloping areasto within tolerances permitted by specification - ASTM E1155.

k. Slab shall be protected from indention and footprints during pour and curing.



PART 2 - PRODUCTS2.01 POLISHING MATERIALS

A. Three-phase 480 Volt generator.B. 3 head or 4 head counter rotating, variable speed, electric floor grinding/polishing machines with at

least 600 pounds down pressure. For example: HTC 950RX, HTC 800 HD, SASE PDG 8000,Husqvarna PG 820. No substitutions allowed.

C. HTC/Pullman Dust extraction system, pre-separator, and squeegee attachments with minimum flowrating of 322 cubic feet per minute such as the HTC 75D, HTC 86D, T8600, T12600, Bull 500, Bull1250 & T55 or C5500. No substitutions allowed.

D. Grinding tools:1. Metal bonded diamonds 40, 80, and 150 metal or QuickCut transitional.2. Resin bonded diamonds 100, 200, 400, and 800 grits.

E. Grinding Pads for Edges:1. Metal bonded diamonds 50 and 100 grits.2. Resin bonded diamonds 100, 200, 400, and 800 grits.

F. Hand Grinder with dust extraction attachment and pads.G. Densifier: a concrete hardener chemically reactive, waterborne solution of inorganic silicate or

siliconate materials and proprietary components; odorless; colorless which hardens and densifiesconcrete surfaces to protect against abrasion, dusting, and absorption of liquids.1. Ameripolish 3D HS; Ameripolish, Inc.2. SASE SFS D2; SASE Company, Inc.3. Consolideck LS; PROSOCO.4. No substitutions allowed.

H. Control Joint and Saw Cut Filler, two part polyurea.1. Hi-Tech HT-PE85; Hi-Tech Systems.2. Spal-Pro RS-88; Metzger/McGuire.3. Euclid QuickJoint 200, (Grey Only); Euclid Chemical Company.4. No substitutions allowed.

I. Dye: A penetrating dye that chemically combines with cured concrete to produce permanent,variegated or translucent color effects.1. Ameripolish Dye; Ameripolish, Inc.2. SASE Signature Dye; SASE Company, Inc.3. Gemtone Stain; PROSOCO.4. No substitutions allowed.

J. Penetrating Stain Guard: Protection from debris and contaminants.1. Ameripolish 3D SP; Ameripolish, Inc.2. SASE SPR3-WB; SASE Company, Inc.3. Consolideck LS Guard; PROSOCO.4. No substitutions allowed.

K. Stain Resistor/Inhibitor: Additional protection for food service areas.1. Ameripolish SR2 Stain Resistor; Ameripolish, Inc.2. SASE SPR3 Oil, Water & Stain Inhibitor; SASE Company, Inc.3. No substitutions allowed.



L. Diamond Impregnated Burnishing Pads.1. Trifecta Pads; SASE Company, Inc.2. Twister Pads; HTC.3. No substitutions allowed.

PART 3 - EXECUTION3.01 PREPARATION

A. Installer shall examine and approve concrete substrate for conditions affecting performance of finish. General Contractor shall correct conditions that are found to be out of compliance with therequirements of this section. Repairs are not acceptable unless specifically approved on acase-by-case basis by the Architect.

B. Verify that base slab meet finish and surface profile requirements listed in Division 3, Section “Castin Place Concrete”.

C. Provide floor clean of materials and debris.D. Protect adjacent surfaces as required to prevent damage by the concrete polishing procedure.E. Setup grinding machine, dust extraction system, tooling, and generator.F. Ensure floor cured to accept polishing application.

3.02 POLISHED CONCRETE APPLICATIONA. Applicator shall examine the areas and conditions under which work of this section will be provided

and the General Contractor shall correct conditions detrimental to the timely and proper completionof the work and the Applicator shall not proceed until unsatisfactory conditions are resolved.

B. Fill construction joints and cracks with filler products as specified in accordance with manufacturersinstructions colored to match (or contrast) with concrete color as specified by architect. All controljoint and decorative saw cut filling must be preformed prior to grinding application.

C. Grind the concrete floor to within 2 -3 inches of wall with 40 grit metal, 80 grit metal and 150 gritmetal, or QuickCut transitional diamonds removing construction debris, floor slab imperfections anduntil there is a uniform scratch pattern and desired concrete aggregate exposure is achieved. Eachsubsequent grind shall be at 90 degrees from each previous grind and remove all the scratches fromthe previous grind. Vacuum the floor thoroughly using a squeegee vacuum attachment. Utilize theleast aggressive diamond tooling necessary to remove all debris and to achieve uniform scratchpattern. Final surface finish to be salt and pepper.

D. Grind the edges with 50 and 100 grit metal grinding pads, prior to grinding the floor with each stepon the larger diamond grinder, removing all of the scratches from the previous grit. Vacuum the floorthoroughly after each grind, using a squeegee vacuum attachment.

E. Polish the floor with resin bonded diamond grits of 100, 200, 400, first polishing the edges with padsof the same grit and then the field of the floor, removing all scratches from the previous grit. Aftereach polish, clean the floor thoroughly using a vacuum with a squeegee attachment. After the 400grit polishing step thoroughly clean the floor with a mop or auto-scrubber to prepare for dye.

F. Apply dye color per Manufacturer's recommendations. Apply 2 coats of dye to achieve desiredcoloration.

G. Apply densifying impregnator undiluted as per manufacturer's specifications and guidelines. Coverthe entire work area liberally and allow to sit for 10 minutes. Apply again to areas where the



densifying impregnator has soaked in and allow to sit for an additional 30 minutes. Squeegee excessmaterial off the floor.

H. Polish the floor with resin bonded diamond grit of 800, first polishing the edges with pads of thesame grit and then the field of the floor, removing all scratches from the previous grit. Afterpolishing, clean the floor thoroughly using clean water and an auto-scrubber or a mop and a wetvacuum.

I. Apply Penetrating Stain Guard with a microfiber applicator and burnish with a fine, 800 grit, or veryfine, 1500 grit, diamond impregnated burnishing pad.

J. Where required, apply Stain Resistor/Inhibitor with a microfiber applicator and burnish with a fine,800 grit, or very fine, 1500 grit, diamond impregnated burnishing pad.

K. Upon completion, the work shall be ready for final inspection and acceptance by the customer.3.03 LOGO STENCILING

A. Complete the polish and dying process with the same color as used in all other areas.B. Apply the stencil.

1. This is a heavier rubber membrane type material with an adhesive back. The stencil may need tocome in multiple sections based on size. Lay the stencil out on the floor prior to removing theadhesive cover. Check alignment and centering of the logo. The logo should fit betweenconcrete control joints. When sure of the location of the stencil, remove the adhesive cover andplace the stencil. The stencil should be adequately oversized to allow protection of the adjacentfinish when bead blasting.

C. Carefully and diligently roll the stencil to insure good adhesion to the floor. Pay attention to alldetailed areas and thin sections. Do not allow the outside perimeter of the adhesive backed stencil tostick to the floor. This can be achieved by using a barrier like paper acting as a bond breaker justunderneath the outside perimeter of the stencil roughly 1" which prevents it from adhering to theconcrete so that once removed, you do not see the ghosting or removal of the dye color.

D. Bead blast over the stencil until achieving a minimum credit card thickness in depth (slightly deeperwill not hurt and will allow better adhesion of the polyaspartic without creating a "lip").

E. Clean up the debris left from the bead blast with a vacuum.F. With the stencil still in place and after the blasted area has been thoroughly cleaned and vacuumed,

apply solvent-based concrete dye, color to be specified by architect. (Note: it is critical to check thedepth of the blasted area making sure proper depth has been achieved prior to the application of thedye.) For best results, it is best to apply the dye using an HVLP (high volume/low pressure) gravityfed cup gun sprayer, spraying at a pressure of roughly 25-30 psi. Allow dye to dry completely.

G. Remove the logo stencil as soon as possible after dyeing. Do not leave any longer than necessary as itmay cause discoloration of the adjacent floor.

H. Once the stencil has been removed and after the concrete dye has had sufficient cure time, apply twocomponent polyaspartic coating per the manufacturers recommendations. This two part system curesrapidly so small batches should be mixed making sure to measure the exact specified ratios of the Aside and B side. Once mixed, one person should pour a small ribbon of material in to the recessedstenciled area while other workers using small 1/2 inch artist brushes simply move the material in toplace. It is very important to pay close attention to detail during the application process. Do not overfill the area making sure to keep clean crisp edges. It is preferred to have the material level outslightly lower than the top edge of the concrete roughly 1/16 inch. Slight thinning of the polyaspartic



using MEK (methyl ethyl ketone) will help the material flow better and extend the working time. Thinning should be between 5% up to and never exceeding 10%.

I. Under normal conditions (70 degrees) the polyaspartic coating should be tack free within two hours.During the curing process, the area should be properly barricaded making sure that foot traffic is keptoff of the surface for a minimum of 6-8 hours and any vehicular traffic such as rubber tired lifts orpallet jacks for a minimum of 24 hours.

3.04 PROTECTIONA. Protection: General Contractor shall protect areas to receive polished and dyed concrete finish at all

times during construction to prevent oils, dirt, metal, excessive water and other potentially damagingmaterials from affecting the finished concrete surface. Protection measures listed below shall beginimmediately after the concrete slab is poured.

B. Plywood slab protection in traffic corridors, entry ways, and areas to receive polishing and dyeingshall be provided by and maintained by General Contractor throughout construction until thepolishing and dyeing contractor takes ownership of the floor. Protection shall be sufficient to protectsurface from damage due to traffic and impact from any and all construction activities. Use aminimum of 1/2-inch plywood. All seams of plywood shall be sealed to eliminate passage of debristo new floor.

C. Protect slab during masonry work and after completion of polishing and dyeing work with minimumof 1/2-inch plyboard, with sealed seams.

D. Do not allow any trade to park any vehicles on the inside slab. If necessary to complete their scope ofwork, drop cloths will be placed under vehicles at all times.

E. Diaper all hydraulic powered equipment to avoid staining of the concrete.F. Place no steel on interior slab to avoid rust stains and gouges. If construction dictates necessity of

this, interior slab will be protected with 1/2-inch plyboard.G. Do not allow acids and acidic detergents to come into contact with slab.H. Inform all trades that the slab must be protected at all times.I. Protect finished work until fully cured in accordance with manufacturer's recommendations.J. Protect completed floor from damage until Substantial Completion.

1. Do not allow vehicle and pedestrian traffic on unprotected floor.2. Do not allow construction materials, equipment, and tools on unprotected floor.

K. Immediately remove mortar splatter, spilled liquids, oil, grease, paint, coatings, and other surfacecontaminants which could adversely affect completed floor.

L. Repair damaged areas of completed floor to satisfaction of Architect.M. Protect floor from traffic for at least 72 hours after final application of polishing and dyeing.N. Upon completion of polishing and dyeing, the General Contractor and the finishing subcontractor

shall replace the plywood protection for the duration of the project.PART 4 - SCHEDULES4.01 SHEEN

A. Polished Concrete Level 2 - 800 grit (Medium Gloss Finish):1. At a distance of 30 to 50 feet, the floor will reveal moderate light reflection.

a. Yield an average gloss reading of 40-60, as measured by a Horiba Gloss Meter.



4.02 EXPOSED AGGREGATEA. Minimal exposure, Salt and Pepper

4.03 COLORA. Dye Color: See Finish Schedule.

END OF SECTION 03 3543


__________________________________________________________________________________________________GOODWYN, MILLS & CAWOOD, INC. CURING, SEALING AND HARDENING CONCRETE FLOORSGM&C PROJECT NO. ABHM150026 03 3931 - 1 of 4

SECTION 03 3931CURING, SEALING AND HARDENING CONCRETE FLOORS

PART 1 - GENERAL1.01 SUMMARY

A. Section Includes:1. Floors denoted on Finish Schedule as SC (Sealed Concrete).2. Floors denoted on Finish Schedule as SSC (Stained Sealed Concrete).

B. Related Sections1. Drawings and general provisions of Contract, including General Conditions and Division 1

Specification Sections, apply to the work of this Section.2. Section 03 3100 - Concrete.

1.02 SUBMITTALSA. Contractor shall submit specified manufacturer's complete technical data sheets for all products to be

used, including installation instructions.1.03 QUALITY ASSURANCE

A. Manufacturer Qualifications: Manufacturer of specified sealer shall have a minimum 10 yearsexperience in the production of the specified products.

B. Contractor Qualifications: Contractor must have a minimum 3 years experience in sealingapplications and successfully completed not less than 6 projects comparable in scale and complexity.

C. Regulatory Requirements1. Products shall comply with the United States Clean Air Act for maximum Volatile Organic

Compound (VOC) content as specified in PART 2 of this section.D. Mockups and Field Samples: Prepare field sample at project site for architects review and approval.

1. Samples shall be constructed on site and shall be 4'x4'. If there is existing concrete, theArchitect shall select an area where the samples will be placed.

2. Construct sample-using processes and techniques intended for use on permanent work, includingcuring procedures. Include samples of control, construction, and expansion joints in samplepanels.

3. Sample shall be sealed by the individual workers who will actually be performing the work forthe project.

4. Obtain written approval of the sample from project Architect before start of work.5. Retain approved samples through completion of the work for use as a quality standard for

finished work.6. The mockup may remain part of the finished work if approved.

E. Mandatory Pre Pour Installation Conference: Conduct conference at project site to comply withrequirements in Division 1 Sections “Special Conditions” and “Administrative Requirements”.1. The mandatory preinstallation conference shall occur prior to any concrete pours.2. The purpose of the mandatory preinstallation conference is to review the criteria with the

General Contractor, concrete subcontractor, concrete finish manufacturer, and concrete finishinstaller.

3. The meeting shall establish the following:a. Roles and expectations of each subcontractor.b. Days and times of concrete pour schedules.



c. Sequencing of operations for pouring, curing, finishing and protection of finished concretesurfaces.

1.04 DELIVERY, STORAGE AND HANDLINGA. Deliver the specified products in original, unopened containers with legible manufacturer's

identification and information.B. Store specified products in conditions recommended by the manufacturer.

1.05 JOB SITE CONDITIONSA. Environmental Conditions: Maintain an ambient temperature of between 50° F and 90° F during

application and at least 48 hours after application.B. Protection: Precautions shall be taken to avoid damage or contamination of any surfaces near the

work zone. Protect completed stain work from moisture or contamination.PART 2 - PRODUCTS2.01 MANUFACTURERS

A. Prosoco, Inc.: www.prosoco.com.B. Dayton Superior Corporation: www.daytonsuperior.com.C. Substitutions: See Section 01 6000 - Product Requirements.

2.02 PRODUCTSA. Consolideck LS/CS lithium silicate sealer, hardener & densifier for concrete [Basis of Design]:

www.prosoco.com.1. Provide with premeasured color concentrate to tint floor, if scheduled. ColorHard by Prosoco

[Basis of Design] for color. Color as selected by Architect.2. Provide with protection and sheen enhancer coat. LSGuard by Prosoco [Basis of Design].

B. Pentra-Hard Densifier lithium silicate densifier, sealer, dustproofer and hardener for concrete: www.daytonsuperior.com.1. Provide with color as selected by Architect, if scheduled.2. Provide with protection and sheen enhancer coat recommended by manufacturer.

C. Substitutions: The use of any products other than those specified will be considered providing thatthe contractor requests its use in writing within fourteen (14) days prior to bid date. This requestshall be accompanied by:1. A certificate of compliance from the material manufacturer stating that the proposed products

meet or exceed the requirements for this specification.2. Documented proof that the proposed material has a five (5) year proven record of performance

for sealing, hardening and densifying concrete substrates, confirmed by at least two (2) localprojects that the Architect can examine.

PART 3 - EXECUTION3.01 EXAMINATION

A. Verification of Conditions: Contractor shall examine areas and conditions under which work will beperformed and identify conditions detrimental to proper and timely completion of work. Do notproceed until unsatisfactory conditions have been corrected.

3.02 PREPARATIONA. New Concrete



1. Apply sealer/densifier immediately after final finishing and installation of control joints (ifmanufacturer's recommendations permit); when the concrete surface won't be marred by foottraffic and after joints have been cut and cleaned or anytime thereafter. Remove soft cut sawdebris prior to applying sealer/densifier. Surface shall be swept, and mopped orpressure-washed as necessary to insure no dirt, grit, trash, or similar items mar finished product. Remove all markings, including paint, marker or pencil marks. Inspect floor surface prior toapplication to be sure it is ready for sealer/densifier.

B. Existing Concrete1. Remove all dirt, debris, or curing compounds using appropriate surface prep cleaner. Allow

cleaning waters used in surface preparation to dry.3.03 APPLICATION OF SEALER

A. New Concrete1. The surface shall be sealed with a sealer produced of the type specified under Products above.

a. Also apply manufacturer's protection coat as specified above.2. Apply at the rates and method recommended by manufacturer in written instructions which the

installer shall have at the job site.3. Apply a single coat using low pressure sprayer fitted with 0.5 gal/min spray tip. Lightly apply

sufficient product to wet the surface without producing puddles. Use clean, soft bristle pushbroom or microfiber pad to spread the product evenly and ensure uniform wetting. Avoidspreading once drying begins. Scrubbing is not necessary.

4. If surfaces dry immediately, increase the rate of application. Surfaces should remain wet 5 to 10minutes. Adjust rate of application to eliminate puddles. Any white residue must be removedimmediately.

5. Allow treated surfaces to dry.6. For uncured steel troweled concrete, immediately apply the specified curing compound or

initiate specified curing procecure.7. When the curing process is complete, use an automatic floor scrubber equipped with cleaning

pads or brushes appropriate for removal of accumulated construction soiling and surfaceresidues. Avoid pads or brushes which may damage the finished floor.

B. Existing Concrete1. The surface shall be sealed with a sealer produced of the type specified under Products above.

a. Also apply manufacturer's protection coat as specified above.2. Apply at the rates and method recommended by manufacturer in written instructions which the

installer shall have at the job site.3. Apply a single coat using low pressure sprayer fitted with 0.5 gal/min spray tip. Lightly apply

sufficient product to wet the surface without producing puddles. Use clean, soft bristle pushbroom or microfiber pad to spread the product evenly and ensure uniform wetting. Avoidspreading once drying begins. Scrubbing is not necessary.

4. If surfaces dry immediately, increase the rate of application. Surfaces should remain wet 5 to 10minutes. Adjust rate of application to eliminate puddles. Any white residue must be removedimmediately.

5. Allow treated surfaces to dry.6. Remove any dried powder residue using a stiff broom, power sweeper, or auto-scrubbing

machine.7. Dry-Buff or burnish concrete surface in both directions with orbital floor machine or burnisher

equipped with appropriate polishing pad for additional surface sheen.



3.04 PROTECTIONA. Protection: General Contractor shall protect areas to receive sealed concrete finish at all times during

construction to prevent oils, dirt, metal, excessive water and other potentially damaging materialsfrom affecting the finished concrete surface. Protection measures listed below shall beginimmediately after the concrete slab is poured.

B. Plywood slab protection in traffic corridors, entry ways, and areas to receive sealer shall be providedby and maintained by General Contractor throughout construction until the finishing contractor takesownership of the floor. Protection shall be sufficient to protect surface from damage due to trafficand impact from any and all construction activities with a minimum of 1/2" plywood. All seams ofplywood shall be sealed to eliminate passage of debris to new floor.

C. Protect slab during masonry work and after completion of sealed concrete finish work with minimumof 1/2-inch plyboard, with sealed seams.

D. Do not allow any trade to park any vehicles on the inside slab. If necessary to complete their scope ofwork, drop cloths will be placed under vehicles at all times.

E. Diaper all hydraulic powered equipment to avoid staining of the concrete.F. Place no steel on interior slab to avoid rust stains and gouges. If construction dictates necessity of

this, interior slab will be protected with 1/2-inch plyboard.G. Do not allow acids and acidic detergents to come into contact with slab.H. Inform all trades that the slab must be protected at all times.I. Protect finished work until fully cured in accordance with manufacturer's recommendations.J. Protect completed floor from damage until Substantial Completion.

1. Do not allow vehicle and pedestrian traffic on unprotected floor.2. Do not allow construction materials, equipment, and tools on unprotected floor.

K. Immediately remove mortar splatter, spilled liquids, oil, grease, paint, coatings, and other surfacecontaminants which could adversely affect completed floor.

L. Repair damaged areas of completed floor to satisfaction of Architect.M. Protect floor from traffic for at least 72 hours after final application of sealer.N. Upon completion of sealer, the General Contractor and the finishing subcontractor shall replace the

plywood protection for the duration of the project.3.05 MAINTENANCE

A. Sealed floors should be maintained by sweeping. Spills should be cleaned when they occur and dirtshall be rinsed off with water. Heavily soiled areas may be wet-cleaned by mopping or by scrubbingwith a rotary floor machine equipped with a scrubbing brush and a suitable, high quality commercialdetergent. Interior floors that require polishing should be maintained using a compatible,premium-grade, emulsion-type, commercial floor polish, following manufacturer's instructions andsafety requirements.

END OF SECTION 03 3931