Transcript
CONSTRUCTION COMPANY PVT LTD
ADVANTAGES & BENEFITS OF SYNTHETIC FIBRES IN CONCRETE FLOORING &
PLASTERING APPLICATIONS
BY
T.S. RAJAGOPALANDIRECTOR TECHNICAL
19th August 2004
BANGALORE
The idea of using fibers in concrete materials dates back to Roman and Egyptians period
Romans included bits of horsehair in the construction of
ROMAN COLISEUM which was built in 80 AD
The Egyptians used straw in their bricks used for constructions
There are other historical references like TIPU Palace at Sriranganapatna and GOL GUMBAZ at Bijapur, where fiber reinforcement have been used in mortar
INTRODUCTION TO SECONDARY REINFORCEMENT OF CONSTRUCTION BY FIBRES
DRAW BACKS IN CONCRETE FLOORING WORKS Plastic shrinkage and plastic settlement cracks Less abrasion resistance and impact resistance of floors Weak construction joints Periodic maintenance of floors due to less durability Faster wearing of top floor surface
DRAW BACKS IN PLASTERING WORKS
Development of plastic shrinkage cracks in the initial stage of plastering High rebound loss of mortar High water and moisture absorption from external environment Less cohesive mix due to segregation Development of thermal and drying shrinkage cracks at the hardened surface
of plastering More maintenance of the walls required in terms of frequent waterproofing and painting
of the buildings Ugly crack patches
Generation 1 - Vegetable Fibers - Straw, Jute and Cotton, Coconut Fiber / Coir
Generation 2 - Horse hair, Sheep’s Wool
Generation 3 - Glass, Polyester, Nylon, Polypropylene and Steel
DEVELOPMENT OF FIBER REINFORCEMENT
Glass - Expensive, Causes itching, Hazardous
Steel - Corrosion, Dead Weight, Expensive, Mixing Problem
Nylon - Very Expensive
COMPARISON WITH VARIOUS TYPES OF FIBERS
Holds aggregates & does not allow separation of coarse aggregate due to vibration /gravity
Results move uniform concrete to concrete
Fiber allows slow transfer of water to surface, resulting in reduction of cracks
WHAT FIBRE DOES?
ACCEPTANCE CRITERIA FOR CONCRETE WITH SYNTHETIC FIBERS
Synthetic fibers are added to concrete to reduce plastic shrinkage cracking of reinforced concrete and structural plain concrete and/or to reduce shrinkage and temperature cracking in structural plain concrete slabs on grade
Consideration to be given to the volume, size and type of fibers used
The fibers are regarded as an admixture and are used in addition to any structural reinforcement, shrinkage and temperature reinforcement and joints as required in the applicable code
The fibers may be used in concrete over steel deck construction
The fibers may be used in fire-resistive construction on steel decks
BIND / HOLD CEMENT PARTICLE
M/s CALIBER CONSTRUCTIONS CO PVT LTD EXPERIENCE IN USING SYNTHETIC FIBERS IN PLASTERING APPLICATIONS
We have started using locally manufactured polyester synthetic fibers for plastering and flooring applications for the last TWO years
Our experiences with fibers are very much useful, encouraging with advantages and hidden benefits
We immensely feel that using of fibers as secondary reinforcement in all construction applications should be adopted by construction industry
In the following projects we have used synthetic fibers for plastering applications
FIBER REINFORCED PLASTERING IN OUR PROJECTS
SL NO PROJECT NAME BUILT UP AREA APPLICATIONS PLACE
1 M/s Shreetronics Enterprises 17000 SftInternal & External
plasteringElectronics City, Bangalore
2 M/s Velankani Information Systems Ltd 135000 SftInternal & External
plasteringElectronics City, Bangalore
3 M/s Impact Safety Glass Works Pvt Ltd 40000 SftInternal & External
plasteringAvalahalli, Bangalore
4 M/s Bhupathi Tennis Academy Pvt Ltd 23000 Sft External plasteringKodihalli, Bangalore
5 Apartment for Mr. Kiron Shah 7000 SftInternal & External
plasteringLavelle Road, Bangalore
6Common Amenity Centre for Electronics
City Industries Association 12500 SftInternal & External
plasteringElectronics City, Bangalore
PROJECTS OF M/S CALIBER CONSTRUCTIONS
SYNTHETIC FIBERS USED FOR CONCRETE FLOORING AT OUR PROJECTS
CONCRETE FLOORING WORKS
SL NO PROJECT NAME BUILT UP AREA APPLICATIONS
1 Impact Safety Glass Works Pvt Ltd 40000 SftConcrete industrial flooring and
road pavement
2 Bhupathi Tennis Academy Pvt Ltd 23000 Sft Concrete Tennis Courts
3 Mt. Meru Apartments, Hyderabad 7000 Sft Concrete Tennis Court
VELANKANI TECH PARK
VELANKANI TECH PARK
TENNIS COURTS
NIKE - BHUPATHI TENNIS VILLAGE
Tennis Court at Mt. Meru Apartments, Hyderabad
Tennis Court at Mt. Meru Apartments, Hyderabad
IMPACT SAFETY GLASS WORKS PVT LTD
ELCIA COMMON AMENITY CENTER
SHREETRONICS
RESIDENTIAL APARTMENT AT LAVELLE ROAD
ADVANTAGES & BENEFITS OF USING FIBERS IN PLASTERING AT OUR PROJECTS
Fibers were instrumental in reducing shrinkage cracks
Rebound loss of the mortar has been reduced to 10 % instead of 30 to 40 % with out fibers in the mortar
There is no Dampness and leakage of plastered walls
Better finish of wall surface
Increased strength of mortar due to which more durable and long lasting constructions
Savings due to economic mix designs and more durable plastered surface
Compressive strength of plaster was increased by over 15-20%
Results in Cement savings up to 3%
Increase in labour productivity by over 5%
ADVATAGES & BENIFITS OF USING FIBERS IN CONCRETE FLOORING WORKS
The use of fibers has improved the abrasion resistance of concrete floors to moving loads
No appearance of plastic shrinkage and plastic settlement cracks on the concrete floor surface
Service life of the floor is enhanced due to high durable concrete produced with synthetic fibers
Improved impact resistance of floors to point loads Concrete mix with fibers was cohesive with better workability Compressive strength of plaster was increased by over 8-10%
CONCLUSION AND PATH FORWARD
Use of Synthetic Fibers in all construction applications should be encouraged by the construction industry
Different types of fibers should be developed to address each specific need of construction applications
Construction industry should encourage new technologies like fibers reinforcement in construction to a larger extent for improving the durability and serviceability of the building and structures
We look forward to cementing a relationship with you.
Thank you
CONTACT
No. 43, Electronics City Phase II, Hosur Road, Bangalore-560 100.
Phone: +91-80-2501 4008, Fax: +91-80-2852 3934Email: info@calibercompany.com
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