Product - formtex.cz · BS 1881-207 : 1992 Testing concrete. Recommendations for the assessment of concrete strength by near-to-surface tests BS 1881-208 : 1996 Testing Concrete.

Readers are advised to check the validity of this Certificate by either referring to the BBA’s website (www.bbacerts.co.uk) or contactingthe BBA direct (Telephone Hotline 01923 665400).

1 The Building Regulations 2000 (as amended) (England and Wales)In the opinion of the British Board of Agrément, the use of FormtexControlled Permeability Formwork Liner is not subject to these Regulations.

2 The Building Standards (Scotland) Regulations 1990 (as amended)In the opinion of the BBA, the use of Formtex Controlled PermeabilityFormwork Liner is not subject to these Regulations.

3 The Building Regulations (Northern Ireland) 2000In the opinion of the BBA, the use of Formtex Controlled PermeabilityFormwork Liner is not subject to these Regulations.

Fibertex A/SBox 8029Svendborgvej 2DK – 9220Aalborg ØstDenmarkTel: 00 45 9635 3535 Fax: 00 45 9815 8555e-mail: [email protected]: www.formtex.dk

AgrémentCertificate

No 03/4038

Designated by Governmentto issue

European TechnicalApprovals

FORMTEX CONTROLLED PERMEABILITY FORMWORK LINERRecouvrement de coffrageVerschalungsabdechung

Product

Regulations• THIS CERTIFICATE OFCONFIRMATION RELATES TOFORMTEX CONTROLLEDPERMEABILITY FORMWORKLINER (CPF), A TWO-LAYER,NON-WOVEN POLYPROPYLENEFABRIC LINER.• The product is tensioned orglued to conventional formwork.• The product enhances thedurability and surfaceappearance of concrete, bysignificantly reducing thepermeability of the concreteappearance by virtualelimination of the blowholes andother surface defects.• The product is used for castingPortland cement or blendedPortland cement concretes of allcurrently accepted grades.

CI/SfB

B2d

continued

Formtex Normal

2

continued 4 Construction (Design and Management) Regulations 1994 (as amended)Construction (Design and Management) Regulations (Northern Ireland) 1995(as amended)

Information in this Certificate may assist the client, planning supervisor, designerand contractors to address their obligations under these Regulations.See section: 6 Delivery and site handling (6.1).

• The product reduces the risk ofcracks and micro cracks normallyassociated with the early dryingof a concrete surface.

Confirmation of Danish AgrémentNo 2002/021 issued by ETA —Danmark A/S to the Certificateholder.

Technical Specification5 Description5.1 Formtex is a controlled permeability formwork (CPF)liner that is tensioned over or glued to most conventionaltypes of formwork.

5.2 The product is a two-layer, non-wovenpolypropylene fabric. It has a weight of 250 gm–2 andthickness of 1.2 mm.

5.3 The fabric is thermally bonded on one side tocreate a filter, and the non-thermally bonded sidefunctions as a drainage layer. The pore size of the filteris designed to retain the cement particles while allowingwater to pass through.

5.4 Fresh concrete is placed and vibrated as usual,and excess water and entrapped air are drained fromthe concrete surface by the liner. If the liner is left on theconcrete, it can be used to assist with further curing.

5.5 Quality control checks are made on the rawmaterials and on the final product for:• strength• creep• elongation• air permeability• tear strength.

6 Delivery and site handling6.1 Formtex CPF is supplied in rolls with a width of2.75 m, 3.2 m or 4.0 m and a length of 50 m or100 m, weighing from 34 kg to 100 kg(1).(1) Special widths can be produced for larger projects.

6.2 The product is delivered in rolls, wrapped inpolyethylene bearing a self-adhesive label showing theCertificate holder’s name and roll identification number.

6.3 The rolls should be stored vertically or horizontallyon a smooth, clean surface. Opened rolls should beprotected from direct sunlight. Formtex CPF alreadyinstalled on formwork should not be exposed to sunlightfor periods exceeding two weeks.

Design Data7 General7.1 Formtex Controlled Permeability Formwork Linershould be specified and used strictly in accordance withthis Certificate and the Certificate holder’s instructions.

7.2 The Certificate holder should be consulted foradvice on design, and on the suitability of anyproposed admixtures.7.3 The product should be correctly tensioned inaccordance with section 13 of this Certificate.7.4 This Certificate covers the initial use of the productonly, and not its re-use.7.5 Some colour variation of the concrete surface mayoccur.

8 Characteristic properties8.1 When tested in accordance with EN 965 : 1995,the product had a mean weight of 250 gm–2 and amean thickness of 1.2 mm.8.2 When tested in accordance with ASTM D 4533 :1991, the product had a mean tear strength of 250 Nlongitudinal and 200 N traverse.8.3 When tested to the optical method, the producthad a mean pore size of <30 µm.8.4 When tested in accordance with the EuropeanDisposables and Non-Wovens Association method, theproduct had an air permeability of 250 ls–1m–2.

9 Properties in relation to fire9.1 Formtex CPF melts at 165°C and starts shrinkingsignificantly above 120°C, therefore, direct exposure toheat should be avoided.9.2 In particular, welding or steel cutting should not becarried out close enough to damage the liner.

10 Properties of the resultant concrete10.1 Comparative properties of concrete producedwith Formtex CPF on one side and without on the otherare listed in Table 1. The concrete used is a C45 gradeconcrete with a Portland cement content of 340 kgm–3

and water/cement ratio of 0.53.

Table 1 Tests on panels and cores(1)

Test Test method Formtex Controlconcrete concrete

Surface tensile test (MPa) BS 1881-207 3.1 1.6ISAT (ml m–2s–1) BS 1881-20810 min 0.028 0.18130 min 0.000 0.09460 min 0.000 0.060

Surface hardness BS 1881-202 49.0 37.5Carbonation resistance prEN 104-839[depth (mm)] 3.9 13.9

Sorptivity (mm min–½) AG TM/95/01/issue 1(2) 0.15 0.31

Chloride diffusion 130S/MW001/JM/(m2s–1 at 20°C) issue 1(3) 6.56 x 10–13 12.9 x 10–13

Freeze/thaw Rilem recommendation[weight loss (mg mm–2)] CDC 2 : 197710 cycles no damage considerable

–0.00 damage –0.0720 cycles no surface severe surface

damage damage–0.01 –1.41

25 cycles basically very severeundamaged damage

–0.01 –2.21(1) Tests performed by Taywood Engineering Ltd.(2) Sorptivity of oven-dried specimens to TEL in-house test procedure Watersorption test.(3) Chloride diffusion to test procedure 1 in accordance with TEL proforma.

10.2 When compared to equivalent concrete castwithout the product, concrete cast against Formtex CPF:• has an enhanced resistance to carbon dioxide and

ingress of chloride ions• has an enhanced resistance to frost attack• reduces the permeability of the concrete• has an enhanced surface tensile strength and surface

hardness.

11 DurabilityWhen compared to equivalent concrete cast without theproduct, cured concretes cast using Formtex CPF havebeen shown to have enhanced properties.Therefore, useof the product will produce a more durable concrete.

Installation12 General12.1 Formtex CPF should be installed strictly inaccordance with this Certificate and the Certificateholder’s instructions.12.2 Form oils or release agents may not be used withthe product.

13 Fixing13.1 The product must be tensioned over the face ofthe backing formwork in accordance with this Certificateand the Certificate holder's instructions. It is importantthat the product is tensioned in both the longitudinal andtransverse directions, to avoid the formation of folds andundue dimensional changes induced by exposing theproduct to low levels of heat.13.2 The liner should continue under the formwork toensure the adequate disposal of water.

14 SupervisionThe level of supervision during the installation of FormtexCPF should be sufficient to ensure the quality ofworkmanship as described in BS 5328-1 : 1997,BS 5328-2 : 1997, BS 5328-3 : 1990, BS 5328-4 :1990 and BS 8000-2.2 : 1990.

Technical InvestigationsThe following is a summary of the technicalinvestigations carried out on Formtex ControlledPermeability Formwork Liner.

15 Tests15.1 As part of the assessment by ETA – Danmark A/Sleading to the issue of Agrément No 2002/0021, testswere carried out to determine:On Formtex• pore size• weight• thickness• air permeability• tear strength• composition.On the resultant concrete• surface tensile strength• initial surface absorption• surface hardness• sorptivity• carbonation resistance• chloride diffusion• freeze/thaw behaviour.

15.2 As part of the same assessment, an examinationwas made of existing data using concretes cast againstFormtex CPF with regard to:• water penetration• capillary absorption• tensile strength• wear resistance• chloride penetration• homogeneity• porosity• incidences of micro cracking• water sorptivity• carbonation• freeze/thaw resistance.

16 InvestigationsThe manufacturing process was examined, including themethods adopted for quality control, and details obtainedon the quality and composition of the materials used.

Additional informationThe management systems of Fibertex A/S have beenassessed and registered as meeting the requirements ofDS EN ISO 9001 : 1994 by the Danish StandardsAssociation (Certificate Number 28) andDS EN ISO 14001 : 1996 (Certificate Number 214).

Bibliography BS 1881-202 : 1986 Testing concrete.Recommendations for surface hardness testing byrebound hammerBS 1881-207 : 1992 Testing concrete.Recommendations for the assessment of concretestrength by near-to-surface testsBS 1881-208 : 1996 Testing Concrete.Recommendations for the determination of the initialsurface absorption of concrete

3

In the opinion of the British Board of Agrément, the Formtex Controlled Permeability FormworkLiner is fit for its intended use provided it is installed, used and maintained as set out in thisCertificate. Certificate No 03/4038 is accordingly awarded to Fibertex A/S.

On behalf of the British Board of Agrément

Date of issue: 16th September 2003 Chief Executive

British Board of AgrémentP O Box No 195, Bucknalls LaneGarston, Watford, Herts WD25 9BAFax: 01923 665301

©2003For technical or additional information,contact the Certificate holder (seefront page).For information about the AgrémentCertificate, including validity andscope, tel: Hotline 01923 665400,or check the BBA website.

e-mail: [email protected]: www.bbacerts.co.uk

BS 5328-1 : 1997 Concrete. Guide to specifyingconcreteBS 5328-2 : 1997 Concrete. Method for specifyingconcrete mixesBS 5328-3 : 1990 Concrete. Specification for theprocedures to be used in producing and transportingconcreteBS 5328-4 : 1990 Concrete. Specification for theprocedures to be used in sampling, testing andassessing compliance of concreteBS 8000-2.2 : 1990 Workmanship on building sites.Code of practice for concrete work. Sitework with in-situand precast concreteDS EN ISO 9001 : 1994 Quality systems. Model forquality assurance in design, development, production,installation and servicingDS EN ISO 14001 : 1996 Environmental managementsystems. Specification with guidance for useEN 965 : 1995 Geotextiles and geotextile-relatedproducts. Determination of mass per unit areaASTM D 4533 : 1991 Test method for trapezoidtearing strength of geotextilesprEN 104-839 : 1997 Carbonation resistance

Conditions of Certification17 Conditions17.1 This Certificate:(a) relates only to the product that is described, installed,used and maintained as set out in this Certificate;(b) is granted only to the company, firm or personidentified on the front cover — no other company, firm orperson may hold or claim any entitlement to this Certificate;(c) has to be read, considered and used as a wholedocument — it may be misleading and will beincomplete to be selective;(d) is copyright of the BBA.

17.2 References in this Certificate to any Act ofParliament, Regulation made thereunder, Directive orRegulation of the European Union, Statutory Instrument,Code of Practice, British Standard, manufacturers’instructions or similar publication, shall be construed asreferences to such publication in the form in which it wascurrent at the date of this Certificate.17.3 This Certificate will remain valid for an unlimitedperiod provided that the product and the manufactureand/or fabricating process(es) thereof:(a) are maintained at or above the levels which havebeen assessed and found to be satisfactory by the BBA;(b) remain covered by a valid Danish Agrément; and(c) are reviewed by the BBA as and when it considersappropriate.17.4 In granting this Certificate, the BBA makes norepresentation as to:(a) the presence or absence of any patent or similarrights subsisting in the product or any other product;(b) the right of the Certificate holder to market, supply,install or maintain the product; and(c) the nature of individual installations of the product,including methods and workmanship.17.5 Any recommendations relating to the use orinstallation of this product which are contained orreferred to in this Certificate are the minimum standardsrequired to be met when the product is used. They donot purport in any way to restate the requirements of theHealth & Safety at Work etc Act 1974, or of any otherstatutory, common law or other duty which may exist atthe date of this Certificate or in the future; nor isconformity with such recommendations to be taken assatisfying the requirements of the 1974 Act or of anypresent or future statutory, common law or other duty ofcare. In granting this Certificate, the BBA does notaccept responsibility to any person or body for any lossor damage, including personal injury, arising as a director indirect result of the installation and use of this product.