02/r128i

Universal Sealants (UK) Ltd
Roads and Bridges
Agrément Certificate
No 02/R128
BRITDEX MDP (TWO COAT) BRIDGEDECK
WATERPROOFING SYSTEM
Système d’étanchéité pour tablier de pontWasserdichtungsmittel für Brückentafel Department for Transport, Local Government and the Regions, WATERPROOFING SYSTEM,INCORPORATING A TWO- 1 Requirements
The requirements for Bridgedeck Waterproofing are given in the following (a) Manual of Contract Documents for Highway Works, Volume 1 (MCHW1) (b) BD 47 Waterproofing and Surfacing of Concrete Bridge Decks.
system for concrete decks ofhighway bridges in accordancewith the requirements of the Department for Transport, LocalGovernment and the Regions, 2 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, designer and contractors to address their obligations under these Regulations.
3 Description, 4 Delivery and site handling, and Sealants (UK) Ltd’s authorisedcontractors.
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).
3 Description
5 General
3.1 The Britdex MDP (Two Coat) Bridgedeck 5.1 The Britdex MDP (Two Coat) Bridgedeck Waterproofing System is satisfactory for use onconcrete bridge decks of at least 28 days old with Britdex MDP Primer — a two-part, solvent-free, highly-reactive methacrylate resin, comprisingPart A and Part B.
5.2 Installation of the system should only becarried out at a minimum air temperature of 4°C Britdex MDP Waterproofing — a two-part, solvent- free, methacrylate resin, comprising Part A andPart B.
6 Precautions during installation
Britdex MDP Tack Coat — a single-component, Health and Safety Data Sheets and a COSHH solvent-based, acrylic resin solution, orange risk assessment for the works should be deposited with the Highway Authority and be maintained Hardener Powder — 50% benzoyl peroxide with a solid plasticiser, for use in Britdex MDP PrimerPart B and Britdex MDP Waterproofing Part B.
7 Durability
Results of tests indicate that the Britdex MDP (Two manufactured by a batch-blending process. A Coat) Bridgedeck Waterproofing System will series of quality control checks is conducted on provide an effective waterproof layer to the each batch and on the combined components.
concrete bridge deck, provided it is not damagedduring subsequent resurfacing.
4 Delivery and site handling
4.1 The components are delivered as detailed in Table 1. When correctly stored, the unopenedcontainers have a shelf-life of at least six months.
8 General
8.1 Installation of the Britdex MDP (Two Coat)Bridgedeck Waterproofing System should be carried out only by contractors authorised andtrained by the Certificate holder.
25 kg Part A supplied in metal containers25 kg Part B supplied in metal containers 8.2 The Certificate holder is responsible for 25 kg Part A supplied in metal containers training and monitoring its authorised contractors 23.75 kg Part B supplied in metal containers to ensure that the system is installed in accordance with the BBA agreed Method Statement and thisCertificate.
9 Preparation
4.2 The components are classified under the 9.1 Imperfections in the concrete deck should be Chemicals (Hazard Information and Packaging for reinstated by the Highway Authority with a material agreed in consultation with the authorised containers bear the appropriate hazard warning label(s). Flashpoints and hazard classifications aregiven in Table 2.
9.2 The concrete deck should be clean, dry,and free from ice, frost, laitance, loose aggregate, oil, grease, moss, algae growth, dust and otherdebris, and where the adhesion to the concrete would be impaired, free from curing liquids, 9.3 The air temperature and relative humidity should be recorded. The installation should onlyproceed if air temperature is a minimum of 4°C and rising, and the bridge deck temperature is 10 Application
10.10 Britdex MDP Waterproofing is applied in two coats, first coat pigmented yellow and secondcoat pigmented grey. Each coat shall be applied 10.1 Britdex MDP Primer can be applied by to give a minimum wet film thickness of 1.2 mm to spray, roller or brush, at a coverage rate of ensure a minimum dry film thickness of 1 mm 0.20 kgm–2 to 0.40 kgm–2 dependent on the overall, and a total minimum dry film thickness of 2 mm overall, including peaks, arrises and 10.2 Britdex MDP Primer is supplied as Part A irregularities in the concrete deck.
and Part B. Immediately before use the hardener 10.11 The second coat shall be applied directly powder (percentage by weight calculated on total onto the first coat once it has cured. This will vary Part A and B components) is stirred into Part B and with temperature but is typically 20 minutes at 10.3 For spray application the quantity of 10.12 Where the waterproofing membrane is to according to the ambient temperature ie 2% at be joined to an existing Britdex MDP Waterproofing 30°C, 2.5% at 20°C, 3% at 10°C and 4% at membrane and at day joints, the new application 5°C. The two components Part A and Part B of the should be lapped onto the existing by a minimum primer are metered and mixed in an airless spray unit at a ratio of 1:1 by volume during application.
10.13 Where the existing membrane is clean, 10.4 For roller or brush application the quantity of additional preparation is not necessary.
hardener powder in Part B can be variedaccording to the ambient temperature ie 1.5% at 10.14 Where the existing membrane is dirty or 30°C, 2% at 20°C, 3% at 10°C and 4% at 5°C,.
contaminated, the surface should be cleaned using Part B is stirred into Part A of the primer at a ratio of 1:1 by volume or weight and mixed thoroughly, the material is then ready for application.
10.5 The primer can be overcoated with Britdex should be terminated into a primed chase when primer is fully cured and the surface is clean and 10.16 The integrity of the cured Britdex MDP Waterproofing membrane shall be confirmed for 10.6 Britdex MDP Waterproofing can be applied each coat application using a non-destructive by spray, roller or brush at a coverage rate of electronic test, prior to the application of the tack 1.5 kgm–2 per coat on a U4 surface. The coverage rate will vary with surface irregularity.
10.17 Any defects identified in each coat 10.7 Britdex MDP Waterproofing is supplied as application of the waterproofing membrane shall Part A and Part B. Immediately before use the be reinstated as in section 11 of this Certificate, and only the repaired areas re-tested for each coat, calculated on total Part A and Part B components) prior to the application of the tack coat.
is stirred into Part B and mixed thoroughly. Part B is 10.18 The Britdex MDP Tack Coat should be 10.8 For spray application the quantity of applied to the cured waterproofing membrane only in areas due to receive the additional according to the ambient temperature ie 2% at protective layer (APL) of sand asphalt or hot-rolled 30°C, 2.5% at 20°C, 3% at 10°C and 4% at 5°C. The two components Part A and Part B of thewaterproofing are metered and mixed in an airless 10.19 Britdex MDP Tack Coat can be applied spray unit at a ratio of 1:1 by volume during either by spray, roller or brush at a coverage rate of 0.1 kgm–2 to 0.4 kgm–2, to give a minimum wetfilm thickness of 0.3 mm on the cured membrane.
10.9 For roller or brush application the quantity of 10.20 The tack coat should be dry before the application of the APL or HRA. Drying time of the according to the ambient temperature ie 1.5% at tack coat will depend upon site conditions. Typical 30°C, 2% at 20°C, 3% at 10°C and 4% at 5°C, drying time for the tack coat is 30 minutes at Part B is stirred into Part A of the waterproofing at a ratio of 1:1 by volume or weight and mixedthoroughly, the material is then ready for 10.21 The APL or HRA should be applied without undue delay after the tack coat application.
11 Repair of defects
Pin/blow holes11.1 After application of each coat, any identified pin/blow holes should be overcoated with Britdex MDP Waterproofing membrane at an additional minimum wet film thickness of 1.2 mm (1) Test documents are detailed in the Bibliography. Numbers/letters in the tables refer to the sections/parts of the document.
11.2 Any blisters or damage should be made good by cutting back to sound material, theperiphery prepared if necessary as for lapping and a repair coat of Britdex MDP Waterproofingmembrane applied as in sections 10.10 and 10.11, ensuring a minimum peripheral lap of concrete deck, the exposed concrete should first becleaned and then re-primed.
12 Surfacing
Temperature of the surfacing when applied should exceed the minimum reactivation temperature of 80°C required for Britdex MDP Tack Coat.
The following is a summary of the technical investigations carried out on the Britdex MDP (Two Coat) Bridgedeck Waterproofing System.
Laboratory performance tests were carried out on the system which achieved the BD 47 requirements 14 Other investigations
Surfacing to waterproofing system BD 47 B4.2(k) 14.1 A site trial was carried out to assess the practicability of the installation and quality 14.2 The manufacturing process was examined, including the methods adopted for quality control, and details were obtained of the quality and Surfacing to waterproofing system BD 47 B4.2(l) (1) Test documents are detailed in the Bibliography. Numbers/letters inthe tables refer to the sections/parts of the document.
(a) are maintained at or above the levels whichhave been assessed and found to be satisfactoryby the BBA; BD 47 Waterproofing and Surfacing of Concrete (b) continue to be checked by the BBA or its Bridge Decks, Appendix B Certification Test Requirements for Waterproofing Systems onConcrete Bridge Decks (c) are reviewed by the BBA as and when itconsiders appropriate; and (d) remain in accordance with the requirements of Works, Volume 1, (MCHW1) Specification for the Department for Transport, Local Government 15.4 In granting this Certificate, the BBA makesno representation as to:(a) the presence or absence of any patent or 15 Conditions
similar rights subsisting in the product or any other (a) relates only to the product that is described, (b) the right of the Certificate holder to market, installed, used and maintained as set out in this supply, install or maintain the product; and (c) the nature of individual installations of the (b) is granted only to the company, firm or person product, including methods and workmanship.
identified on the front cover — no other company, 15.5 Any recommendations relating to the use or firm or person may hold or claim any entitlement to installation of this product which are contained or referred to in this Certificate are the minimum (c) has to be read, considered and used as a standards required to be met when the product is whole document — it may be misleading and will used. They do not purport in any way to restate the requirements of the Health & Safety at Work etc Act 1974, or of any other statutory, common lawor other duty which may exist at the date of this 15.2 References in this Certificate to any Act of Certificate or in the future; nor is conformity with Parliament, Regulation made thereunder, Directive such recommendations to be taken as satisfying the or Regulation of the European Union, Statutory requirements of the 1974 Act or of any present or Instrument, Code of Practice, British Standard, future statutory, common law or other duty of care.
manufacturers’ instructions or similar publication, In granting this Certificate, the BBA does not shall be construed as references to such publication accept responsibility to any person or body for any in the form in which it was current at the date of loss or damage, including personal injury, arising as a direct or indirect result of the installation and 15.3 This Certificate will remain valid for an unlimited period provided that the product and themanufacture and/or fabricating process(es) thereof: In the opinion of the British Board of Agrément, the Britdex MDP (Two Coat) BridgedeckWaterproofing System is fit for its intended use provided it is installed, used and maintained as setout in this Certificate. Certificate No 02/R128 is accordingly awarded to Universal Sealants (UK) Ltd.
On behalf of the British Board of Agrément For technical or additionalinformation, tel: 01923 665300.

Source: http://www.evolutioncivil.com.au/uploads/SprayWaterproofing/BritdexMDPBBACertificate.pdf