DETAILED TECHNICAL SPECS - WATERPROOFING

1 DETAILED TECHNICAL SPECS - WATERPROOFING . PART 1 GENERAL. SUMMARY. A. Section Includes: Furnishing of all labour, materials, services and equipment necessary for the supply and installation of WATERPROOFING systems (as described in the BOQ) to concrete substrates, above-grade, on either dry or wet side of substrates, as indicated on drawing and as specified herein. REFERENCES. A. Applicable Standards : The following standards are referenced herein. 1. American Society for Testing Materials (ASTM). 2. Army Corps of Engineers (CRD). 3. NSF International (NSF). 4. Bureau of Indian Standard (IS) - 2720. SYSTEM DESCRIPTION. A. Catalytic In-depth Crystalline WATERPROOFING : Blend of portland cement, fine treated silica sand and active proprietary chemicals.

2 When mixed with water (or a flexibilizer) and applied as a coating layer, the active chemicals in the coating layer penetrate the concrete substrate and cause a catalytic reaction which generates a non-soluble crystalline formation of dendritic fibers deep within the pores and capillary tracts of concrete . This process causes concrete to become permanently sealed against the penetration of liquids from any direction. Two product versions of Catalytic In-depth Crystalline WATERPROOFING are available, Cementitious and Flexible-Matrix. The Flexible-Matrix version is preferred over the Cementitious version, due to its elongation characteristics and additional virtue of forming a membranous barrier around the concrete to which it is applied.

3 B. Membrane WATERPROOFING : (1) Pre-fabricated APP/SBS Modified Polyester Re-inforced Bituminous Membrane: having UV resistance, underground ground-chemical resistance, high melting points, flexible and elastic with high adhesive strength. The membrane shall be reinforced with a layer of non-woven polyester fabric of minimum 180 g/sqm or composite reinforcement of minimum of 175 g/sqm and reinforced with glass fibre grill of 8 g/sqm. The upper surface is finished with calibrated granules of 1 mm, pressed mechanically into the bitumen. The under surface is finished with a polyethylene foil of 12 micron thickness. The total membrane thickness is 4mm and minimum weight to kg/m including coating with compatible primer of bituminous base and torch application with overlap of 70 - 100 mm wherever required.

4 The reinforcement provided shall be CONSTRUCTION SPECIFICATIONS INSTITUTE (CSI) FORMAT 1. DETAILED TECHNICAL SPECS - WATERPROOFING . able to withstand the traffic flow density and shall include necessary protection layer of either colour slates / granules / 18 mm thick thermocole / aluminium foil as approved by consultants, etc. (2) Liquid-applied, Water-Based, Elastomeric Polyurethane Membrane : having UV. resistance, underground ground-chemical resistance, high melting points, flexible and elastic with high adhesive strength. The membrane shall be reinforced with a layer of non-woven polyester fabric of minimum 40 g/sqm. The upper surface shall be finished with 8-12 sieve quartz sand which shall be sprinkled on to the final wet layer of the liquid applied membrane, to provide keying' to the subsequent protective cementitious layer of concrete screed / plaster as specified in the BOQ.

5 The total membrane thickness shall be as specified by the manufacturer's TECHNICAL literature but not less that mm and shall be applied in 3 coats. C. Acrylic Polymer-Modified Flexible Cementitious Membrane / Coating : having UV resistance, underground ground-chemical resistance, high melting points, flexible and elastic with high adhesive strength. The membrane shall be reinforced with a layer of non-woven polyester fabric of minimum 30 g/sqm. The Acrylic Polymer-Modified Flexible Cementitious Membrane / Coating shall be protected with a subsequent protective cementitious layer of concrete screed / plaster in thickness as specified in the BOQ.

6 The total coating thickness shall be as specified by the manufacturer's TECHNICAL literature but not less that mm and shall be applied in 2 - 3 coats. SYSTEM PERFORMANCE REQUIREMENTS. A. Testing Requirements: The WATERPROOFING systems shall be tested in accordance with the following standards and conditions, and the testing results shall meet or exceed the performance requirements as specified herein. B. Independent Laboratory: Testing shall be performed by an independent laboratory meeting the requirements of ASTM E 329-95 and certified by the United States Bureau of Standards. Testing laboratory shall obtain all concrete samples and WATERPROOFING product samples.

7 C. Permeability: Independent testing shall be performed according to Army Corps of Engineers CRD-C48-73 Permeability of concrete . 1. concrete samples (treated and untreated) to have design strength of Mpa and thickness of 50 mm. No. admixtures permitted. 2. Coatings / Membranes to have maximum thickness as specified in this document / in the BOQ. 3. Samples to be pressure tested to Mpa ( m head of water). 4. Treated samples shall exhibit no measurable leakage. E. Chemical Resistance: Independent testing shall be performed according to ASTM C 267-77. Chemical Resistance of Mortars and ASTM C 39-86 Compressive Strength of Cylindrical concrete Specimens.

8 CONSTRUCTION SPECIFICATIONS INSTITUTE (CSI) FORMAT 2. DETAILED TECHNICAL SPECS - WATERPROOFING . 1. concrete samples (treated and untreated) to have design strength of Mpa. No admixtures permitted. 2. Coatings / Membranes to have maximum thickness as specified in this document / in the BOQ. 3. Untreated and treated specimens to be immersed for a minimum of 84 days in following chemical solutions: hydrochloric acid ( pH), brake fluid, transformer oil, ethylene glycol, toluene, caustic soda. 4. Treated specimens shall exhibit no detrimental effects after exposure. F. Potable Water Approval: Independent testing shall be performed according to NSF Standard 61.

9 And approval for use of WATERPROOFING material on structures holding portable water shall be evidenced NSF certification. SUBMITTALS. A. General: Submit listed submittals in accordance with conditions of the Contract and with Division 1 Submittals Procedures Section. B. Product Data: Submit product data, including manufacturer's specifications, installation instructions, and general recommendations for WATERPROOFING applications. Also include manufacturer's certification or other data substantiating that products comply with requirements pf Contract Documents. C. Test Reports: Submit for acceptance, complete test reports from approved independent testing laboratories certifying that WATERPROOFING system conforms to performance characteristics and testing requirements specified herein.

10 D. Manufacturer's Certification: Provide certificates signed by manufacturer or manufacturer's representative certifying that the materials to be installed comply in all respects with the requirements of this specification , and that the specialized executing WATERPROOFING agency is qualified and approved to install the materials in accordance with manufacturer's product data. E. Manufacturer's Field Report: Provide copy of report from manufacturer's representative confirming that the surfaces to which WATERPROOFING material is to be applied are in a condition suitable to receive same. QUALITY ASSURANCE. A. Manufacturer: Provide products of manufacturer with no less than 20 years experience in manufacturing the WATERPROOFING materials offered by them for the required work.