Bhabha Atomic Research Centre Tender

Removing bitumen based waterproofing treatment from terrace chajjas, parapets etc, and disposal within 50m. Note : (1) All surfaces shall be made free from gross irregularities, loose, unsound or foreign material such as dirt,water, grease, oil, release agents, lacquers, or any other condition that would be detrimental to adhesion of the primer and membrane. This requires careful preparation of existing horizontal and vertical substrates; cracks are filled, expansion joints,flashings(if any) are prepared. Substrates and penetrations shall be prepared to rigorous industry standards, and may require scarifying, sandblasting or grinding in some cases to achieve a suitable substrate and the cost of the above work shall be deemed to be included in the quoted rate. (2) Removal of any other membrane type waterproofing will also be measured and paid under this item.

Providing Second Skin on the terrace using Polyester - Resin based waterproofing system with special non woven polyester fleece minimum 165 GSM as a reinforcement for arresting Water Penetration in the Building as described below:- Providing and applying (Pre Measured Packed) 2 components solvent free, highly penetrative, excellent adhesion property nearly to all substrates, Epoxy Based Primer on the clean and grinded surface. The substrate must be dry (in concrete, the residual moisture in the upper 2 cm must be 5 %), sound and free from any material that would hinder adhesion. Mix component A (Blue component) into component B ( Yellowish component) thoroughly in propotion 1 : 0.43 by weight with the help stirring stick. The mixture should be a uniform colour, free from streaks. Apply the primer evenly with roller and immediately lightly sprinkle silica sand (0.4 – 0.8mm) at the rate of minimum 100 grams/SqM over the wet primer. The primer should be completely dry for further application of liquid applied polyester resin based membrane. The Consumption depending on the nature and condition of the substrate for priming ~ 300 – 500 gm/SqM including cost of material, labour, tools & plants etc. complete. Providing and Applying (Pre Measured Pack) 3 components cold liquid applied waterproofing system based on Unsaturated Polyester Resin and special needle punched non woven, system compatible polyester fleece of minimum 165 GSM as reinforcement. The cold liquid applied reinforced system is highly crack bridging, UV stable, immediate rain proof. Add Catalyst powder to Polyester resin and mix thoroughly if atmospheric temp exceeds 25 Degree Centigrade then add inhibitor and mix thoroughly until no streaks are visible. Applying Approx. 2/3 of the waterproofing mix material to the substrate uniformly and Fleece is rolled with roller, removing air bubbles and allowing overlap of 5cm. The remaining 1/3 of the waterproofing mix material is poured onto the surface until complete saturation is achieved. The total system of waterproofing for material and components shall be from single manufacturer. The system is totally wet on wet and no time lag should be kept during the total laying of the system. The minimum consumption of the material shall depend on the nature and condition of the substrate @ 2.6 – 3.3 Kg/SqM. The rate shall including cost of material, labour, tools & plants etc. complete. The tensile strength of the complete system/ membrane shall be minimum 6.25 N/Sqmm and Elongation with fleece reinforcement shall be minimum 74 % . The Tear Resistance of the membrane shall be minimum 32 N/Sqmm and adhesive strength shall be minimum 2.5 N/Sqmm etc. Note : (1) It is deemed that the Contractor has visited the site and has fully understood the site conditions.The Contractor shall provide 10 years Performance guarantee for the complete waterproofing work. (2)The above work shall comply with complete waterproofing system of Single Manufacturer meeting all the technical specifications as per relevant codes and standards, even if the same is not explicitly mentioned in the item description, and complete material components as per manufacturers specifications shall be used in the work.The quoted rate shall be deemed to include the cost of complete system specified by the Single Manufacturer. (3) The work will also include sealing of all pipe inserts/embedded plates,protrusions, flashings with the above Waterproofing system and the cost of the same shall be deemed to be included in the quoted rate. (4)The quoted rate shall include the cost of repairing the unsound portions/cracks with polymer modified mortar/concrete wherever necessary and the cost of the same shall be deemed to be included in the quoted rate. (5) Tentative/suggested model & make for the guidance of bidder(s): Kemperol V210 system of M/s Kemper System (India) Pvt. Ltd. or approved equivalent. (6) Mode of Measurement: Net area which is covered by the complete system shall be measured for payment.

Providing Second Skin on the Vertical Wall with Highly Flexible, Solvent - Free, Single - Component Polyurethane based Waterproofing Coating having very good SRI Index / UV Stable system for arresting Water Penetration in the Building. Providing and applying (Pre Measured Packed) silver grey coloured 2 components solvent free, odourless, excellent adhesion property Epoxy-based Primer on the clean and grinded surface. The substrate can be slightly moist (in concrete, the moisture must be 5 %), sound and free from any material that would hinder adhesion. Mix component A into component B in ratio 6:1 by weight thoroughly with stirring stick. The mixture should have uniform colour, free from streaks. Apply the primer evenly with roller. The primer should be completely dry for further application of liquid applied polyurethane based membrane. The Consumption depending on the nature and condition of the substrate for priming ~ 250 – 400 gm/sqm. The rate shall including cost of material, labour, tools & plants etc. complete.Providing and Applying cold liquid applied waterproofing based on highly flexible solvent free single component Polyurethane system. The cold liquid applied coating is UV stable, Solvent free system. Stir the material before use. Over the prime substrate applying 2 coats of waterproofing mix material with help of roller and brush. Each coat should be applied after the interval of atleast 12 Hrs. The total system of waterproofing for material and components shall be from single manufacturer. The Total Consumption of cold liquid applied waterproofing based on highly flexible solvent free single component Polyurethane system depending on the nature, porosity and condition of the substrate ~ 0.7 – 0.9 kg/sqm excluding primer. The rate shall including cost of material, labour, tools & plants etc. complete. Note : (1) It is deemed that the Contractor has visited the site and has fully understood the site conditions.The Contractor shall provide 5 years Performance guarantee for the complete waterproofing work. (2)The above work shall comply with complete waterproofing system of Single Manufacturer meeting all the technical specifications as per relevant codes and standards, even if the same is not explicitly mentioned in the item decription, and complete material components as per manufacturers specifications shall be used in the work.The quoted rate shall be deemed to include the cost of complete system specified by the Single Manufacturer. (3) The work will also include sealing of all pipe inserts/embedded plates,protrusions, flashings with the above Waterproofing system and the cost of the same shall be deemed to be included in the quoted rate. (4)The quoted rate shall include the cost of repairing the unsound portions/cracks with polymer modified mortar/plaster/concrete wherever necessary and the cost of the same shall be deemed to be included in the quoted rate. (5) Tentative/suggested model & make for the guidance of bidder (s): Kemco pox 2k primer and Kemperol 1k system of M/s Kemper System(India)Pvt. Ltd. or approved equivalent. (6) Mode of Measurement: Net area which is covered by the complete system shall be measured for payment.