Carrying out Waterproofing treatment at various building shops at AIESL Engineering Premises OAP Mumbai 400029

Removing the existing APP membrane layer/ cement mortar/cement concrete etc and carting away the same and from the actual place of work to any other site and making the site clear as directed. The debris will become contractor's property.

Providing and applying a multi-layer, liquid-applied, pure elastomeric cold-cured Poly Urethane waterproofing system of approved make. The scope of work includes: Surface Preparation by Mechanical cleaning of the substrate, Making angle fillets at all junctions using polymer-modified mortar of approved make, Priming: Application of epoxy-based primer at 150-200 ml/m², PU Membrane: Application of Flexi PU 270(I) of approved make by spray/ roller/ brush in 2 coats with total consumption 1.8-2.0 kg/m² to achieve the required 1.5mm DFTwith following Technical Parameters (ASTM C 836-18): 1. Property Specification Requirement 2. Hardness (Shore A) > 50 (Result: 68) 3. Non-Volatile Content Min 80% (Result: >85%) 4. Tensile Strength ≥ 2 N/mm² 5. Elongation at Break 400% 6. Crack Bridging No cracking at 3.2 mm 7. Adhesion to Concrete ≥ 1.5 N/mm²

Preparing the surface on both edges of the expansion joint by making it clean, dry, and sound up to a width of 200mm; treating minor surface imperfections by repairing with polymer-modified mortar. Supply and installation of a backer rod of suitable diameter, firmly compressed into the expansion joint gap to the required depth. Applying a 1mm thick layer of well-mixed tape adhesive with 20mm width on both sides along the joint on the prepared substrate, followed by Seal Tape (1mm thick & 200mm wide). Covering and sealing the edges of the seal tape with Tape adhesive with 10-15mm width and a thickness of ~1mm, followed by the immediate removal of masking tape to ensure a neat finish. The treatment shall be completed by fixing a 1.5mm thick x 300mm wide aluminium cover sheet over the joint as a protective covering, secured with appropriate mechanical fasteners on one side to allow for movement. All materials to be of approved make.

V Groove Treatment: Chasing and opening the joints/ cracks to form a V-shaped groove of appropriate size, thereafter, drilling along V groove at required spacing, fixing PVC nozzles and injecting nonshrink cementitious grout under pressure using a grout pump to fill pores. Cementitious grout is prepared by mixing cement slurry with Pidicrete AM or equivalent at a dosage of 225 grams per bag of cement. After grouting, cutting off the projecting nozzles and sealing with polymer-modified mortar. cleaning the surface and removing the loose particles with air blower, applying a bond coat of SBR Latex URP or equivalent and filling the V-groove using SBR Latex polymer modified mortar in a ratio 1:3 (1 cement: 3 sand) URP @ 10% weight of cement). All materials to be of approved make.

Providing and laying cement concrete floor (Indian Patent Stone) 40 mm to 65 mm thick to maintain required slope, P.C.C. (1:2:4) mix using 12.5 mm graded stone aggregate, adding Recron Fibres @ 900 gms pack/ per cubic meter of concrete and Pidiproof LW+ or equivalent @ 200 ml/cement bag laid in alternate bays trowelled smooth on top in neat cement and making lines on the top surface diagonally or square at spacing, curing for minimum 7 days, as directed etc. complete.