Indian Institute Of Technology Tender

Providing and laying water proofing treatment to vertical and horizontal surfaces of depressed portions of W.C., kitchen and the like consisting of: (i) Ist course of applying cement slurry @ 4.4 kg/sqm mixed with water proofing compound conforming to IS 2645 in recommended proportions including rounding off junction of vertical and horizontal surface. (ii) IInd course of 20 mm cement plaster 1:3 (1 cement : 3 coarse sand) mixed with water proofing compound in recommended proportion including rounding off junction of vertical and horizontal surface. (iii) IIIrd course of applying blown or residual bitumen applied hot at 1.7 kg. per sqm of area. (iv) IVth course of 400 micron thick PVC sheet. (Overlaps at joints of PVC sheet should be 100 mm wide and pasted to each other with bitumen @ 1.7 kg/sqm).

Providing and applying plaster of paris putty of 2 mm thickness over plastered surface to prepare the surface even and smooth complete.

Distempering with 1st quality acrylic distemper (ready mixed) having VOC content less than 50 gram/litre, of approved manufacturer and of required shade and colour all complete to achieve even shade and colour : New work (two or more coats) over and including water thinnable priming coat with cement primer having VOC content less than 50 gram/litre

Dismantling old plaster or skirting raking out joints and cleaning the surface for plaster including disposal of rubbish to the dumping ground within 50 metres lead.

Repair to plaster of thickness 12mm to 20 mm in patches of area 2.5 sqm and under, including cutting the patch in proper shape, raking out joints and preparing plastering the wall surface with white cement based polymer modified self curing mortar, including disposal of rubbish, all complete as per the direction of Engineer-In-Charge.

Dismantling, Chipping & Surface Preparation: Dismantling the Brick wall, Removing & Hacking of damaged concrete Carefully by low impact high frequency hammer OR by manual chipping without damaging the existing concrete. Grinding concrete substrate, cleaning it with wire brush, removing oil, laitance if present, breaking upto required level to open up corroded reinforcements wherever required.

Anti-Corrosive treatment on reinforcement / Replacing damage reinforcement: Providing and Applying anti-corrosive treatment to the exposed corroded steel bars using epoxy zinc rich. Proper cleaning of the corroded bars will be done using Rust Remover before application of zinc rich primer. The primer shall be an active type having zinc content of greater than 90% in dry film state which is capable of negating the generation of incipient anodes in the areas surrounding the repairs. The product shall have mix density not less than 2.25 kg/litre. Replacing the reinforcement wherever required

Repair of spalled concrete: Patch Repair with High Grade, Single Component, Dual Shrinkage compensated, Fibre Reinforced, Pre Packed Cement Based Repair Mortar that achieves compressive strength minimum of 45MPa at 28days as per as tested and capable of applying 50mm thick in single layer initially by hand and final finishing using trowel for thickness required as per site condition over a epoxy rasin bonding agent to ensure proper bonding of old and new concrete

Epoxy Grouting: Sealing of Cracks: Providing and Sealing the cracks, in the concrete surface, after opening the cracks using suitable tools or saw cut in the crack, and cleaning the interior sides of the crack using sharp tools to remove all loose materials, using two component, high strength, non-sag, epoxy compound Fixing NRV nozzles in honey comb / damaged area and along crack lines at required spacing after drilling using mechanical tools and plugging it using high strength, non-sag, epoxy compound complying with ASTM C881 Type I, Grade 3, Class B & C and formulated to achieve adhesive bond strength with concrete substrate an average of 1 MPa at 7 days or concrete failure when tested to ASTM D4541; Compressive strength in excess of 40 MPa at 1 day & 60 MPa at 7 days when tested as per BS: 6310 Pt 2 Injection Of Low Viscous Epoxy Resin: Grouting the cracks after fixing the injection ports at predetermine locations with the help of suitable injection grouting pumps at suitable pressures using twocomponent, high strength, low viscous (350 cps @ ambient temperatures) epoxy injection resin system having minimum pot life of 30 minutes at ambient temperatures, achieves compressive strength higher than 55 MPa at 1 day & 65 MPa at 7 days; Flexural strength higher than 55 MPa at 7 days; slant shear bond strength higher than 15 MPa in 7 days

Application of Epoxy Bonding Agent: Applying a single coat of two component solvent less epoxy resin based bonding coat complying to ASTM C881 Type 2, Grade 2, and Class B &C having a open time of 6 hours and shall exceed the tensile strength of concrete in terms of its adhesive bond strength using brush or roller to ensure bond between old concrete & new concrete

Carbon Fibre Wrapping - Column and Beam: Strengthening structural elements with Single layer of carbon fibre sheet reinforcement Surface preparation: Grinding concrete substrate, cleaning it with wire brush removing oil, laitance if present. Profiling: Applying compatible primer on prepared substrate, Filling the holes and uneven surface with high strength epoxy putty Wrapping: Applying first coat of saturant, cutting the GSM carbon fiber sheet to size, wrapping the fiber sheet to structural element at desired orientation using proper roller to avoid any air voids etc. Apply the second coat of saturant ensuring total saturation of the Carbon Fiber sheet. Sand pasting: Paste the river sand on it to make surface rough to take any further finishes.

Restoration of Brick work and Cover Plaster: Restoration of brick wall as earlier and 12mm plaster on Column/Beam after Carbon Fibre wrapping