NIT for repairing and waterproofing of roof of Cable Gallery and construction of drain in blower at PPH Talwara.

Dismantling existing drains of different size cunnets, section only excluding recovery of all useable materials, stacking the same within 100 metre from site of dismantled works and disposal of all rubish off site of works. (a) House connection drains. (CSR 29.11(a))

First class burnt brick work laid in cement sand mortar 1:6 in first storey upto 4 metres above plinth level (CSR 11.4(i))

12.5 mm thick cement plaster 1:4 (CSR 15.9)

Waterproofing of wet areas ( Concrete/ Masonary Surface ) and any water retaining structures such as swimming pools, water tanks, Bathrooms, toilets, balconies, planters etc with high performance polymer modified cementitionous coating ( DR. FIXIT FASTFLEX / Equivalent ) to provide tough film build-up and highly elastic film formation, which accommodates thermal movements so as to provide seamless coating without any joints to prevents water leakage. The scope of work also includes surface prepration and cleaning, washing and removing dust,dirt and loose particles from concrete / masonary surface complete in all respects. (CSR 13.92)

Centering and shuttering for faces of walls, partitions, retaining walls and the like (vertical or battering including attached pilasters buttresses etc. (CSR 9.2)

Dismantling concrete (d) Cement Concrete plain 1:2:4 mix (CSR 8.6(d))

Cement concrete 1:4:8 (a) with stone ballast 20mm gauge (ii) mixing by mechanical means using concrete mixer volumetric type (CSR 10.11(a)(ii))

Filler Joint (iii)Providing and fixing in position 20 mm thick premoulded joint filler in expansion joint for fixed ends of simply supported spans not exceeding 10 m to cater for a horizontal movement upto 20 mm, covered with sealant complete as per drawing and technical specifications (CSR 22.15(iii))

Chipping of unsound/weak concrete material from slabs, beams, columns etc. with manual Chisel and/ or by standard power driven percussion type or of approved make including tapering of all edges, making square shoulders of cavities including cleaning the exposed concrete surface and reinforcement with wire brushes etc. and disposal of debris for all lead and lifts all complete as per direction of Engineer-In-Charge.

Providing surface treatment to external / internal wall with water resistant grade, anti fungal, anti rusting, antifoaming, high percentage acrylic binder washable surface with two coats to be provided with spatula over one coat cement primer including preparation of surface with water resistant grade match colour complete as per specifications and to the entire satisfaction of engineer- in- charge. (CSR 16.68)

Providing and applying crystalline mortar by mixing in the ratio of 4.5:1(4.5 parts crytalline mortar: 1 part water) for the treatment of faulty construction joints,cracks, tie rod holes and spalled & honeycombed surface of RCC underground structures like basement, water tanks, bridge deck etc. to ensure water tightness. The crystallie mortar shall conform to the EN 1504-3 having compressive strength Class R4 ?45 MPa and adhesive bond strength Class R3?1.5 MPa. The work shall be carried out all complete as per specification and the direction of the Engineer-In-Charge. The Product performance shall carry guarantee for 10 years against any leakage For sealing cracks and faulty construction joints , routed out/making U-shape groove size 25x25mm and then primed the area with integral crytalline slurry @ 0.05kg/running metre and while the surface is tacky filled the groove upto surface with crytalline mortar @1.50kg /running meter. Once crytalline mortar is touch dry then finally applied two coats of integral crytalline slurry @ 0.05kg/running meter per coat. (CSR 13.99)