Water proofing work of roof of Power House at Omkareshwar Power Station

Amount

Providing gola 75x75 mm in cement concrete 1:2:4 (1 cement : 2 coarse sand : 4 stone aggregate 10 mm and down gauge), including finishing with cement mortar 1:3 (1 cement : 3 fine sand) as per standard design : In 75x75 mm deep chase

Water proofing treatment over Roof, Wall, Chajjas, Balcony with Dimond Shield and Sealer coat or equivelent at leakage/seepage area consisting of (i) Surface preparation roughening of surface, opening of cracks in 'V' groove in size of 5mm x 10mm (WxD), filling of cracks with putty of Diamond shield with laying fiber glass mesh, Cleaning of surface by scrubbing with steel wire/Nylon brush. Removing all dust particles and washing with adequate water to cleanely. (ii) providing and applying 1st coat of diamond shield or equivelent (minimum thicknes 70-80 micron) (a two component flexible waterproof and protective modified mortar, dry powder 80% Chemical 20% acrylic resing having 30% solid contents) with mix proportion of paart 1 and 2 with proper mixing with laying of fiber alkaline resistant polymer). Allow the coating to air cure for minimum 2 Hrs. (Diamond shield or equivelent. After two hours minimum of 1st coat applying 2nd coat (minimum thickness 100 micron) of diamond shield ro equivelent with mix proportion of part 1 and 2 with proper mixing. Allow the coating to air cure for minimum 2 Hrs. Consumption of the diamond shield or equivelent should be @17.90 kg for 10sqm area. (After two coats of diamond sheld surface is to be cured properly minimum for 4 Hrs. before application of third coat). (iii) Providing and appplying 1st coat of sealer coat 50-60 micron (single component High build elastomeric, flexible, pure acrylic waterproofing membrans having solid content of 65%) and allow it to air cure for 4 Hrs. minimum. After two hours minimum of 1st coat applying 2nd and final coat 120-140 micron of sealer coat and allow it to air cure for 4 Hrs minimum. Consuption of Sealer coar should be @ 5.40 kg per 10 sqm area. (IV) The trated area should be cure with water for 48 hrs. by flooding the surface (V) The final appearance of the coating will be milky white. All above opeerations to be done in order.

Providing and fixing in position copper plate as per design for expansion joints.

Providing and laying in position bitumen hot sealing compound for expansion joints etc. : Using grade ‘A’ sealing compound.

KRISHNA ENGINEERING CONSTRUCTION COMPANY

E-VERVE DESIGN