Repair of Power House Building (RCC Structure) after fire burst in Power House of PHEP-II, Sainj(Package No. C-637)

Amount

Providing and fixing double scaffolding system (cup lock type) on the exterior side, up to seven story height made with 40 mm dia M.S. tube 1.5 m Centre to Centre, horizontal & vertical tubes joining with cup & lock system with M.S. tubes, M.S. tube challies, M.S. clamps and M.S. staircase system in the scaffolding for working platform etc. and maintaining it in a serviceable condition for the required duration as approved and removing it thereafter .The scaffolding system shall be stiffened with bracings, runners, connection with the building etc wherever required for inspection of work at required locations with essential safety features for the workmen etc. complete as per directions and approval of Engineer-in-charge. The elevation area of the scaffolding shall be measured for payment purpose .The payment will be made once irrespective of duration of scaffolding.

Surface preparation by Roughening & Hacking of existing concrete surface with electrically driven Bushing Chisel for maximum up to 8-10 mm depth and disposal of malwa from site as per instruction of Engineer-in-charge.

Making 'V' groove of 5mm wide and 5mm deep over crack line by electrically operated angle grinder with diamond concrete saw blade and cleaning it by air blower as directed by Engineer-in-charge.

Sealing of exposed 'V' groove of 5mm deep and 5mm wide with solvent-free, moisture tolerant, thixotropic, two part structural adhesive and epoxy based repair mortar cum surface levelling mortar. Yield: 0.6 ltr/kg. Product requirements: Conforms to ASTM C 881-78, Type I, Grade 3, Class B+C; compressive strength > 60 N/mm2 (14 days) according to ASTM C 881; bond strength > 11 N/mm2 (7 days) according to ASTM C 882

Drilling and fixing injection packers in RC members including, Drilling Holes: Drilling holes in structural members at the intervals as per recommendation of engineer in charge. Cleaning of holes: Clean the holes by air blower prior to fixing nozzles. Fixing of Packers: Insert 12 mm dia., 50 to 75 mm long injection packers in cleaned holes with structural grade epoxy based adhesive. Cutting of Packers: Cut the packers by cut of wheel after completion of grouting without damaging structural elements.

Supply and apply a shrinkage free low viscous epoxy resin based injection grout. Yield: 0.88 ltr/kg Product requirements: Compressive strength >= 55 N/mm2 (7 days) according to FIP 5.12 and IS 9162-1979; Tensile strength > 30 N/mm2 (14 days) according to ISO 527; Bond strength> 10 N/mm2 (14 days) or concrete failure according to ASTM C 882.

Supply and apply of rust remover passivate or by brush in two coat. Consumption: 0.2 kg/m2/coat. Density: 1.01 Kg/l at 300C.

Supply and apply a epoxy based zinc rich rebar corrosion protection system. Consumption: 0.3 kg/m2/ in 2 coats

Providing extra reinforcement with TMT bars as per site design requirement including straightening. cutting, bending, placing in position, binding with G.i. wire of 18 in gauge etc. complete all respects. Additional reinforcement with adequate lap length & rings at required spacing shall be tied with existing reinforcement using binding wire or welded complete as per site requirement and directions of Engineer-in charge.

Providing & fixing rebar of required length & diameter with Epoxy based resin wherever required in RCC members including power drilling, cleaning of holes, then rebars should be inserted in holes that should be filled with epoxy to ensure the bond as per site requirement and directions of Engineer- incharge.( Excluding cost of steel). 16mm X160mm

Providing & fixing shear connectors of 12 mm dia TOR steel up to 160mm length with Epoxy resin in RCC members including power drilling. cleaning of holes, insertion of epoxy, placing shear connectors in position to ensure the bond as per site requirement and directions of Engineer-incharge.

Providing and mechanically applying (dry spray) high performance cementitious mortar on exposed/eroded concrete surface (vertical/overhead) as per technical specification. The average thickness will be upto 120 mm shall be applied in multiple layers, where single layer shall be kept maximum as 50 mm. (Complete finished item with all leads and lifts). The product performance shall carry guarantee for 3 years against erosion including free maintenance.

Supply and apply a pultruded CFRP plate for structural strengthening of RCC with epoxy having properties of E-modulus: 1.65x10 N/mm2; tensile strength >=2800 N/mm2.Product requirements: approved by Fib, technical report, bulletin 14; E-break > 1.8%; Glass Transition Temp > 100°C. Along with supply and apply a solvent-free, epoxy based, thixotropic, structural two part adhesive for plate bonding with epoxy based material having properties of Compressive Strength >90 N/mm2 (7 days) according to ASTM C579; Shear Strength>10 N/mm2 (7 days at 250C) according to FIP 5.15; Bond Strength >= 2.5 N/mm2 according to EN1542. Including Surface Preparation by grinding of concrete surface by electrically operated diamond cup wheel grinder, rounding off sharp edges to 25 mm radius and cleaning it properly as per direction and satisfaction of Engineer-in-charge Epoxy and CFRP Laminate shall be supplied by single manufacturer.

Supply and apply a stitched, one directional, high strength CFRP fabric in single layer over girders as per specification after surface preparation by rounding off sharp edges to 25 mm radius and cleaning it properly including thixotropic epoxy based impregnating resin / adhesive for low density fabric for base and top coat. Wrapping the CFRP fabric to RCC member at desired orientation using tamping rollers to avoid any air voids etc. and sprinkling sand over it as per direction and satisfaction of Engineer-in-charge.CFRP product used shall have minimum requirements: tensile strength (nominal) = 3800N/mm²; tensile E modulus = 2.4x10' N/mm²; elongation at break (nominal): 1.55%; fabric design thickness = 0.331mm.

STANDARD REHABILITATORS PVT.LTD