Rehabilitation of various structural elements of viaduct portions of blue line from km (-)6.23 (KDSW) to km 0.0 (KDMI) and from km 16.45 (KMUK) to km 25.135 (KKVS) of Metro Railway, Kolkata.

including strutting, propping etc. and removal of form for // Lintels, beams, plinth beams, girders, bressummers and cantilevers 5.22A.6 4500.00 Kg 107.85 485325.00 (-) 24.00 368847.00 Description:- REINFORCEMENT CEMENT CONCRETE // STEEL REINFORCEMENT // Steel

binding all complete above plinth level. // Thermo-Mechanically Treated bars of grade Fe-500D or more. S.No. Item Item Qty Qty Unit Unit Rate Basic Value Escl.(%) Amount Bidding Code Unit Above/ Schedule () B-Non-DSR Items 431207296.19 Below/P ar

1 METRO-KOL-HQ-ENGG/METRO RAILWAY 1 Description:- Injecting and grouting low viscous moisture insensitive epoxy grout "CONBEXTRA EP10 (M)"or equivalent material manufactured by SIKA/FOSROC/BASF/NORMAT/SUNANDA etc. into RCC elements such as RCC walls, columns, beams, ceilings etc. including drilling holes; inserting packers inside and mixing the grout in a mixer with mechanical stirrer as per the manufacturer's specifications and injecting the mix by using suitable gun/pump at required pressures with all contractor's materials, labour, tools and tackles, taxes etc. complete. The grout should provide good general chemical resistance with 7 days compressive strength of at least 80N/mm². It shall have a density of 1060 kgs per cum and shall have compressive strength of 60N/mm² at 7 days as per ASTM D695 and tensile strength 20 N/mm² at 7 days and flexural strength of 45 N/mm² at 7 days as per 6319 part 4. Rates are inclusive of providing sealing material around the nipples or any other accessories for the packers etc., cutting of protruded ends of packers after grouting and setting of the same, cleaning etc.

Description:- Proving and applying Penetrating, corrosion inhibiting, impregnating coating for hardened concrete surface. Product shall be amino alcohol and transparent in colour. The product

equivalent international labs. The material shall be applied on concrete surface by brush or spray with minimum consumption of 0.5kg/sqm.The material shall posses below properties colour : Transparent Ph:11 Viscosity: 25cps Rates of item shall include cost of scaffolding, machine, equipment and all work shall be completed as per instruction of Engineer In-charge.

Description:- Repairing of damaged RCC members like columns, slabs, RCC wall, beams etc. by polymer modified mortar by providing and applying bonding agent "Nitobond AR" or equivalent by manufacturer of repute by followed by applying Dual Shrinkage compensated, fibre reinforced, single component, polymer modified, cementition, repair mortar system supplied as a ready to use blend of dry powders, which requires only the addition of clean water to produce a highly consistent,

NORMAT/SUNANDA or by manufacturer of repute. The mortar should achieve compressive strength > 50 Mpa at 7 day (BS 6319 Part II) and >70Mpa at 28 days Flexural Strength 9 N/mm2 at 28 days (BS 6319 part 3), Tensile strength 4 N/mm2 at 28days (BS 6319 part 7) at a water cement ratio of 0.16. Drying shrinkage (ASTM C 157-93) for 7days < 300 micro strain and for 28 days <500 microstrain. Permeability (DIN 1048 part 5) < 5mm. Rapid chloride permeability(AASHTO 277-93) <

Description:- Painting & finishing with water based aliphatic acrylic anti-carbonation coating (bond by penetration of the polymeric binder into the concrete substrate) of approved brand and manufacture at all locations & levels, prepared and applied as per manufacturer's specifications including preparation of surface by filling of pin holes with cement putty, honey-combing with mortar, grinding of edges (if required) etc. complete as per manufacturer's specification. The material should have no electrostatic charge and should be Zero Volatile organic compound (VOC), weather proof, advanced anti-algae and fungal resistance, excellent dirt pickup resistance and should be applied in two or more top coats over exterior acrylic based primer made for anti

complete as per manufacturer's specifications, IRC-80 and as per directions of Engineer-in-Charge. The rate comprises of all additional expenditure on account of steel plate of size (50mmx50mmx0.25mm thick) per 10 Sqm area Supply and apply one part, acrylic based plasto- elastic, UV Stable, crack-bridging anti carbonation protective coating system of 200 microns DFT with Acrylic Primer Primer: Sikagard-552 IN Primer W or equivalent Consumption: 0.25 kg/m2. Coating: Sikagard-550 W Elastic or equivalent. Consumption: 0.30 kg/m2/coat. System requirements: Permeability to carbon dioxide as equivalent air layer thicnkess SD CO2>140m permeability to water vapour as equivalent air layer thicnkess SD H2O<2m Elongation : 200% Tensile Strength >1.5 Mpa Negligible Chloride Ion Penetration crack bridging capacity: No failure at

Description:- Patch Repair works -Exposing of existing damaged RCC columns, beams, slabs, walls, raft etc. including plaster 6mm beyond inner reinforcement carefully by means of chisel and

(where reinforcement are visible) by wire brush/compressed air, erecting horizontal platforms at working levels to collect the debris, including scaffolding, stacking the debris and carting away outside the premises with contractor's own transportation and disposal etc. Rate includes cost of all materials, labour, tools & tackles, carrying of all debris materials, taxes etc. complete in all respects.

METRO-KOL-HQ-ENGG/METRO RAILWAY

and applying 2 coats of rust remover "Rusticide" / "Rustoff 100" / "Reebaklen RR" or equivalent material manufactured by SIKA / FOSROC / BASF / NORMAT / SUNANDA or manufacturer of repute to the exposed reinforcement bar, scrapping reinforcement bars again and applying polymer/epoxy coating of "Polyalk Fixoprime" or equivalent material manufactured by SIKA / FOSROC / BASF / NORMAT / SUNANDA or manufacturer of repute as per manufacturer's specification, tying/welding/fixing of missing/misplaced/corroded reinforcement at required position by U clips, binding wires etc. Rate includes cost of all materials, labour, tools and tackles, scaffolding as required, taxes etc. complete in all respects.

Description:- Protective coating for reinforcement- Supply and apply two component low solvent, zinc rich epoxy resin based protective coating and anti-corrosive primer for steel. Product: Sika

below: Density: 2.15kg/L (PartA+Bmixed,+27°C), Total Solid content :76 % Minimum Zinc Content in mix :, 66 % Minimum Zinc Content in dry Film:85%, Tensile Adhesion:>2Mpa as per ASTMD4541 Tack Free in 20 min at 30 Degree, Consumption: 0.150-0.250kg/m2

Description:- Jacketing with Micro Concrete-Jacketing of RCC elements such as column, beams, pedestals, end blocks of PSC Girders etc with shrinkage compensated cementitious micro concrete such as "Polycrete"/"RENDEROC RG SPL" or equivalent material manufactured by SIKA/FOSROC/BASF/NORMAT /SUNANDA etc to be poured in the shuttering as per manufacture's specification including mixing waterproof shuttering, pouring, consolidating, scaffolding etc. The

importantly, the cured micro-concrete shall contain no metallic aggregates, or chlorides and shall be shrinkage compensated in the plastic state. The unrestrained expansion shall be between 1-4%. The flexural strength shall not be less than 8 N/mm2 @ 28 days. Rate include cost of all materials, labour, tools and tackles, taxes etc. complete. ( The item shall be paid on actual consumption of micro concrete only)

Description:- Rebar Grouting-Providing and fixing in position rebar in concrete with FIS EM390S Fisher chemical make / Lokfix E-Series FOSROC Chemical / HILTI-RE500-V3 or similar supplied by the

specifications and as directed and instructed by the engineer. The rate includes drilling 10mm dia holes to the depth of 100mm in concrete with drilling machine, scaffolding, tools/tackles, injecting specified manufacturer's grout material approved by the engineer etc. complete for all floor/levels/ all heights except the cost of rebar which shall be paid separately under relevant schedule.

Description:- Structural Strengthening with Carbodur Rod & Epoxy Adhesive - Supply and apply a pultruded 10 mm dia. CFRP Rod for structural strengthening of RCC by creating groove and filling and fixing with Sika CarboDur BC-10/Nitorod CRS or equivalent by manufacturers of repute having following properties: E-modulus: 1.48x105N/mm2; Tensile strength>=2900N/mm2; Glass TransitionTemp>100oC along with supply and apply a solvent-free, epoxy based, thixotropic,

manufacturers of repute having properties: Compressive Strength >90 N/mm2 (7 days) according to ASTM C579; Shear Strength >10N/mm2 (7daysat250C) according to FIP5.15; BondStrength>=2.5N/mm2 according to EN1542. Including Surface Preparation by creating groove of size 15mmx15mm cutting of concrete surface by electrically operated diamond cup wheel cutter and cleaning it properly as per direction and satisfaction of Engineer-in-charge Epoxy and CFRP Rod shall be supplied by single manufacturer.

Description:- Structural Strengthening with Carbon Fiber Wrap 600 GSM & Epoxy Adhesive -Supply and apply a stitched, one directional, high strength 600 GSM CFRP fabric in single layer over RCC member with wet application process 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 Sikadur 330 and Sikadur 300/Nitowrap CWS (CFRP Fabric) Nitiwrap 30

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. Epoxy and CFRP shall be from same manufacturer, Epoxy shall have durability test report from reputed Indian laboratories such as NABL-accredited labs or equivalent international labs. CFRP product used shall have minimum requirements: Tensile strength (nominal) = 4900N/mm2; Tensile E - modulus = 250000 N/mm2; elongation at break (nominal): 2.1%; fabric design thickness = 0.330 mm.