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 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

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

general chemical resistance with 7 days compressive strength of at least 80 N/mm². It shall have a density of 1060 kgs per cum and shall have compressive strength of 60 N/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.

METRO-KOL-HQ-ENGG/METRO RAILWAY Description:- Proving and applying Penetrating, corrosion inhibiting, impregnating coating for

shall have performance test report from reputed labs like Mott MacDonald and BRE. 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 Viscocity : 25 cps Rates of item shall include cost of scaffolding, machnie, equiment and all and work shall be complete as per instruction of Engineer Incharge

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,

SIKA/FOSROC/BASF/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

water cement ratio of 0.16. Drying shrinkage (ASTM C 157-93) for 7 days < 300 microstrain and for

(AASHTO 277-93) < 1800 coulombs. Rate includes cost of all contractor's materials, labour, tools and tackles, taxes etc. complete.

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 Consumption: 0.25 kg/m2. Coating: Sikagard-

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 3 mm.

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.

Description:- Patch Repair works-Washing and drying the exposed concrete surfaces, providing 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

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

+27 °C) Total Sold content :76 % Minimum Zinc Content in mix : 66 % Minmum Zinc Content in dry Film : 85% Tensile Adhesion : > 2Mpa as per ASTM D4541 Tack Free in 20min at 30 Degree Consumption : 0.150-0.250 kg/m2

METRO-KOL-HQ-ENGG/METRO RAILWAY 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

specification including mixing waterproof shuttering, pouring, consolidating, scaffolding etc. The micro concrete in the flowable consistency should achieve a compressive strength of not less than

importantly, the cured micro-concrete shall contain no metallic aggregates, or chlorides and shall be shrinkage compensated in the plastic state. The unrestrained expansion shal 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 CFRP Rod for structural strengthening of RCC by creating groove and filling and fixing with Sika CarboDur BC-10 having properties of E-modulus: 1.48x105 N/mm2; tensile strength >=2900 N/ mm2. Product requirements: approved by Fib, technical report, bulletin 14; Glass Transition Temp >

adhesive for fixing rod with Sikadur-30 LP (IN) 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 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 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

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 durabity test report from EMPA reputed international swiss based lab. CFRP product used shall have minimum requirements: Tensile strength (nominal) = 4900N/mm2; Tensile E - modulus =