Structural Civil Repairs in Critical Facility Reactor complex

Amount

Dismantling old Plaster or skirting upto 40 mm thick, raking out joints and surface cleaning with water jetting, disposal of debris to the dumping ground within 150 metres lead.

Dismantling brick bat coba cement based water proofing over roof and chajjas carefully without damaging adjacent structures including lowering and stacking of materials and dispoal of unserviceable materials within 200 m lead as per direction of Engineer-in-charge.

Providing structural repairs in old damaged concrete structures/surfaces with approved Polymer modified mortar as and where required in all the buildings with following operations. a) Removal of loose/Spalled or damaged concrete by chipping and cleaning the concrete surface and reinforcement steel with wire brush and with water. b) Cleaning the re-bars with Acetone for complete rust removal and washing with water to make the surface clean. c) Applying protective coat/bond coat using polymer and cement in the proportion of 1:1.5 (1part of polymer and 1.5 parts of cement in synthetic enamal paint like consistancy with brush. d) Reinstate the area with polymer modified mortar in layers of maximum 20mm with the proportion of Cement 50Kg :washed and dried river sand 87.50kg; silica sand 37.50Kg. mixed with 10litres of Polymer (or1Kgcement:1.75kg washed and dried river sand ; 0.75 Kg silica sand : 200 ml polymer). e) If thickness of repair exceeds 20mm,after every 20mm thick repair, bond coat as per 3 above to be applied and further thick of repair to be continued for each layer. Note: This work is inclusive of all materials, labour & providing double Tubular scaffolding system using H Frames / APS system or (cup lock type) upto 15 meters height complete all as directed at site.

Providing & Laying free flow, shrinkage compensated, corrosion inhibiting high strength Super Fluid Micro Concrete (having compressive strength of min 45MPa as per ASTM-C-579 and flexural strength of min 6MPa as per ASTM-C-348) as per the directions of the manufacturerer using quartz aggregate up to 50 % of weight of Microconcrete for confining the columns, column top, beams etc including curing etc complete as directed by EIC.

Applying one primer coat based on Araldite GY 257: Aradur HY 140 in the ratio 100:50 pbw over bond coat. Over this apply 3 mm thick epoxy mortar using Araldite GY 257: Aradur HY 140 : Mix -10 in the ratio 100:50:900 pbw over this apply 2 layers 100:110 gsm expoy compatible glass c/o impregnated with GY 257/Aradur 140 in the ratio 100:50 and apply over this 2 seal coats based on Araldite GY 257: Aradur HY 140:Silica Flour :Flow Control agent in the ratio 100:60:20:3 pbw and Sprinkling Sand.

Providing and Laying 5 mm thick Epoxy screeding consisting of Araldite GY 257, 100 Parts by weight, Hardner HY 830, 40 parts by weight Hardner Hy 850, 20 parts plus quartz sand 900 parts over a primed surface with primer Aradldite GY 257, 100 parts by weight and Hardner HY 840, 50 parts by weight including application of 2 top coats based on Araldite 257, 100 parts Hardner HY 830, 40 parts, Hardner HY 850, 20 Parts and flow control agent 1 to 3% with acrosil DTD 75, 3 parts complete as per specification including preparation of surface to receive the treament.

Providing 20 mm thick External plastering in two coats under layer 12 mm thick with C.M 1:4 (using crushed sand) finished with a top layer 8 mm thick in C. M 1:3 (using crushed sand) including approved water proofing compound @ 2% by weight of cement or as per manufacturer's specifications, sieving of sand to required fineness, scaffolding up to 10 metres height, finishing, curing etc. complete as per specifications. and as directed by the Engineer-in?charge.

Providing Second Skin on the terrace using Polyester - Resin based waterproofing system with special non woven polyester fleece minimum 165 gsm as a reinforcement for arresting Water Penetration in the Building as described below:-Providing and applying (Pre Measured Packed) 2 components solvent free, highly penetrative, excellent adhesion property nearly to all substrates, Epoxy Based Primer on the clean and grinded surface. The substrate must be dry (in concrete, the residual moisture in the upper 2 cm must be < 5 %), sound and free from any material that would hinder adhesion. Mix component A (Blue component) into component B (Yellowish component) thoroughly in propotion 1 : 0.43 by weight with the help stirring stick. The mixture should be a uniform colour, free from streaks. Apply the primer evenly with roller and immediately lightly sprinkle silica sand (0.4 – 0.8mm) at the rate of Minimum 100 grams/SqM over the wet primer, including cost of all materials, labour, machinery, tools & tackles and consumables all complete as per specifications and as directed by the Engineer-in-charge. The primer should be completely dry for further application of liquid applied polyester resin based membrane. The Consumption depending on the nature and condition of the substrate for priming ~ 300 – 500 gm/SqM including cost of material, labour, tools & plants etc. complete. Providing and Applying (Pre Measured Pack) 3 components cold liquid applied waterproofing system based on Unsaturated Polyester Resin and special needle punched non woven, system compatible polyester fleece of minimum 165 GSM as reinforcement. The cold liquid applied reinforced system is highly crack bridging, UV stable, immediate rain proof. Add Catalyst powder to Polyester resin and mix thoroughly if atmospheric temp exceeds 25 Deg c then add inhibitor and mix thoroughly until no streaks and of uniform are visible. Applying Approx. 2/3 of the waterproofing mix material to the substrate uniformly and Fleece is rolled with roller, removing air bubbles and allowing overlap of 5cm. The remaining 1/3 of the waterproofing mix material is poured onto the surface until complete saturation is achieved. The total system of waterproofing for material and components shall be from single manufacturer. The system is totally wet on wet and no time lag should be kept during the total laying of the system. The minimum consumption of the material shall depend on the nature and condition of the substrate @ 2.6 – 3.3 Kg/SqM. The rate shall including cost of material, labour, tools & plants etc. complete. The tensile strength of the complete system/ membrane shall be minimum 6.25 N/Sqmm and Elongation with fleece reinforcement shall be minimum 74 % . The Tear Resistance of the membrane shall be minimum 32 N/mm and adhesive strength shall be minimum 2.5 N/Sqmm etc. Note : (1) It is deemed that the Contractor has visited the site and has fully understood the site conditions.The Contractor shall provide 10 years Performance guarantee for the complete waterproofing work. (2)The above work shall comply with complete waterproofing system of Single Manufacturer meeting all the technical specifications as per relevant codes and standards and complete material components as per manufacturers specifications shall be used in the work.The quoted rate shall be deemed to include the cost of complete system specified by the Single Manufacturer meeting all the technical specifications as per relevant codes and standards irrespective of whether the same is not explicitly mentioned in the item description. (3) The work will also include sealing of all pipe inserts/embedded plates,protrusions,flashings with the above Waterproofing system and the cost of the same shall be deemed to be included in the quoted rate. (4)The quoted rate shall include the cost of repairing the unsound portions/cracks with polmer modified mortar/concrete wherever necessary and the cost of the same shall be deemed to be included in the quoted rate. (5) Tentative/suggested model & make for the guidance of bidder(s): Kemperol V210 system of M/s Kemper System (India) Pvt. Ltd. or approved equivalent. (6) Mode of Measurement: Net area which is covered by the complete system shall be measured for payment

Filling up the existing cracks in RCC/brickwork by providing one-part, moisture curing, non sag elastomeric Polyurethane sealant suitable for movement and connection joints. The work involves opening and preparing the substrate/cracks by grinding/cutting tool to make a uniform groove of specified size.The groove cut shall be cleaned of all dust and friable particles.The joint surface should be sound, thoroughly clean, dry and free from grease, oil or any other contamination. All dust and debris must be removed by wire brushing, grinding and vacuuming.Further a closed cell polyethylene foam backer rod having a diameter 20-30% larger than then the width of joint shall be inserted in the groove with a blunt tool.Necessary masking tapes shall be used for exact joint lines.The groove edges shall be applied with masking tape prior to application of sealant and the same shall be removed before skin formation.The sealant shall be of approved make and quality, specifications, complying to ASTM C920, & ISO 11600, and the quoted rate shall include the costs of all materials,primer,backer rod,masking tapes, tools and tackles,all lift ,leads, tooling,cleaning,testing as per manufacturers specifications and the directions of the Engineer-in charge complete -Upto 40 mm depth and 25 mm width.

Providing, applying one coat of acrylic based Textured plaster (Polymer based Textured Coating / Synthetic plaster by metallic trowel) with the (STUCCO Texture) finish or approved equivalent meeting all the technical specifications as per relevant codes and standards with average thickness of 2.50 mm and Finished with 3 Coats of High performance coating or approved equivalent meeting all the technical specifications as per relevant codes and standards and of approve shade including preparation of the surfaces, complete. as per specifications and as directed by the Project Engineer. Tentative suggested make for guidance of bidders: "DURASHIELD- Dura tuff/Kemtex" or approved equivalent. Note : Old Paint shall be removed mechanically with wire brush attachment to machine before application of primer and paint.

Providing, centering, shuttering Form work using steel plates, timber planks for all types of structures including necessary strutting, proping, staging, supports, bracings etc. and deshuttering the same after the specified time all as per drawings, specifications and as directed by the Engineer-in-charge at all levels. a) For Super structure.

Providing and laying in position cement concrete of 1:2:4 (1 cement, 2 crushed sand, 4 graded stone aggregate of nominal size 20 mm) including consolidation, finishing, curing etc. complete as per specification and drawings but excluding the cost of Formwork shuttering, centering and steel reinforcement at all Levels.

Providing Reinforcement Steel for reinforced cement concrete at all levels including supplying, preparation of bar bending schedules, cutting, bending, transporting, fixing, binding with annealed steel wires of 0.9 to 1.6 mm thickness, and placing in position &/or welding with the existing re-bars wherever necessary complete, all labour charges, cost of cover blocks in specified grade of concrete etc. complete as per specifications and drawings. Steel shall be supplied by the contractor, Using TMT bars of specified grades of all sizes. TMT bars to be supplied by the contractor from the own plants of SAIL, RINL or TATA make only using virgin materials.

Providing Epoxy chemical coating treatment of Reinforcement bars for old as well as new bars for PMM & repair including rust removing coating & Epoxy coating all inclusive of material & labor charges and as directed by EIC.

Providing and inserting HYSD shear key bars of required length and diameter in reinforced or plain cement concrete as per drawing & directions of EIC including power drilling holes of appropriate diameters to a minimum depth of equal to 12 times the diameter of shear key bar (minimum 12 mm dia, 200 mm long shear key bar), cleaning the drilled holes of loose dust by blowing, insertion of epoxy from cartridge, placing the shear key bar in position and allowing it to stay undisturbed for 24 hours. (Rate shall include cost of labour, all materials, T&P for power drilling in concrete, epoxy cartridges, plastic nozzle etc complete including cleaning the drilled holes of loose dust by blowing air).

Treatment/repairs of the Cracks and joints in roof, wall, flooring, basement, pipe trenches etc. as and where required in all as following: Cutting V groove 10 mm to 50 mm wide 15 mm deep along with the cracks.

Filling the V groove 10 mm to 50 mm wide 15 mm deep with non shrinkable cementious crack filler of approved manufacturer.

Drilling and fixing 12 mm Φ x 100 mm long nozzles by drilling upto 200 mm depth in brick masonry wall & 50 mm depth in RCC; removing the nozzles after completing of grouting job, filling/repairing the holes with epoxy etc.

Injection grouting with low pressure grouting system of epoxy system of Araldite GY 257/Aradur 21/Aradur 450/Aradur 2958 in proportion of 100:10:30:1 pbw for the injection grouting or approved make including cost of material, labor, all tools & tackles, pump set etc. and as recommended by the EIC. Aradur 21 & 2958 proportion shall be adjusted as per the site conditions.

Providing and fixing G.I. chicken mesh in the junctions of concrete & brick work / masonry or as directed by the Engineer in charge including cutting, fixing with nails in position before plastering complete all as directed by the Engineer-in-charge. (only area of the chicken mesh used alone will be measured).

Providing and fixing double tubular scaffolding system using Hframes with cup lock type on the interior / exterior side upto a height of 25 meter, made with 40 mm dia M.S. tube 1.5 m centre to centre horizontal and vertical tubes joining with cup and 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 building etc. wherever required for inspection of work at required locations with essential safety features for the workmen etc. complete as per directions and as approved by the Engineer -in - charge. The elevational area of the scaffolding shall be measured for payment purposes. The payment shall be made once irrespective of duration of scaffolding.

Dismantling 150 mm Dia drain pipes in shafts / open piping including taking out the pipes manually, breaking lead caulked joints, melting of lead, making into blocks including stacking of pipes within a lead of 200 m as per direction of Engineer-in-charge.

Providing and fixing PVC rain water pipes conforming to relevant IS type B and PVC SWR fittings & specials conforming to relevant IS including jointing with seal ring / With PVC solvent adhesive including fixing in walls using clamps etc complete all as per drawings, specifications and as directed by the Engineer-in-charge. a) for SWR PIPE 160 mm O/D.

Repainting of walls, columns, beams & other civil structures / MS structures like piping, equipments, MS structures, trusses, purlins etc with two coats of Synthetic enamel / plastic emulsion paint of approved shade & make over two coats of primer (up to a height of 5 meter) including surface preparation, minor civil repairs of cracks etc., preparing the surfaces, removal of old paint, if any, sand papering, as required including cost of scaffoldings, ladders, cost of all painting materials like paints, primer, knifing compounds, putty, sand paper, cleaning materials etc, cost of labour, all as per drawing, specifications and as directed by Engineer -in-Charge. The repainting job involves repainting in offices & laboratories of Attached lab and all lifting / shifting of materials, ladders, scaffolding etc shall be within the scope of work of the contractor and the cost of repainting shall be inclusive of the same. Also, repainting on MS structures with Synthetic enamel paint will have a thorough surface cleaning before application of primer and two coats of paint of approved shade & make.

Lead charges for lead up to 4 KM but not exceeding 4 KM, by mechanical transport including loading, unloading, stacking / levelling etc. a) Dismantled water proofing material/plaster/dismantled concrete material etc.

Shivkrupa Enterprises (BID ID -3244353)

OMKAR ENGINEERS AND CONTRACTORS (BID ID -3244690)

Meena Enterprises (BID ID -3244452)

Mahendra Realtors & Infrastructure Limited (BID ID -3245269)