STRUCTURAL RETROFITTING WORKS AT KV AF STATION BAGDOGRA UNDER GE (AF) BAGDOGRA

Amount

M&L for repair of damaged RCC members using Polymer Modified Mortar (PMM) in the following steps:- 1. Surface preparation : Chipping of existing loose, damaged concrete from RCC members of all affected RCC Columns, Beams, Slabs and Chajjas on external and internal facades, etc beyond main reinforcement carefully with chisel and hammer, washing with water and dusts removed by air blower. Clean the surface and make sure that surface is clean and free from loose particles. 2. Applying Rust passivator: Clean the rusts using rust passivator "SUNANDA Rusticide SS or equivalent" and washing the rod thoroughly. 3. Applying Anti-Corrosive Coating: Clean the reinforcement and apply the anti-corrosive coating like SUNANDA Polyalk fixoprime or equivalent in proportion 1.5:1 (Cement:Polyalk fixoprime) to the exposed surfaces of the reinforcement. 4. Provision of epoxy jointing compound: Providing and applying bonding coat of slurry made out of "Polyalk EP SONANDA" or equivalent in proportion 1:1 (Cement:Polyalk EP) to the existing concrete surfaces 01 hour prior to the PMM coating. 5. Application of Polymer Modified Mortar: Prepare the Polymer Modified Mortar (PMM) in proportion 1:5:15 (Polyalk EP:Cement:Fine&Coarse Quartz sand). Initially mix the sand and cement thoroughly in dry condition and add Polyalk and mix the same using hand and apply the PMM of required thickness over the primed surfaces including Hand packing, curing and making the surface for rough for plastering complete. Note : 1. The rates includes necessary scaffolding/props to execute the work. 2. Plastering and finishes shall be measured and paid separately. 3. Polymer modified Mortar (PMM) of ready mixed repair mortar (ready to use type) may also be used in lieu of hand mixed PMM of approved make Sonanda/Asian Paints/Fosroc or equivalent as approved by GE. 4. Rate quoted inclusive of one coat of anti-carbonation paint over the treated surfaces.

M&L for filling and reinstating of separation cracks using Polymer Modified Mortar (PMM) in the following steps:- 1. Surface preparation : Opening the separation cracks at the junction of RCC and Masonry where ever directed and instructed into "V" grooves 50mm to 75mm depth of the cracks by carefully marking the areas to be opened up using a cutting machine and skilfully carefully chiselling with a well sharpened chisel and hammer as directed including wire brushing and washing of concrete substrata and masonry walls with water jet to the surfaces thus prepared to the entire satisfaction of the Engr-in-Charge. 2. Provision of epoxy jointing compound: Moistening the cracks and applying bonding coat of slurry made out of "Polyalk EP SONANDA" or equivalent in proportion 1:1 (Cement:Polyalk EP) to the existing concrete surfaces 01 hour prior to the PMM coating. 3. Application of Polymer Modified Mortar: Prepare the Polymer Modified Mortar (PMM) in proportion 1:5:15 (Polyalk EP:Cement:Fine&Coarse Quartz sand). Initially mix the sand and cement thoroughly in dry condition and add Polyalk and mix the same using hand and filling the cracks using PMM over the primed surfaces including Hand packing, curing and making the surface similar to the external plastering using wooden floats/punch etc complete. Note: 1. The rates includes necessary scaffolding/props to execute the work. 2. Plastering and finishes shall be measured and paid separately. 3. Polymer modified Mortar (PMM) of ready mixed repair mortar (ready to use type) may also be used in lieu of hand mixed PMM of approved make Sonanda/Asian Paints/Fosroc or equivalent as approved by GE. 4. Rate quoted inclusive of one coat of anti-carbonation paint over the treated surfaces.

Drilling holes of required size upto 16mm diameter and upto 50mm depth in concrete and cleaning the same complete all as specified and directed.

Providing and fixing 12mm dia aluminium/PVC injection nipples and securing the same as directed & providing and injecting cementitious grout using CEBEX-112 additive of FOSROC or equivalent at the rate of 225 grams per bag of cement and using suitable mechanical gun/pump including mixing etc complete all as specified and directed.

Drilling & fixing of epoxy (FOSROC LOKFIX in 3:1 ratio) dipped shear keys of 10mm dia and 4" to 6" length in columns before jacketing, micro concreting etc complete all as specified and directed.

M&L for providing and laying super fluid Micro concrete Sika Rep Microcrete 4 or equivalent in beam bottoms, columns, slabs etc. including mixing with 6mm aggregates if necessary, water proof plywood/steel plate shuttering, pouring, temping, consolidating, curing etc as per manufactures instruction complete all as specified and as directed. Procedure of micro-concrete as follows:- 1. Surface preparation : Opening the separation cracks at the junction of RCC and Masonry where ever directed and instructed into "V" grooves 50mm to 75mm front the either side of the cracks by carefully marking the areas to be opened up using a cutting machine and skilfully carefully chiselling with a well sharpened chisel and hammer as directed including wire brushing and washing of concrete substrata and masonry walls with water jet to the surfaces thus prepared to the entire satisfaction of the Engr-in-Charge. 2. Provision of epoxy jointing compound: Moistening the cracks and applying bonding coat of slurry made out of "Polyalk EP SONANDA" or equivalent in proportion 1:1 (Cement:Polyalk EP) to the existing concrete surfaces 01 hour prior to themicro concrete. 3. Extra Reinforcement shall be provided if necessary for columns/beams. 4. Proper air tight shuttering shall be made for beams/columns for pouring the micro concrete. 5. Place about 80–90 % of the premeasured clean water into a clean mixer and gradually add the whole bag of SikaRep® Microcrete-4 into it while continuously mixing. 6. Add the remaining water and additional clean 5–10 mm aggregates (if needed as per design) until the desired consistency is obtained. 7. Mixing time should be minimum 3 minutes. Note : 1. The rates includes necessary scaffolding/props to execute the work. 2. Plastering and finishes shall be measured and paid separately. 3. The rates includes necessary shuttering with water proof ply or steel shutters. 4. The item shall be paid on actual consumption of Micro concrete powder.

M&L for Carbon fibre wrapping system in the following steps:- 1. Grinding/moulding concrete surfaces, cleaning it with wire brushes, removing oil, laitance if present, rounding sharp edges to min 25mm radius etc. 2. Filling holes by using cement and sand mortar 1:3. 3. Applying a coat of Epoxy based (hardener:base) in a specified proportion as per manufacture's instruction and wrap a carbon fibre sheet at desired orientation using tamping roller to avoid any air voids etc., repeat the same procedure for multiple layer with interval of 8 hours. 4. Applying a coat of Epoxy based (hardener:base) in a specified proportion as per manufacture's instruction over carbon fibre sheet and sprinkle the sand for further plastering etc., complete all as specified and directed. Note : 1. The rates includes necessary scaffolding/props to execute the work. 2. Plastering and finishes shall be measured and paid separately. 3. The item shall be paid per Sqm of Fibre sheet consumption and not as per application of surface area. Note for item No 1 to 7: (a) From item No 1 to 7 should be executed by an authorized applicator with their expert team as approved by GE. (b) Make for item No 1 to 7 - Sonanda/Asian Paints/STP/Fosroc/Chowksy or equivalent as approved by GE. (c) Rates quoted for item No 1 to 7 are inclusive of necessary scaffolding/platform/props to execute the work.

M&L for 15 mm thick rendering in CM (1:4) on fair faces of brick work or concrete surfaces finished even and fair without using extra cement with using WPC 3% by weight of cement on wall complete all as specified and directed. Note: WPC shall be measured and paid separately.

M&L for 10mm thick rendering in cement mortar 1:3 on fair faces of concrete surfaces without using extra cement on ceiling with using WPC 3% by weight of cement on wall complete all as specified and directed. Note: WPC shall be measured and paid separately.

Supply only liquid water proofing compound.

M&L for preparation of new plastered surface of wall and applying 1.5mm thick Birla or equivalent wall putty and applying two coats of acrylic emulsion distemper over a coat of priming paint complete all as specified and directed.

M&L for preparation of new plastered ceiling surface and applying three coats of white wash complete all as specified and directed.

M&L for preparation of newly plastered surface of wall and applying two or more coats of 100% Premium acrylic emulsion paint having VOC less than 50 gm/litre and UV resistance as per IS 15489:2004, Alkali & fungal resistance, dirt resistance exterior paint of required shade (Company Depot Tinted) with silicon additives @ 1.43 litre/ 10 sqm over and including priming coat of exterior primer applied @ 0.90 litre/ 10 sqm over new surface complete all as specified and directed.

M&L for TMT bar of 10mm dia and over cut to length to shape required cranking and bending spirally for hooping column and like incl binding with mild steel wire not less than 0.9mm dia complete all as specified and directed.

Dismantling of 75mm/100mm dia cast iron/PVC drain pipe jointed in cement mortar and taking out of walls complete all as specified and directed.

S&F 110mm dia PVC (SWR) pipe single socketed, in any length with rubber ring joints, fixed to walls complete all as specified and directed.

M&L for complete removal of existing treatment by scraping down and washing the surface and applying two coats of exterior emulsion paint weather coat over a coat of exterior primer complete all as specified and directed.

M&L for preparation of old decorated internal wall surface and applying one coat of oil bound distemper complete all as specified and directed.

M&L for preparation of old decorated ceiling surface and applying one coat of white wash complete all as specified and directed.

M/s Prakash Traders (BID ID -3150031)

BUILDERS ASSOCIATE (BID ID -3150153)

UNISON CONSTRUCTION (BID ID -3150479)

M/S IDEAL CONSTRUCTIONS (BID ID -3150561)

HALDER ENTERPRISERS (BID ID -3150403)

R.N.Construction Co. (BID ID -3150511)

M/S B K ENTERPRISE (BID ID -3149885)