SPECIAL REPAIR TO SWT AND ASSOCIATED AREA AT AFAC COIMBATORE

Removal of Plants/ Shrubs grown on walls/ slabs/beams by making holes or demolition of concrete etc and including applying suitable chemical for killing the roots of Plants, filling of holes with concrete and making good complete all as specified and directed.

Chipping/removing loose concrete in cloumns/beams/ chajjas/roof slab etc. up to reinforcement bars without damaging the reinforcement, removing all the loose material and to make all the exposed surface free from dust and all impurities etc complete all specified and directed.

Removing corrosion of steel reinforcement by mechanical means like wire brushing, chipping to remove loose rust and then applying rust removal solution Reebaklens RR of Fosroc / Sika Rust off 100 / equivalent in bostic India Ltd by using brush application, leaving the surface for at least 15 to 30 minutes, then removing loose materials by scrubbing or with brush and applying anti corrosive coating to reinforcement Nitozinc primer of Fosroc/Sika Friazinc R / equivalent in Bostic india Ltd , all as recommended by product manufacturer.

Providing and applying one coat of structural grade epoxy coat by brush of approved makeand mixing of two components will be as directed by manufacturer .Application shall be provided not more than 5 hours before application of micro concrete/polymer mortar etc complete all as specified by the manufacturer. Make :- Nitobond EP of FOSROCK/ Sikdur 32LP/ equivalent in Bostic India Ltd

Providing and applying n exc 40 mm thick (In layers of each 10mm thick) Shrinkage controlled, polymer modified, fibre reinforced cementitious repair mortar Renderoc SP 40 of Fosroc / Sika plastocrete plus/ equivalent in bostic India ltd, mixed with water in a water & powder ratio 0.18 in ceiling of roof slab/Chajjas/Beams/Parapet walls etc . Note for item Nos 1 to 5:- Quoted tate is deemed to be inclusive of providing scaffolding for working in patches upto a height of 15 Mtr complete all as specified and directed.

Surface grinding, Rounding off all edges to minimum of 25mm radius and applying Nitowrap CWS 230 of fosrock (or) sika wrap 230C, uni directional, high strength, light weight, non corrosive carbon fiber sheets of all around the periphery of pier for entitre height of pier.The FRP fabric used shall be of zero degree unidirectional fibers having fiber density of 1.8 g/cc and shall have tensile strength > 4900 MPa ; tensile modulous > 230 GPa and ultimate elongation of 2.1%. The substrate shall be primed with Nitowrap 30 epoxy primer & Nitowrap 410 impregnating resin saturant shall be used for saturating the fibers.Saturant used shall have tensile strength of >30 MPa; Elongation > 2% ; Flexural strength > 30 MPa ; Tensile Modulous > 2400 MPa & Flexural Modulous > 1700 MPa when tested as per ASTM D638 Type I and ASTM D 790 & Glass Transition Temperature > 50 deg Celcius as per ASTM E 1356. The adhesion of the entire system (FRP Sheet, Saturant and primer combined) with concrete shall be > 3.5 MPa with concrete failure as per ASTM D 4541.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, etc, complete. Product used shall have CE (CE-29842) marking and compliance according to Construction Products Directive 89/106/EEC (CPD) Note : For soffits or walls of UG Sumps / OHT / SWTs

Taking down cement plaster on brick/ concrete/ stone in ceilings, walls, roof slab etc including racking out Joints, hacking for key, scrubbing down with water, etc complete all specified and directed.

Material and labour for Rendering 20mm thick in two layer of 10mm each on fair faces of concrete surfaces in CM 1:4 mixing with integral water proofing compound (WPC) @ of 3% of cement and finished even and smooth (without using extra cement) over cleaned, brushed by wire brush and washed by water etc complete all as specified and as directed. Note :- WPC will be measured and paid separately as supply only.

Supply only water proofing compound complete all specified and directed.

Supply and fix wire netting of SS/ Fibre wire mesh 0.91 mm dia size of mesh 12 mm on wall surfaces to receive plastering fixed with tinned tacks of wire staples all as specified and directed.