CERTAIN REPAIRS MAINT TO DAMAGED RCC MEMBRES CHAJJA ROOF TREATMENT PERIODICAL SERVICES DAY TO DAY CLEANING MAINT OF SEWAGE LINES SEPTIC TANK SWR PIPE SEWAGE SYSTEM SECURITY WALL GATES PILLARS FENCING AND CERTAIN MISC BR WORKS

M&L for Dismantling/ taking down old existing unserviceable cement plaster, loose/ unsound weaken cement concrete of any description and in any position from existing external / internal surface of RCC roof/ slab/ beams/ columns/ RCC facias for an average depth of 25mm (Approx height 7.5m from natural ground level) with power driven pneumatic flat/pointed chisel and removing the honeycombed area including all the corners and making a neat profile of the cavities, roughen the smooth surface , scrapping out/removing corrosion all loose/scale/rust etc form the visible reinforcement by applying rust remover such as Rust Off 100 of make M/s Sika India Pvt Ltd, or equivalent in M/s Fosroc Chemicals, M/s BOSTIk India pvt limited, M/s STP Limited, M/s Thermax Limited (as approved by GE) and cleaning the steel reinforcement properly all as per manufacturer instructions and all as specified and directed and comprising of below mentioned process :-

(a) Providing cement based admixed with Sikacim, integral waterproofing liquid M/s Sika India Pvt Ltd, or equivalent in M/s Fosroc Chemicals, , M/s BOSTIk India pvt limited, M/s STP Limited, M/s Thermex Ltd (as approved by GE) @ 0.2% by weight of cement or as per manufacturer’s instructions over a coat of acrylic emulsion bonding agent such as per as Sika Latex in 1:1:3 ratio of Make M/s Sika India Pvt Ltd, or equivalent in M/S Fosroc chemicals, M/s BOSTIk India pvt limited, M/s STP Limited, M/s Thermex Ltd (as approved by GE) having specific gravity of 1.02 or as per manufacturer’s instructions with necessary surface preparation such as creating mechanical key like roughening the surface by scrabbing, grit blasting and cleaning the existing surface using high pressure water jet machine having pressure upto 500 bar pressure to remove the dirt, dust, loose particles , wax, efforencene and other contaminations from the surface of RCC columns/ beams/ slabs/ facia/ any brick/ stone surfaces etc all as per manufacturer instructions and all as specified and directed by Engineer-in-Charge.

(b) Providing and applying FRIAZINC R, corrosion inhabiliting Active Zinc rich primer of make M/s Sika India Pvt Ltd, or equivalent in M/s Fosroc Chemicals, , M/s BOSTIk India pvt limited, M/s STP Limited, M/s Thermex Ltd (as approved by GE) along the exposed reinforcement surface property and allowed to dry.

(c) Providing and applying Hibond, Epoxy based Thixotropic bonding adhesive of Make of M/s Sika India Pvt Ltd, or equivalent in M/s Fosroc Chemicals, M/s BOSTIk India pvt limited, M/s STP Limited, M/s Thermex Ltd ( as approved by GE) over the prepared concrete surface to get a good bonding between existing concrete surface and providing Sika Rep Microcrete 4 Fiber reinforced cementitious repair micro concrete of make M/s Sika India Pvt Ltd, or equivalent in M/s Fosroc Chemicals, M/s BOSTIk India pvt limited, M/s STP Limited, M/s Thermex Ltd (as approved by GE) over Epoxy based bonding agent applied area before 6 Hrs etc including providing necessary proportions , bracing and runners to relieve the member from the load coming on it including scaffolding leak proof shuttering with working platform as required and as per design and pattern complete including preparing the surface to match with the existing surface all as specified and directed.

(d) Note : The work under (Item No. 1 to 4 of BOQ) shall be carried out through authorized and qualified applicators of the any following manufacturer only. M/s Sika India Pvt Ltd, M/s Fosroc Chemicals, M/s STP Limited, M/s BOSTIk India pvt limited,M/s Thermax Limited

(i) A performance guarantee certificate for two years shall be submitted by the contractor to the GE on completion of work as specified.

(ii) The unit rate quoted for item No. 1 to 4 of BOQ is deemed to be included for Removing of accumulated earth of any width and depth upto 15 cm cleaning/cutting the grass with hand operated petrol/kerosene driven grass cutting machine and removing the grass waste around 3 m from plinth protection to outside MD land Note: Periodicity of cutting of grass shall be before commencement of work and after completion of repairs.

M&L for removing old existing rubbish/battered/useless mixture of the binding materials such as cement / Lime and fine aggregate (<4.5mm retained on IS Sieve), loose/unsound weaken mixture of binding materials such as cement / Lime and coarse Aggregate (>4.5mm retained on IS Sieve), fine Aggregate of any description and in any position from existing external/internal surfaces of RCC components or any surface having average profundity of 15mm (Approx height 10m from natural ground level) by hand tool that has a long metal blade with a sharp edge at the end, chisel and hammer or using robust pneumatic chisel hand tools and removal beyond MoD land including cutting of all edges, making square shoulders of the aperture, coarsen the smooth surfaces, curettage /removing of all deterioted/decayed loose surface complete all as specified and directed by Engr-in-charge.

M&L for cleaning and removing all corrosion scales , rust , etc using emery / wire brush and finally cleaning using rust remover & cleaning agent that is one part alkaline based material, with corrosion inhibitors and dispersing agents and supplied as a clear brown solution. The specific gravity shall be 1.2 – 1.22 @ 25°C. The pH value shall be between 9.5 to 10 and the coverage shall be 5 – 6 m2/ L as per manufacturer instructions complete all as specified and directed by Engineer-in-charge.

M&L for repair to cracks and damaged existing surfaces by Hydrogen Free Expanding And Plasticising Additive . It plasticizes the mix, allowing for substantial reduction in water without affecting the fluidity, thus improving the strength and impermeability, the admixture/ additive in cement to provide non‐shrink properties Cementitious Cable Encapsulation . (a). Fixing of pvc nozzles in zig-zag fashion not more than 50cm c/c on RCC surfaces on all directions as required after drilling holes in concrete, fixing pvc nozzles with fast setting mortar and covering with renderoc plug. The size of holes shall be 20mm dia and 75mm in depth complete all as specified and directed by Engineer-in-Charge.