SPL REPAIR TO ONE LAKH GALLON CAPACITY OHT AT BOOSTER PUMP HOUSE UNDER GE CLEMENT TOWN, DEHRADUN

Amount

Demolition of reinforced cement concrete in any position as in stair case including columns, beams, landing etc connected with existing RCC overhead tank up to the height of 21.50 m including cutting reinforced bars to facelitate demolition. The demolition of RCC stair case shall be carried out carefully by errecting scafolding up to the required height. The beams connected with RCC tank shall be demolished by cutting the reinforcement bars and making good the disturbed surface complete all as specified and as directed. (Note:- (a) The cost of scafolding is deemed to be included in the rates quoted by the contractor. (b) - The contractor shall make adequate arrangements for safety of labourers.) (c) Utmost care shall be taken , while demolition of member so that structure soundness of the RCC OH tank is not distrubed.

Dismantling wrought iron or mld steel work of any description not otherwise complete all as specified and as directed.

M&L mild steel framed work as in stair case up to height of 21.50 m with MS hollow square/rectangular tubular section/MS channel/ angle iron, flat iron etc in vertical posts, steps, landing,railing etc complete all as specified and as directed. (Note:- (a) The cost of scafolding is deemed to be included in the rates quoted by the contractor. (b) - The contractor shall make adequate arrangements for safety of labourers.)

Excavation over areas n exc 1.50 m deep and getting out n soft/loose soil complete all as specified and as directed.

M&L Cement concrete (1:2:4) type B2 using 40 mm graded crushed stone agreegates as in foundation filling or mass concrete complete all as specified and as directed.

Removing excavated material n exc. 50m and depositing where directed at a level n exc. 1.5m above the starting point complete all as specified and as directed.

Repairs to RCC Over Head tank of capacity one lakh Gallon ( approx 4.5 Lakh Ltrs) at the stagging of 21.50 m high with the execution following items as given in item No. 7.10 to 7.80 & bidders are requested to quote their rate against each item accordingly complete all as specified and as directed. RCC surfaces must be clear, even and sound concrete with removing all oil, dirt, laitance, protension (by light grinding) and other contaminants manually to attend fairs smooth surface.

Crack Treatment : M&L for Cutting and opening cracks to a depth of 10mmx10mm in V shape by mechanical means. Cleaning all the dirt and loose particles by airpressure and wetting crack to attain SSD condition. Filling the crack using Nitobond SBR of Fosroc / SBR Latex of Sika/Tapecrete RTU of Cico having specific gravity ranging from 1.015 to 1.040 @ 27 deg celsisus mixed in the ratio of 1 (polymer) :3 (Cement) maintaining W/C ratio to 0.35 to achieve thixotropic consistency. Product should be tested in accordance with BS 6319 complete all as specified and as directed.

Injection Grouting : M&L for Providing Chemical injection treatment in the form of pressure grouting to the cold joint by injecting cement slurry (Cement to be used should have min blain value 300 - 500 sqmtr per kg) mixed with grout admixture Damp block 2K of Asian paints/ Cebex 100 of Fosroc/Intraplast of Sika/ Crystal Seal of CIco @ 225 gms per 50kg of cement, in the required consistency through the pre fixed PVC nozzles in the 18 mm dia holes, fixing of PVC nozzles with Renderoc Plug and final cutting the projected nozzles and sealing off the PVC nozzles after the injection operation is over with Renderoc plug, non-shrink rapid setting mortar compound, finishing, curing etc. as per manufacturers specification and complete all as specified and as directed.

Bore Parking : M&L for using Nito bond SBR as bonding agent over pipe and internal side of concrete followed by providing and applying high strength non shrink grout Conbextra of fosroc / Grout 214 of Sika/Grout GP2 of Cico or equivalent for the gap around pipes for a gap up to 20mm (between pipe and concrete) before treating the surface with Waterproofing layer complete all as specified and as directed.

Coving : M&L for applying Cement Mortar (1:4) admixed with Nitobond AR having 43% solid contents at the junction of slab and vertical offsets. Nitobond AR mixed cement mortar shows 75% improvement in adhesion (slant'shear strength N/mm2 as per BS 6319) having control samples complete all as specified and as directed.

Waterproof coating : M&L for applying two coats of high performance, elastomeric, acrylic polymer modified cementitious coating like Brushbond RFX of Fosroc/ Top seal 109 HY of Sika/ Tapecrete RTU of Cico having a mixed density of 1.6kg/cc manufactured by fosroc chemicals /Dr Fixit/SIKA/CICO aplied by company authorized applicators with minimum recommended coverage is 0.5m2/per kg/2 coats to achieve a DFT of 1mm. waterproof coatings shall confirm to ASTM C-836, ASTM D 45641 & ASTM D4060 complete all as specified and as directed. Brushbond RFX coating shall exhibit the following properties: (a) Abrason resistance ASTM-D4060 : 0.85 (b) Tensile strength as per ASTM D412 is 1N/mm2. (c) Adhesion to concrete is greater than 1N/mm2 and (d) Static crack accommodation ASTM-C836 min 1mm system include supply and application all complete as per the fosroc methodology/ or equivalent as approved by GE.

Food grade coating (internal): M&L for providing, mixing and applying Nitocote EP405 manufactured by Fosroc Chemicals India Pvt Ltd and applied by authorised applicator. Nitocoat EP405 of Fosroc/Sikagard -67 of Sika/ Cicoguard-WS of Cico is 100% (volume of solids) solvent free epoxy resin system designed for potable water retaining structures. Minimum recommended rate of applications is 0.25-0.30 lit/ sqm to achieve a total DFT of 200 microns. Product shall be CFTRI approved and cured film shall comply with the requirements of IS 9833-1981. system includes surface prepration and application as per methodology complete all as specified and as directed.

Protective Coating (External) : M&L for providing and applying Dekground E2000 manufactured by Fosroc Chemicals India Pvt Ltd or equivalent and applied by authorised applicator Total anticarbonation system comprises of a silane siloxane based penetrating primer (Dekguard primer WB) and elastomeric pigemented coating (dekguard E2000). Deckguard E2000 is a single component elastomeric, anticarbonation, liphatic acrylic protective coating, or equivalent as approved by GE Minimum recommended rate of application is 1.5m2/lit (including wastage) to achieve a total DFT of 200-300 microns on external side of OHT fulfilling functional parameters of following:- (a) Static crack spanning capability @200 microns dft @23°C : 2mm as per ASTM C836-76. (b) Solar reflective index (white colour) 105% as per ASTM E1980-11 (c) Adhesion greater than 1.0N/mm² as per BS 1881. (d) CO2 diffusion resistane not less than 240 mm equivalent of air thickness and 60cm equivalent of 30N concrete (Taywood method, at 309 microns dft) System includes surface preprtion and application as per Fosroc methodology or equivalent as approved by GE.

Weather proof acrylic exterior emulsion on external surfaces OH Tank (Approx 4.54 Lakh Ltrs) capacity on 21.50m high staging : M&L for complete removal of existing treatment by grinding the surface with mechanical sander before preparation of surfaces of old painted surface by cleaning, rubbing with gunny bags and washing the entire surface with water mixed with bleaching powder and applying two coats of weather proof acrylic exterior emulsion paint (Ist quality) over a coat of primer on entire surface of old tank including columns, beams, cross beams, beams above slab, exterior surface of tank. The rate quoted by the contractor included all scaffolding arrangement to carryout the work on exterior surface of one Lakh Gln OH Tank. The second coat of paint shall be applied after getting the Ist coat approved by GE. The application of paint shall be done with the roller only. The contractor shall arrange all safety belt and all other equipment like helmets etc and shall be fully responsible for the safety of the labours. The contractor is advised to visit the site and work out the requirement before quoting the rates. The rate also includes all necessary scaffolding minor repairs requested and nothing extra shall be cleaned by the contractor Note for item No. 7.00, 7.10 to 7.80 :- (a) The cost of scaffolding upto a height of height of 21.50 mtr is deemed to be including in the rate quoted by the contractor. (b) The contractor shall make adequate arrangening for safety for the labourers and rate for which is also deemed to be included. (c) The work shall be got executed by the applicator of approved manufacturers. The contractor shall produce MOU with approved manufacturer as given in Appendix 'B' of make and schedule 'A' notes for execution of above work/ item.

M&L for rendering 15mm thick in CM (1:4) on concrete surfaces of external walls of RCC OH tank using WPC @2% by weight of cement , finishing the surface even and smooth without using extra cement complete all as specified and as directed. (Note:- WPC shall be measured and paid separately under respective item as "Supply only".)

Supply only integral waterproofing compound (Liquid) complete all as specified and as directed.

M&L preparation of new or previously untreated steel surfaces of any description, over 10 cm width or girth, not otherwise described and applying two coats of synthetic enamel paint (ordinary tint) over a coat of red oxide zinc chrome primer complete all as specified and as directed.

NOTES :- 1. For the items for which specifications not mentioned any where in the tender, the BIS specifications shall be followed.

Aron Water Proofing and Pest Control