REAPIR/MAINT/IMPROVEMENT OF CLEAR WATER TANK AND CONNECTED WORKS AT LEBONG UNDER AGE (I) DARJEELING(2nd Call)

M & L for removing tiles from the inner surface of reservoir, preparation of surface like chiselling / scraping and cleaning with water and make the tank surface smooth suitable for water proofing coating complete including removal of debris upto 50 mtr and dump in any suitable spot out of the reservoir complete all as specified and as directed.

M & L for making V groove of 10 mm wide and 30 mm deep or upto the extend of joint/ crack present at site over joint / crack lines using electricity operated angle grinder with diamond concrete saw blade and cleaning it by air blower and vacuum cleaner etc as required. The grove shall be cut on the concrete surface along the joint/ crack lover RCC structure to be repair complete all as specified and directed. Note: work to be executed by the authorized applicator of manufacture who have at least 5 years of working experience with MES in the same field complete all as specified and directed.

M & L for drilling hole of 12 mm dia up to 100 mm deep holes in structure members at the interval of 300 mm in staggered manner or along the joint and crack line in reinforced concrete (RC) structure element including cleaning of the holes by the air blower and inserting 12 mm dia nozzle compatible with injector and having machined external end to receive outlet of grouting gun. Fix inside the hole by applying thixotropic epoxy adhesive Sika Dur 31 or equivalent to ensure complete sealing and allow curing the system for minimum of 8 Hrs. before grouting including nozzle projections excess putty, if any over concrete element by grinding levelling and finishing the external surface after completion of work etc complete all as specified and directed. Note: work to be executed by the authorized applicator of manufacture who have at least 5 years of working experience with MES in the same field complete all as specified and directed.

M & L for sealing of exposed V groove of 10mm wide and 30mm deep with Sikagard 694F(I) or Quick Fix or equivalent solvent free, moisture tolerant thixotropic two part structural adhesive as approved and repair mortar cum surface levelling mortar. Note: Work to be executed by the authorized applicator of manufacture who have at least 5 years of working experience with MES in the same field complete all as specified and directed.

M & L for injection grouting of construction joints with non shrink cement slurry admixed with epoxy grouting Cebex 100 of M/S Fosroc Chemical /SikaGrout-214IN or equivalent as approved @ 300 mm C/C including of opening of crack to be grooved of size 12 mmx12mm, nozzle at 300 mm C/C including of opening of cracks to be grooved of 10mmx10mm fixing of nozzle with fast setting plugging compound Renderoc plug, cutting the extra length of nozzle after grouting all in complete as per manufactures instructions including necessary scaffolding as required and as per the direction of Engr-in-Charge complete all as specified and directed. Seal the nozzle with Sika guard 694F(I) or equivalent thixotropic epoxy putty after the refusal of grout material from the nozzle. Note: 1. Leakage through other nozzle or cracks are required to be monitored while grouting and such points to sealed as and when required without any cost. 2. Work to be executed by the authorized applicator of manufacture who have at least 5 years of working experience with MES in the same field complete all as specified and directed.

Providing and applying two coats Sika Topseal 107 or equivalent as approved of the wall and floor of the tank a two components ready unto use polymer modified cementations coating first coat should be applied horizontally and second coat applied vertically the thickness of coating shall not be less than 1.5 mm complete all as specified and directed. Note: Work to be executed by the authorized applicator of manufacture who have at least 5 years of working experience with MES in the same field complete all as specified and directed

Applying two coats Sikagard 67 or equivalent as approved a water based epoxy coating certified for portable water on all over the concrete surface from inside. Apply the first coat by brush allow it to dry for 6-8 hrs and then apply second coat and all ow it cure complete 24 hrs. The coating shall be applied using brush application The thickness after two coating should not be less then 500 micron complete all as specified and directed. Note: Work to be executed by the authorized applicator of manufacture who have at least 5 years of working experience with MES in the same field complete all as specified and directed

S & jointing and testing of cast iron Sluice Valve ISI mark (PN-1.6) of size 100 bore confirmenf to IS 14846-2000, flanged ends drilled having stainless spindle with cast iron wheel at top complete with nits, bolts, washer and gaskets complete all as specified and directed.

M & L for core cutting of existing tank and insertion of new outlet of DI 150mm short piece of desire length incl type CI/GI fitting for jointing/ connection to exiting lines as directed by Engr-in-Charge complete all as specified and directed.