REPAIR TO ALLIED STRUCTURES INSIDE AIRFIELD AREA AT AFS THANJAVUR

Amount

Removing the existing damaged filled sealing compound including polyethylene rod in Construction / Dummy joints by raking out using blow lamp and cleaning of concrete pavement free from dust applying masking tape on edge of joint to prevent accidental spillage of sealant on top surfaces to give a neat finish to the sealant, provision of polyethylene backup rod 8 to 10mm dia in construction / dummy joint and sealed with COLPOR 200 polyurethane based sealing compound confirming to BS 5212 & 1990 BS -4254 and EN-141875-2003 (for hydrolysis / water resistance test) or equivalent of approved colour after application of suitable primer and removing the masking tape after the sealant filling etc complete for construction / dummy joint 6mm to 8mm wide all as specified and as per manufacturers instructions complete all as specified and as directed.

Removing the existing damaged filled sealing compound including polyethylene rod in expansion joints by raking out using blow lamp and cleaning of expansion joints of concrete pavement free from dust applying masking tape on edge of joint to prevent accidental spillage of sealant on top surfaces to give a neat finish to the sealant, provision of polyethylene backup rod 30mm dia in expansion joint and sealed with COLPOR 200 polyurethane based sealing compound confirming to BS 5212 1990 & BS -4254 and EN-141875-2003 (for hydrolysis / water resistance test) or equivalent of approved colour after application of suitable primer and removing the masking tape after the sealant filling etc complete for expansion joint 25mm wide all as specified and as per manufacturers instructions complete all as specified and as directed.

M&L for preparation of surface crack in flexible pavement using wire brush and cleaning the surface by using air blower/compressor and applying runway instant crack sealing tape of 150 mm wide, 2mm thick, having self adhesive, cold applied, polymer modified high tack bituminous to form high strength water proof layer complete all as specified as per manufacturer instructions complete all as specified and as directed.

M&L for preparation of surface crack in flexible pavement using wire brush and cleaning the surface by using air blower/compressor and applying runway instant crack sealing tape of 75 mm wide, 2 mm thick, having self adhesive, cold applied, polymer modified high tack bituminous to form high strength water proof layer complete all as specified as per manufacturer instructions complete all as specified and as directed.

Repairing the pot holes and edge spalling in concrete slab by cutting the existing concrete slab by machine to average depth not excedding 40 mm and average width/lengh not exceeding 60 mm trimming the surface and application of resin formulation in two stages as given below including preparation of surface complete all as specified and as directed. (a) First Stage consist of application of a primer coat with epoxy resin of mix with formulation of 100 parts of Araldite GY 257 (depend 101 propane epichorihydrin) and 50 part of Hardner Hy 840 by weight. (b) Second stage consist of application of epoxy resin mortar mix with the following formulations :- (i) Araldite GY 257 -100 parts by weight (ii) Hardner Hy 840 - 50 parts by weight. (iii) Quartz sand No.9 - 450 parts by weight.

M&L repairing the concrete surface where aggregates are exposed by following stages complete all as specified and as directed.:- (i) Preparing the surface by steel wire brushes/mechanically grinding the surface to remove all loose materials, mud etc.and clearing the surface by using mechanical air blower before applying primer. (ii) Apply Flex O Patch Special Primer RDL 942 from Choksey or any other equivalent make, over the cleaned surface (iii) Apply the elastomeric concrete minimum depth 3 to 5 mm (Flex O Patch manufactured by Choksey or any other equialent make) within 30 minutes after applying primer and mix proportion as per manufacturers instructions. Note: The works to be carried out as per manufacturers instructions and as directed.

BKR Enterprises (BID ID -3111782)

M/S. SRI RAMANUJA CONSTRUCTIONS (BID ID -3103041)

A.AROCKIA JUSTIN (BID ID -3097534)