SPECIAL REPAIR TO TARMAC NEAR SHELTER NO 28 AT AF STATION TAMBARAM

Amount

Demolition of cement Concrete (Unreinforced) of any description and in any position not otherwise specifically provided for

Removing Debris and rubbish obtained from demolitions (cement concrete) exc. 1.50 km but n exc.5 km complete all as specified and directed

Rolling and consolidation in formation surface to required gradient and camber using power roller exceeding 8 tonne but not exceeding 12 tonne complete all as specified as directed by Engineer-in-Charge.

M&L for 100 mm thick (compacted thickness) wet mix Macadam (WMM) with mechanical paver as per MORTH specification laid in single layer, spread, rolled and consolidated to gradient and camber as required including necessary laterial support and form work if required using crushed stone aggregated of specified grading (53 mm to 70 micron) complete all as specified and directed

M & L for 100 mm thick (compacted thickness) dry lean concrete (DLC) Design mix M15 grade in single layer with 7 days compressive strength as 10N/Sqmm with minimum cement (OPC) content 240 Kg/Cum of concrete with necessary joints as per MORTH specification all as per IRC SP 49-1998 including necessary formwork if required, rolling and consolidate to required gradient and camber complete all as specified and directed. NOTE: In the event of increase in cement content as per design mix formula, nothing extra shall be admissible and quoted rate shall deemed to be inclusive of above

M&L for applying evenly using pressure sprayer a tack coat of VG-10 with 2.5 kg per 10 sqm over dry lean concrete

Supply and spread sand layer of zone II of 20mm thick (compacted thickness) including watering and consolidation all as specified.

M & L for two layer of polythene film (Black colour) 400 micron thickness as per ASTM D2103/IS 2508 laid over sand layer with necessary lap complete all as specified and directed. Note:- (a) Two layer of film sall be measured as one unit Sqm. (b) Side lap of 150mm and end lap of 300mm shall be provided wherever required. The rate quoted shall be deemed be inclusive of above provision. (c) Clear area (without lap) only shall be considered for payment purpose and nothing shall be allowed for laps. (d) Sand layer shall be measured and paid separately under relevant item

M & L for 240mm thick design mix pavement quality concrete (PQC) of minimum flexural strength of 44 Kg/Sqcm (RMC) using minimum cement content @ 400kg/Cum with non circular fibre synthetic reinforcement including necessary formwork finishing the surface of concrete pavement and using cement as per the design mix making good the surface with brooming impression on the top of PQC flooring all as specified and directed. Note:- (a) Synthetic reinforcement fibre shall be measured and paid separately under relevant item.

Supply only recron synthetic reinforcement fibre

Forming construction joint, 10mm wide and 28mm deep (using diamond cutter) and provision of polyethylene backup rod and sealed with sealing compound Polyurethane based sealant 'Colpor '200/equivalent and debonding / strip / rod at bottom and coat of bituminous paint for full depth of pavement maximum distance between the joints 4m and priming the sides, and applying masking type on edge of joint to prevent accidental spillage of sealent on top surfaces and removing the masking tape after is applied complete all as specified and as directed.

Forming 20mm thick expansion joints for 240mm thickness of concrete slab filled with preformed bituminous filler board, appling bond breaker tape on top of filler board for complete width of joint, provision of polyethylene backup rod and filled with polyurethane sealed (min depth of sealant above backup rod shall be 20mm ) priming the sides and applying masking tape on edge of joint to prevent accidental spillage of sealent on top surfaces and removing the masking tape after is applied complete all as specified and as directed.

Forming contraction(Dummy) joints of 24mm deep x 8mm wide ( Using diamond cutter) filled with expanded polysterene foam applying bond breaker tape on top of polythene foam for complete width of joint, provision of closed cell polyethylene backup rod and sealed with 8mm thick sealing compound Polyurethane based sealant 'Colpor '200/equivalent and debonding / strip / rod( depth minimum above backup rod ) priming the sides,masking tape on edge of joint to prevent accidental spillage of sealent on top surfaces and to give a neat finish to the sealent and removing the masking tape after is applied complete all as specified and as directed.

M&L for 100 mm dia HDPE pipe PN-10 complete all as specified and directed

K T ASSOCIATES

AFSON ENGINEERS & CONTRACTORS

NITYA NAND AND SONS CONTRACTORS PVT LTD