REPAIRS / MICROSURFACING / RESURFACING TO ROADS IN MADAMBAKKAM, NARENDRA PLACE AND 9 P AND S UNIT AT AFS TAMBARAM

Demolition of cement concrete (unreinforced) in ground floors and pavings n exc 15 cm thickness below or above ground level complete all as specified and as directed.

M&L for removing all loose soil and gravel from existing pot holes of area n.exc 1 Sqm and up to 30mm depth working by inbuilt-air-jet pressure machine over pressure spray application of tack coat and over providing surface correction and pot hole filling using CSIR-CRRI technology based patch fill or pot hole repair machine by automatic production of on site cold-mix patching material by using cold-mix bitumen emulsion with 4.5% residual bitumen and compaction with vibrating plate compactor for even road profile complete all as specified and directed.

Repair to pot holes any depth not exceeding 1 Sqm each including sweeping free for dust and mud or water, scoring sunken surfaces in roads, paths etc cutting around edges exc 30mm in depth making good by applying tack coat @ 5 kg per 10 sq m, putting in premixed bituminous macadam, well rammed and sealed with binder 9.8 kg per 10 sq m, blinded with 0.09 cum of stone chippings, 6.3 mm size and again well rammed (including supply of premixed macadam, binder and chippings). complete all as specified and directed.

M&L for preparing black top surfaces by brushing with wire brushes for removing caked mud etc. sweeping with brooms and finally fanning the cleaned surface with gunny bags to remove all loose dirt etc and applying evenly a coat of bitumen @ of 5kg/10sqm with paving bitumen complete all as specified and directed.

M&L for Bituminous premix semi asphaltic dense concrete 40mm consolidated thickness with 5.5% binder content by weight of total mix, rolled and compacted to required camber and gradient using paving bitumen of grade VG 30 with power roller 8 to n exc 12 tonne capacity complete all as specified and directed (i) the mix shall be mixed in computerised hot mix plant and laid with mechanical paver only. (ii) The mix shall be designed by job mix formula. (iii) Cost of testing chages, material and transportaion etc for job mix formula and independing testing during execution of work shall be inclusive in the unit rate quoted and no extra pament shall be made on this account. (iv) the actual binder contents used shall be as per optimized content based on approved job mix formula irrespective of whatever indicated above. (v) Price adjustment shall be done on minus side ( without considering the permissible tolerance on minus side) with reference to binder content indicated above and actual to be used in the work. (vi) Price adjustment of paving bitumen shall be done at the rate of Rs 40,000/- per MT for any variation on minus side irrespective of actual purchase rate. However no adjustment for variation on plus side will be made. (vii) The quoted rate includes carrying out designed mix by the contractor. The recommended trial mix got to be approved by the GE.

All as per item No 5 here in above but SDAC thickness 25 mm.

M&L for laying premixed bituminous macadam of consolidated thickness (75mm or less) with paving bitumen any penetration rolled and compacted to required camber and gradient using binder(bitumen VG-30) content 4 % by weight of total mix complete all as specified and directed. Note: The specifications of bituminous macadam shall be as per Para 20.B.3 of SSR Pt-I complete all as specified and as directed.

M&L for preparing bituminous surfaces of road and marking 2.5mm thick centre lines, stoplines, dashes, arrows etc. and the like on old and new roads pavements with hot applied thermo plastic road marking paint of approved colour confirming to BS 3262-1989 using application unit and including retro reflective glass beads @ 250 to 300 gm /sqm to withstand vehicular traffic load with special applicator machine all as per manufacturers instruction including cleaning of all dirt, scales, oil, grease and foreign material etc complete all as specified and directed.

M&L for scarifying or picking gravelled, macadam or bituminous macadam surfaces in area exc 400 sqm not exc 50 mm and preparation of surfaces by brushing with wire brushes for removing caked mud, dirty particles, old paint etc sweeping with brooms and finally fanning the cleaned surface with air compressor to remove all dirts etc. on black top or concrete surfaces and all cracks filling with crack filling compound complete all as specified and directed.

M&L for cement concrete 1:3:6(40mm graded stone aggregate)75 mm thick in subbase, finished cement surfaces even and smooth complete all as specified and as directed.