Repairs to certain roads at Khundru Garrison under GE 861 EWS

Scarifying or picking gravelled macadem or bituminous macadam surfaces in area not exceeding 400 Sqm and depth not exceeding 50mm deep with and including removing and stacking the excavated material accounted thereof under credit, complete all as specified and directed.

M&L preparing unsurfaced WBM surfaces by brushing with wire brushes for removing caked mud etc sweeping with brooms and finally fanning the cleaned surface with gunny bags or mechanical air compressor to remove all loose dirt etc, and applying evenly a priming coat/ tack coat with bitumen of grade VG-10 @ 10 Kg/ 10 Sqm, complete all as specified and directed.

M&L Premix bituminous, macadam with paving bitumen binder content of paving bitumen of grade VG-30 not less than 4% by weight of total mix (the exact quantity of binder shall be determined by design mix by Marshal method) laid/rolled and compacted to required gradient and camber (consolidated thickness 75mm or less) using 10 to 12 Tonne power roller, complete all as specified and directed. Notes :- (a) Premixed Bituminuous Macadam shall be laid using self propelled hydrostatic paver finisher and preparation of mix shall be using hot mix plant and transporting the mix in tipper. (b) The exact bitumen content required shall be determined follwing the Mix Design procedure contained in the Asphalt Institute Manual MS-2 (Sixth Edition) as referred in case 3.5.3 of IRC 111:2009. The adjustment in rate due to variation in quantity of bitumen if any shall be priced at the rate of Rs. 60.00 Per KG of bitumen.

Repairs to potholes any depth, not exceeding 01 Sqm each including sweeping free from dust and mud, or water, scoring sunken surfaces in roads, paths, etc. cutting around edges to atleast 25mm in depth, making good by filling in screened and graded road metal, watering and well ramming (including supply of road metal) and making good by applying tack coat using paving bitumen of grade VG-10 @ 5 Kg per 10 Sqm putting in pre-mixed and sealed with binder of grade VG-30 @ 9.8 Kg per 10 Sqm binded with 0.09 cum of stone chippings 6.3mm size and again well rammed (including supply of premixed macadam, binder and chippings), depth of potholes exceeding 30mm complete all as specified and directed.

Preparing existing black top surfaces by brushing with wire brushes for removing caked mud etc. sweeping with brooms and finally fanning the cleaned surface with gunny bag or mechanical air compressor to remove loose dirt applying evenly a priming/ tack coat on existing black top surfaces with bituminous primer @ 05 Kg per 10Sqm of paving bitumen of grade VG-10, complete all as specified and directed.

M&L bituminous premix asphaltic semi dense concrete (SDAC) 40mm thick (consolidated thickness) with 5.5% binder content of paving bitumen of grade VG-30 by weight of total mix, rolled and compacted to required camber and gradient using 10 to 12 tonne power roller and laying with mechanical paver, complete all as specified and directed. Notes :- (a) Bituminous premix semi dense asphaltic concrete shall be prepared in central computerised hot mix plant. (b) Design mix shall be got done by the contractor at his own expenses from NABL laboratory as decided by GE. (c) Contractor shall quote his rates by considereing binder contents @ 5.5% of total mix by weight, however in case of any variation in weight of binder contents on lower side as per actual mix design, the same shall be ajusted @ Rs. 60.00 Per Kg of bitumen.

M&L preparing bituminous surfaces of road and marking 2.5mm thick centre lines, stop lines, dashes, arrows etc. and the like not exceeding 10cm wide on roads pavements with hot applied thermo plastic road marking paint of approved colour confirming to BS 3262-1989 with special applicator machine all as per manufacturer's instructions including traffic diversion arrangement complete all as specified and directed.