REPAIRS, RESURFACING OF CERTAIN ROADS AT TECHNICAL AREAS AT AF STN KALAIKUNDA

Material and Labour for repair to pot holes any depth, not exc 1sqm each including sweeping free from dust and mud, or water, scoring sunken surfaces in roads, path etc cutting around edges to at least 25 mm in depth, making good by filling in screened & graded road metal, watering and well ramming (including supply of road metal) complete all as specified and directed by Engr-In-Charge.

M&L scarifying or picking gravelled, macadam or bituminous macadam surfaces exc 50mm and n.exc 100mm deep and area not exc 400 sqm complete all as specified and as directed.

M&L for 7.5 cm thick (compacted thickness) WBM, with coarse aggregate of granite, trap or basalt of grading 2(63 to 40mm size) or of grading 3 (50 to 20mm size), spread, rolled and consolidated to required gradient and camber with power roller (exc 8 and not exc 12 tonne) complete all as specified and as directed.

Preparing unsurfaced water bound macadam 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 complete all as specified and as directed.

M&L for Applying evenly a priming/tack coat with bituminous primer at 10 kg per 10 sq metre using paving bitumen

Material and Labour preparation of old bituminous/black top surfaces by brushing with wire brushes for removing caked mud etc, sweeping with brooms and finally fanning the cleaned surfaces with gunny bags to remove all loose dirt etc complete all as specified and directed by Engr-In-Charge.

M&L for Applying evenly a priming/tack coat with bituminous primer at 5 kg per 10 sq metre using paving bitumen/Bitumen emulsion.

M&L Premix bituminous macadam with 4% binder content by weight of total mix (using paving bitumen VG-30) laid/rolled and compacted to required graduent and camber rolled/laid with power roller (consolidated thickness 75mm) including preparation of area before laying of macadam complete all as specified and as directed. Note:- i) Exact quantity of binder to beused shall be ascertained by Design mix. ii) Minimum 4% of binder shall be used. However incase more than 4% of binder content isrequiredas per design mix,the same shall be provided by the contractor at no extra cost.

Material and Labour bituminous premix semi-dense asphaltic concrete 40 mm consolidated thickness with 5.5% binder (paving bitumen grade VG-30) content by weight of total mix spread evenly with mechanical paver to desired thickness and to the correct camber, rolled and compacted to required camber & gradient with 8 to 12 tonne power roller/vibratory roller/double drum or tandem roller as suitable complete all as specified and directed by Engr-In-Charge. Note:-i) Premix SDAC shall be shall be procured from a hot mix plant. ii) Exact quantity of binder to be used shall be ascertained by Design Mix as specified. iii) The binder content in the mix shall be minimum 5.5% by weight of total mix. However in case more than 5.5% binder content is required as per design mix, the same shall be provided by the contractor at no extra cost. iv) Binder content and density testing equipment should be readily available at site.

M&L 100 mm thick for moorum/red bajri in formation, berms etc spread and compacted to and rolling shall be done by 8-12 tonne power roller to reqd gradient and camber complete all as specified and as directed.