SPECIAL REPAIRS TO INTERNAL ROADS AT RANGAPAHAR

Amount

Material & labour for repairs to potholes of depth n.exc 30mm and area not exc 1 Sqm each including sweeping free from dust and mud, or water, scouring sunken surfaces in roads, paths, etc. cutting around edges to at least 25mm in depth, making good by applying tack coat with bitumen grade VG-10 @ 5 Kg per 10Sqm, putting in premixed bituminous macadam, well rammed and sealed with binder @ 9.8 kg per 10 sqm (using paving bitumen, grade VG-30), blinded with 0.09 cum of stone chippings, 6.3 mm size and again well rammed (including supply of premixed macadam, binder and chippings), rolled with power roller 8 to 10tonne and compacted to required camber and gradient and finishes to a uniform and smooth surfaces complete all as specified and directed. (Note: Paving bitumen VG-10 shall be issued under Sch 'B')

Material and labour 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 priming/ tack coat with bituminous primer @ 5 Kg per 10Sqm using paving bitumen grade VG-10 complete all as specified and as directed. (Note: Paving bitumen VG-10 shall be issued under Sch 'B')

Material and labour for bituminous premix semi dense asphaltic dense concrete 40mm (consolidated thickness) with 5.5% binder of paving bitumen VG-30 grade content by weight of total mix, including cement filler on surfaces rolled and compacted with using 8 to 10 tonne power roller to achive the required compactness , camber and gradient. The mix shall be done using hot mix plant as per design mix and shall be laid by mechanical paver complete all as specified and directed. (Note: (i) The actual binder content shall be as per optimum content based on approved job mix formula with minimum content of 5.5% by weight of total mix (ii) Design mix to be approved by the GE.)

Material and labour for applying evenly a priming/tack coat with bituminous primer @ 2.5 Kg per 10Sqm using paving bitumen grade VG-10 over bituminous surfaces complete all as specified and as directed. (Note: Paving bitumen VG-10 shall be issued under Sch 'B')

Material & labour premix bituminous macadam laid / rolled to required gradient and camber consolidate thickness 50 mm thick (average thickness) with paving bitumen any penetration to on existing surfaces, depression on the existing surfaces and to provide proper camber on road with hot mix bituminous macadam with minimum 4.5% binder content by weight, spreading with mechanical paver and compacting with power driven roller weighing not less than 8 to 10 tones each, and vibratory road roller and super elevation uniform and smooth surface complete all as specified and directed.

Material and labour for painting lines, dashes, arrows, letters etc on roads, pavements and the like exc. 10 cm wide by applying 2.5 mm thick thermoplastic road marking paint of specified shade / colour either continious or broken lines to the required width and length over the existing painted surface / new bituminous surface with solvent based thermoplastic road marking paint using semi automatic thermoplastic paint applicator machine driven by experienced operator on road including all materials, labour, T&P and cleaning dirt, seals, oil, greases and foreign materials etc of road surface complete all as specified and directed. ( Note: Thermoplastic road marking paint shall be applied as per manufacturer's instruction alongwith MORTH technology and speciality.)

Material and labour for applying liquid anti stripping agent (Wet bond) for hot mix ashphalt, use 0.02 to 0.06 % by weight of bitumen (0.2 to 0.6 Kg per MT of bitumen) through direct injection in hot bitumen stream in hot mix plant using an automatic precise dosing device (to be preinstalled in hot mix plant) for renders minimum stripping (breaking) of bonds between the aggregate surface and the bitumen all as per manufacturer's instruction complete all as specified and directed.

Rameshwar Prasad

SHRI BANARSI PRASAD