Short term Improvement and Routine Maintenance from km. 40.000 to km. 61.100 of NH-717A in the State of West Bengal on Item Rate basis

ROAD MAINTENANCE

Clearance of land slides in soil and ordinary rock by a bull-dozer D 80 A-12, 180 HP and disposal of the same on the valley side.

Labour for laying 150 mm to 200 mm boulder soling including rough dressing hand packing and ramming down small pieces in the interstics including rolling and preparing the bed to proper level and filling up all joints with sandy clay or earth.

Labour for Spreading and consolidating stone metals of specific sizes in hard crust to requisite thickness (measured after compaction) in layers including creening of bats/ metals etc. as necessary, spreading manually or with the help of motor grader, sweeping, watering and rolling in stages with power roller to proper line, grade and camber, spreading and sweeping requisite type and quantity of screening materials to fill up the interstices of coarse aggregates, applying binding materials as directed,including lighting, guarding, barricading and making necessary earthen bundh of one metre width on each side where necessary to protect edges and preparing the bed by necessary cutting or filling and rolling all complete including the cost of all materials and hire and labour charges of all men and machineries and as per specification and direction of Engineer-in-charge but excluding cost of stone material. With coarse aggregate size range 53-22.4 mm (Grading-III) with Type-B Screening for 75 mm compacted thickness.

Providing and applying primer coat with Cationic Bitumen Emulsion of approved grade conforming to IS: 8887-1978 and requisite quantity on prepared surface of granular base including cleaning of road surface and spraying primer using Mechanical means including cost and carriage of bitumen emulsion and all other incidental costs of work complete as per Clause 502 of Specifications for Road & Bridge Works of MoRT&H (5th Revision). For WBM / WMM Surface:(with primer @ 0.70-1.0 kg/sqm)

Providing and applying tack coat with Cationic Bitumen Emulsion of approved grade conforming to IS: 8887-1978 on the prepared surface cleaned with Hydraulic broom, moistening the surface including cost and carriage of emulsion, hire charges of machinery and labour, cost of fuel and lubricants all complete as per Clause 503 of Specifications for Road & Bridge Works of MoRT&H (5th Revision). By manual means On Bituminous Surface (Using Bitumen Emulsion at the rate of 0.20 to 0.30 kg per sqm.)

Providing and laying bituminous macadam with Mobile Hot Mix Plant (Light Duty) using approved crushed aggregates of specified grading as per Table 500.7 premixed with bituminous binder, transported to site laid over a previously prepared surface at specified laying temperature by means of approved and suitable arrangements to the required grade, level and alignment and rolled with suitable power roller for break down, inter-mediate and finished rolling as per specification to achieve the desired compaction including cost and carriage of stone materials and bitumen, hire charges of machinery and equipment, cost of fuel and lubricants and wages of operational staff, quality control complete as per Specifications for Road &Bridge Works of MoRT&H (5th Revision). For Grading 2 (19 mm nominal size, 50-75 mm thick.)

Providing and laying bituminous concrete with Hot Mix Plant using coarse aggregates, fine aggregates, filler materials and bituminous binder of required specification including screening, cleaning of chips and preparing a uniform and quality mix in Hot Mix Plant and ensuring a homogeneous mix, in which all particles of the mineral aggregates are coated uniformly, transporting the hot mix to work site, laying the mixed materials at specified laying temperature with a hydrostatic paver finisher with sensor control to the required grade, level and alignment over prepared surface coated with tack coat, rolling with smooth wheeled, vibratory and tandem rollers for break down, inter-mediate and finished rolling to achieve the desired density of at least 98% of that of Laboratory Marshall specimen, including cost and carriage of bitumen, coarse and fine aggregates and filler materials and hire charges of machinery and equipment for construction and quality control, fuels and lubricants and wages of operational staff complete as per Clause 507 of Specifications for Road & Bridge Works of MoRT&H (5th Revision). 12mm thick by mechanical means With Cationic Bitumen Emulsion (@ 10.50 kg / 10 sqm.)

Spreading of sand over the bituminous surface @ 0.003 m3 per m2 of surface from the road side stacks and carriage of the same up to a distance of 150 m from stack complete including cost of sand.

PASANG LAMA AND SONS