Public Works Roads Department Tender

Granular Sub-Base with Graded Material (Table:- 400-1) By Mix in Place Method Construction of granular sub-base by providing graded materials such as natural sand/crushed gravel/crushedstone/combination depending upon the required grading, spreading in uniform layers with motor grader on prepared surface, mixing by mix in place method with rotavator and compacting with vibratory roller to achieve atleast 98% of the maximum dry density for the material determined as per IS:2720 (Part B), complete as per clause 401 desired density, complete as per clause 401. (Use North Bengal Variety Stone Aggregates) Grading-II

Water Bound Macadam: Providing, laying, spreading and compacting stone aggregate (NB Variety)of specific sizes to water bound macadam specification including spreading in uniform thickness, hand packing, rolling with 3 wheeled steel/vibratory roller 8-10 tonnes in stages to proper grade and camber, applying and brooming requisite type of screening/binding materials to fill up the interstices of coarse aggregate, watering and compacting to the required density (Reference to MORT&H's specification 404). Grading-II

Prime Coat: Providing and applying primer coat with cationic bitumen emulsion SS1 grade conforming to IS:8887 on prepared porous granular surface including clearing of road surface and spraying primer using mechanical means (Reference to MORT&H's specification clause 502). On WMM/WBM surface @ 0.70kg /sqm. Use Bitumen Emulsion (MS type)

Providing and applying tack coat with bitumen emulsion using emulsion pressure distributor on the prepared bituminous/granular /cement concrete pavement surface @ of 0.20/m² cleaned with mechanical broom (Reference to MORT&H's specification clause 503). Use Bitumen Emulsion (MS type)

Bituminous Mecadam - Grading-II Bituminous Macadam using Mobile Hot Mix Plant: 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). WITH NORTH BENGAL VARIETY - Use VG-30 Pkt Bitumen

Open-Graded Premix Surfacing using Bituminous Binder and Mobile Hot Mix Plant (Light Duty) : Providing, laying and rolling of Open - graded premix surfacing of 20 mm thickness composed of 13.2 mm (@ 0.018 m³ per m²) and 11.2 mm (@ 0.009 m³ per m²) size stone aggregates, including thoroughly cleaning of the surface, screening, cleaning and pre-heating stone chips and fully pre-coating the same either using viscosity grade paving bitumen or cut-back or emulsion, carrying the mixture by any suitable arrangements, laying the mixture uniformly over the surface, including line, grade and level to serve as wearing course on a previously prepared base, including mixing in Mobile Hot Mix Plant (Light Duty) and thoroughly rolling with a smooth wheeled roller 8-10 tonne capacity, finished to required level and grades including the cost and carriage of stone chips and matrix, heating the matrix, preheating the aggregates to required temperature and including the hire charges of Mobile Hot Mix Plant (Light Duty) and other machinery, pay of operators, cost of fuel and lubricants etc. complete to be followed by seal coat of either Type A or Type B as per Technical Specification. WITH NORTH BENGAL VARIETY STONE CHIPS - Use VG-30 Pkt Bitumen

Providing and laying Premixed Seal Coat (Type B) with approved quality sand/grit @ 0.6 m3/ 100 m2 and bitumen binder on thoroughly cleaned black top surface coated with tack coat, including heating and mixing cleaned sand/grit (100 % passing through 2.36 mm sieve and retained on 180 micron sieve) uniformly with bitumen binder, laying and spreading the mix at an uniform rate using suitable means, brushing the surface, if necessary, to ensure uniformity, followed by rolling with power roller including the cost and carriage of binder and aggregates, cost of heating the binder and aggregates and all other incidental charges, cost of fuel and lubricants, including hire charges of machineries, tools & plants required for construction and quality control complete as per Clause 511 of Specifications for Road & Bridge Works of MoRT&H (5th Revision). Use VG-30 Pkt Bitumen