WBPWRD/AE/BHTHSD/eNIT06/26-27

Water Bound Macadam : Providing laying, spreading and compacting stone aggregates of specific sizes in 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-1 By Mechanical Means : Using Screening (Table 400-10) Type-A ( 13.2mm. aggregagte).

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) i) On WMM/WBM surface @0.85Kg/Sqm. Using Cationic Bitumen Emulsion SS-1.

Tack Coat Providing and applying tack coat with Cationic bitumen emulsion (RS-1) complying with IS:8887 using emulsion pressure distributor on the prepared bituminous/ granular/cement concrete pavement surface cleaned with mechanical broom and high pressure air jet (Reference to MORT&H's specification clause 503). ii) On bituminous surface treated with primer @0.25kg/sqm. Using Cationic Bitumen Emulsion RS-1.

Tack Coat Providing and applying tack coat with Cationic bitumen emulsion (RS-1) complying with IS:8887 using emulsion pressure distributor on the prepared bituminous/granular/cement concrete pavement surface cleaned with mechanical broom and high pressure air jet (Reference to MORT&H's specification clause 503). ii) On Granular surface treated with primer @0.275Kg/Sqm. Using Cationic Bitumen Emulsion RS-1.

Filling Pot Holes with Bituminous Macadam using Mobile Mix Plant (6-10 TPH) with approved crushed aggregate of specified grading premixed with bituminous binder @3.4% by weight of the total mix, transported to site and laid in the pot holes prepared before hand by cutting the edges to get a firm vertical face and by removing all the falled and loose materials including dust and applying tack coat evenly on the sides and on the surface as per specification, rolling the filled depressions with 8-10 tonne smooth wheeled roller to achieved the desired compaction, including the cost and carriage of stone aggregates and bitumen, hire charges of machinery and equipment, cost of fuel and luibricants and wages of operational staff, quality control including the cost of tack coat complete as per direction of Engineer-in-Charge. Payment to be made on the basis of the loose net volume of stone aggregates used in the work. [ Materials required kper cum : 20mm size @0.07m3, 13.2mm size @0.33m3, 5.6mm size @0.65m3, 2.36mm size @0.21m3, 300mm micron size @0.08m3, 75 micron size @0.08m3, bitumen @75kg/m3]

Providing, laying and rolling of open graded premix surfacing of 20mm thckness composed of 13.2mm to 5.6mm. Aggregates either using penetration grade bitumen or cutback or emulsion of required line, grade and level to serve as wearing course on a previously prepared base, including mixing in a suitable plant, laying and rolling with a smooth wheeled roller 8-10 tonne capacity, finished to required level and grades (Reference to MoRT&H's specification clause 510).

Providing and laying seal coat sealing the voids in a bituminous surface laid to the specified levels, grade and cross fall using Type B seal coat [Reference to MORT&H's specificationclause 511]. Type B seal coat [Materials required per sqm. 2.36mm to 90micron size @0.006m3 per m2 & bitumen @ 0.68kg/sqm.].

GST @ 18% over Sl. No. 1 to 7