WBPWD/EE/NIT-12/25-26/Sl-1

Dressing and chilchalling Road flanks including cutting and filling with earth up to 150 mm average thickness finished with outward cross grade of 1 in 30. (Extra quantity of earth for filling shall be obtained from road side borrow pits.)

Patching of potholes by draining water, cutting the pothole area to rectangular shape with vertical edges, removing all loose materials, screening and stacking the same for reuse with new materials as per requirement, filling the pothole area with additional volume of crushed stone materials / laterite / Jhama / broken shingles / coated stones of Pakur variety etc. and screenings as applicable, and compacting the same with static roller as per Water Bound Macadam Specification, including cost of all materials and machineries. Using Pakur Variety Materials (Grade - II aggregates 1.00 cum/cum and Type-B Screening 0.21 cum/cum).

Repairing pot-holes and making up small depressions with ramming or power rolling including screening, cleaning chips or metals and washing, drying as necessary and heating the chips or metal where necessary, cutting pot holes to regular shapes with vertical edges, cleaning the disintegrated materials, heating matrix and applying tack coat (including sides), finishing the top of repaired surface levelled with adjoining area, including cost and carriage of stone aggregates and matrix, excluding cost of applying tack coat. [Tack coat is to be considered separately]. With premixed Chips or Bajrees with 54 kg of bitumen per m3 of loose net volume of stone chips using concrete mixer machine. (The payment is to be made on the basis of loose net volume of stone materials consumed in the work). Using Mobile HMP (Light duty). Using Pakur Variety Stone Materials and Packed VG-30 Bitumen.

Providing and laying Bituminous Profile Corrective Course using Mobile Hot Mix Plant (Light Duty) and using aggregates of Grading-2 of Table-33 premixed with 75kg of bitumen per cum, transported to site laid over a previously prepared surface at specified laying temperature to the required grade, level and alignment, 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 direction of Engineer-incharge.

Providing & Laying 20 mm thick Mix Seal Surfacing (MSS) Providing, laying and rolling of close graded premix surfacing using materials of 20 mm thickness composed of 11.2mm to 0.09mm (For Type – A) or 13.2mm to 0.09mm (For Type – B) aggregates using penetration grade bitumen to the 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 and finishing to required level and grade etc. including all other incidental charges, quality control as per clause 508 of specifications for Road & Bridge Works of MoRT&H (5th Revision) complete. (b) Type – B : Using 1.9 kg bitumen per square meter surface area : i) Using Hot Mix Plant not less than 75 T / Hr.

Supplying and mixing stable anti- stripping agent of approved quality conforming to Table -A 5 - 1 of Appendix-5 of specification for Road & Bridge Works of MORT&H(Rev-4) to the binder @ 0.5% to 1% by weight of binder (depending up on size & stripping value of the aggregates ) and allowing 15 to 30 minutes of circulation or stirring in the hot bitumen tank to ensure a homogeneous mix of binder and anti- stripping agent for different bituminous works as per Technical Specifications in given n Appendix -5 of specification for Road & Bridge Works of MoRT&H (Rev-5) and direction of Engineer-in- Charge complete

Prime Coat 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 @ 0.85 kg/sqm). Using SS-1 Type packed bituminous emulsion.

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).(ii) On Granular surfaces treated with primer (Using Bitumen emulsion at the rate of 0.25 to 0.30 kg per 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). On Bituminous surfaces treated with primer (Using Bitumen Emulsion at the rate of 0.275 kg per sqm). Using RS-1 Type packed bituminous emulsion.(i) On Bituminous Surface (Using Bitumen Emulsion at the rate of 0.20 to 0.30 kg per sqm.)

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