WBPWRD/EE/DHHD/NIT-24/25-26/1

Maintenance of Non-bituminous Base and Sub-Base or WBM Road: 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 Grade-2 Stone Aggregates @1.00m3/m3 & Stone Screenung Type-B @ 0.21m3/m3. (The payment is to be done based on loose net volume of coarse aggregates only.)

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. With premixed S/Chips of 22.4 mm 0.60m3/m3 & S/Chips of 11.2 mm @ 0.40m3/m3 with 54 kg of bitumen per m3 of loose net volume of stone chips using Mobile Hot Mix Plant (Light Duty). (The payment is to be made on the basis of loose net volume of stone materials consumed in the work). Rate is Exclusive of Cost of Applying of Tack Coat.

Bituminous Macadam using Mobile Hot Mix Plant (Light Duty): Providing and laying bituminous macadam with Mobile Hot Mix Plant (Light Duty) using aggregates of Grading-2 of Table-33 (22.4 mm S/Chips @ 0.4241m3/m3, 13.2 mm S/Chips @ 0.2827m3/m3, 11.2 mm S/Chips @ 0.3535m3/m3, 5.6 mm S/Chips @ 0.2121m3/m3 & Stone Dust with Grit @ 0.1414m3/m3) premixed with 75kg of bitumen per cum, 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). Rate is Exclusive cost of applying of Tack Coat.

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: (Using Bitumen Emulsion @ 0.85 Kg/Sq.M.)

Tack Coat: 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 Granular surfaces treated with primer. (Using Bitumen emulsion at the rate of 0.25 to 0.30 kg per sqm.)

Tack Coat: 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 Surface. (Using Bitumen emulsion at the rate of 0.20 to 0.30 kg per sqm.)

Open-Graded Premix Surfacing using Bituminous (Viscosity grade Paving Bitumen / Modified bitumen) 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 using viscosity grade paving bitumen @ 1.46 Kg. per m2, 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 by applying tack coat using Bituminous Emulsion @ 0.25 Kg./m2, 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, matrix and emulsion, 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 Clause 508 for Rural Roads of MORD. Rate is Exclusive of Cost of Applying of Tack Coat.

Seal Coat: 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). By Mechanical Means, over freshly laid 20 mm P.C. With Hot Bitumen Binder (@ 6.80 kg / 10 sqm.)

GST @ 18.00% over Sl. No. 1 to Sl. No. 8

LWC @ 1.00% over Sl. No. 1 to Sl. No. 9

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