WBPWD/EE/BANKURA DIVISION SL-4

Water Bound Macadam Base Course Providing, laying, spreading and compacting stone aggregates of specific sizes to water bound macadam specification including spreading in uniform thickness, hand packing, rolling with 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 including lighting, guarding, barricading and making necessary earthen bundh of one metre width on each side and preparing the bed by necessary cutting or filling, including cost of all materials and hire and labour charges of all men and machinery and compacting to the required density, as per Clause 404 of Specifications for Road & Bridge Works of MoRT&H (5th Revision). (iii) Grading-II Aggregate (53 mm to 22.4 mm) Using Stone Screening Type B (11.2 mm) B. Manual Means

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] [Payment to the Contractor is to be made on the basis of loose net volume of coarse aggregate only excluding key aggregates] i) 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 Pakur variety Stone chips of size 22.4 mm @ 0.600 cum/cum, 11.2 mm @ 0.400 cum/cum & bitumen @ 54.0 kg/cum (b) Using Mobile HMP (Light duty)

Dense Bituminous Macadam Providing and laying dense bituminous macadam with Hot Mix Plant using crushed aggregate of specified grading , filler ( Cement/ hydred Lime/rock dust) premixed with bituminous binder of approved grade @ 4.0 % (min) for grading--1 and @ 4.5 % (min) for grading-2 by weight of total mix as per table 500-10 and mixed design done as per table 500-11 and Job Mix formula as per clause 505.3.3 of MoRT&H (5th Revision). including screening, cleaning of chips transporting the hot mix to work site, laying the mixed materials at specified laying temperature as specified in table 500-2 with a hydrostatic paver finisher with sensor control to the required grade, level and alignment over prepared surface coated with the tack coat, rolling with smooth wheeled and vibratory or tenden rollers or with pneumatic tyre roller of 12 to 15 tonne weight with a tyre pressure of at least 0.56 MP, to achived the desired density as per clause 505.3.5, all including cost and carriage of bitumen, crushed aggregates, filler materials and hire charges of mechinery and equipment for construction and 2quality control complete as per clause 505 of Specifications for Road & Bridge Works of MoRT&H (5th Revision). B. For Grading 2 (26.5 mm nominal size, 50-75 mm thick.) (i) Using Batch Type HMP of minimum capacity 100-120 TPH.

Bituminous Concrete Providing and laying bituminous concrete with Hot Mix Plant using crushed aggregate, filler material ( Cement/ hydred Lime/rock dust) and premixed with bituminous binder of specified Grading @5.2 % (min) for grading--1 and @ 5.4 % (min) for grading-2 as per table 500-17 and mixed design done as per table 500-10 and Job Mix formula as per clause 505.3.3 . including screening, cleaning of chips and preparing a uniform and quality mix transporting the hot mix to work site, laying the mixed materials at specified laying temperature as specified in table 500-2 with a hydrostatic paver finisher with sensor control to the required grade, level and alignment over prepared surface coated with the tack coat, rolling with smooth wheeled and vibratory or tenden rollers or with pneumatic tyre roller of 12 to 15 tonne weight with a tyre pressure of at least 0.56 MP, to achived the desired density as per clause 505.3.5, all including cost and carriage of bitumen, crushed aggregates, filler materials and hire charges of mechinery and equipment for construction and quality control complete as per clause 507 of Specifications for Road & Bridge Works of MoRT&H (5th Revision). B. For Grading 2 (13.2 mm nominal size, 30mm/40 mm thick.) (i) Using Batch Type HMP of minimum capacity 100-120 TPH.

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). (i) For WBM / WMM Surface: (with primer @ 0.85 kg/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). (ii) On Granular surfaces treated with primer (Using Bitumen emulsion at the rate of 0.275 kg per sqm.)

(i) On Bituminous Surface (Using Bitumen Emulsion at the rate of 0.25 kg per sqm.) By manual means

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.

Cutting kutcha drain of 600 mm wide and depth up to 300 mm, including disposal of excavated material in embankment slopes within a lead of 50 m. (a) Through ordinary soil.