WBMAD/ULB/HM/NIT-3e/2026-27 SLNO 2

WB PWD NH Page No -103, ITEM No -9A(ii)(b) Water Bound Macadam Providing, laying, spreading and compacting stone aggregates 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-2 (Table 400-9) Using Screening (Table 400-10) Type-B (11.2 mm aggregate)1

WB PWD NH Page No -110 ITEM No -1(A)(i) 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 @ 0.70-1.0kg /sqm.

WB PWD NH Page No -111 ITEM No -2(A)(ii) Tack Coat Providing and applying tack coat with Cationic bitumen emulsion (RS1) 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 @

WB PWD NH Page No -112,ITEM No -3(ii) Bituminous Macadam Providing and laying bituminous macadam with 100-120 TPH hot mix plant using crushed aggregates of specified grading premixed with approved bituminous binder @ 3.3% (min) for Grading -1 and 3.4% (min) for Grading -2 by weight of total mix, transported to site, laid over a previously prepared base with paver finisher to the required grade, level and alignment and rolled as per clauses 501.6 and 501.7 to achieve the desired compaction (Reference to MORT&H's specification clause 504). 3 (ii) for Grading II (19 mm nominal maximum aggregate size) Layer Thickness 50-75mm

WB PWD NH Page No -111 ITEM No -2(A)(i) Tack Coat Providing and applying tack coat with Cationic bitumen emulsion (RS1) 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). i) On bituminous surface @ 0.20kg0.3kg /sqm.

WB PWD NH Page No -119 ITEM No -10(i) Open - Graded Premix Surfacing 10(i) Case - I: Mechanical method using approved grade Bitumen and HMP of appropriate capacity not less than 75 tonnes/hour. sqm 20.30 Note If a premix sand seal coat of ‘B’ type is proposed, the same is required to be provided over the open graded premix carpet immediately on the same day. As the same HMP and other (Contd.) Item Labour, T&P, Machinery etc. Remarks Serial No. Providing, laying and rolling of open - graded premix surfacing of 20 mm thickness composed of 13.2 mm to 5.6 mm aggregates either using viscosity grade bitumen of approved grade to 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 tandem or other approved type roller 8-10 tonne capacity, finished to required level and grades (Reference to MORT&H's specification clause 510). Case - I: Mechanical method using approved grade Bitumen and HMP of appropriate capacity not less than 75 tonnes/hour.

WB PWD NH Page No -120 ITEM No -12(ii) Providing and laying seal coat sealing the voids in a bituminous surface laid to the specified levels, grade and cross fall using. Type A and B seal coats (Reference to MORT&H's specification clause 511). Case-II Type-B Providing and laying of premix sand seal coat with HMP using approved crushed stone chipping and viscosity grade paving bitumen of suitable approved grade

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