WBSRDA/EE/HOW-1/NIeT/01 of 2026-27 SL 4

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). A) By Manual Means (i) Grading-2(Table 400-9) A (ii) Using Screening (Table 400-10) Type-B (11.2 mm aggregate)

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 @ 0.70-1.0kg /sqm.

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 Granular surface treated with primer @ 0.25kg-0.30 /sqm.

Open - Graded Premix Surfacing (penetration grade/modified bitumen) Binder 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 .

Seal Coat 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.

Cement Concrete Pavement Construction of un-reinforced, dowel jointed, plain cement concrete pavement of specified grade with characteristic flexural strength of concrete not less than 4.5 MPa over a prepared sub base as per clause 602 of MORT&H's specification 2013 and cement content as per clause 602.3.2 , coarse and fine aggregate conforming to IS 383, using fine and coarse aggregates of approved variety combined gradation as per Table 600-3 of MORTH specification 2013, maximum size of coarse aggregate not exceeding 31.5 mm, mixed in a batch mix plant with weigh batching facility as per approved mix design done as per IRC:44, transported to site, laid with a slip form paver with electronic sensor , spread, compacted and finished in a continuous operation including provision of contraction, expansion,construction and longitudinal joints, joint filler, separation membrane, sealant primer, joint sealant as per IRC:57, debonding strip, dowel bar,tie bar, admixtures asapproved, tinning, texturing,curing, finishing to lines and grades as per drawing (Reference to MORT&H's specification 602 along with IRC 15).