WBMAD/ULB/RM/NIT- 2e/26-27/SL4

Water Bound Macadam . 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). . By Manual Means Grading 1 (Table 400-9) . Using Screening (Table 400-10) Type-B (11.2 mm aggregate)

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 @ 0.20-0.30Kg / sqm.

ii) On Granular Surface.

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 (Ref. toMORT&H's specification clause 504). For Grading II ( 19 mm nominal maximum aggregate size) Layer Thickness 50 - 75 mm.

Open-Graded Premix Surface . 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......... 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 - I : Type A (Stone chips 6.7mm size) Providing and laying of liquid seal coat with HMP using approved crushed stone chipping and viscosity grade paving bitumen of suitable approved grade.

GST 18%

CESS 1%