Providing, laying and rolling of built-up-spray grout layer over prepared base consisting of a two layer composite construction of compacted crushed coarse aggregates using motor grader for aggregates. key stone chips spreader may be used with application of bituminous binder after each layer, and with key aggregates placed on top of the second layer to serve as a Base conforming to the line, grades and cross-section specified, the compacted layer thickness being 75 mm. By manual means using bitumen 60/70.
2
Providing, laying and compacting Granular Base/Sub base with naturally occuring Sand Gravel Material free from organic ore other deleterious constiuent spreading with motor grader and compacted by rolling with power roller of 8-10 capacity in layers not exceeding 150 mm (spread thickness).
3
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 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. A) By manual means. i)Grading-Ia) Using Screening Crushable type such as Moorum or Gravel
4
ii)Grading-II (Aggregate size- 53mm to 22.4mm). b) Using Screening Type-B (11.2mm agg.)
5
Providing and applying primer coat with bitumen emulsion on prepared surface of granular Base including clearing of road surface and spraying primer at the rate of 0. 70 kg/sqm using mechanical means.
6
Providing and applying tack coat with bitumen emulsion using emulsion pressure distributor at the rate of 0.25 kg per sqm on the prepared bituminous surface cleaned with mechanical broom.
7
Providing and laying bituminous concrete with higher capacity batch type hot mix plant using crushed aggregates of specified grading, premixed with bituminous binder @ 5.2 per cent of mix and filler, transporting the hot mix to work site, laying with a hydrostatic paver finisher with sensor control to the required grade, level and alignment, rolling with smooth wheeled, vibratory and tandem rollers to achieve the desired compaction as per MORTH specification clause No. 507 complete in all respects. ii) for Grading-II ( 13 mm nominal size). a) VG-30
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