water bound macadam sub-base/base (a) w.b.m. grade-2 providing laying, spreading and compactong stone aggregates of specific sizes to water bound macadam specification including speading in uniform thickness, hand packing, rolling with three wheel roller 80-100 kn static roller in stages to proper grade and camber, applying and brooming, crushable screening to fill-up the interstices of coarse aggregate, watering and compacting to the required density grading 2 as per technical specification clause 405 (2).
