<p>SBSC(50:50): Providing compacted aggregate sand sub-base course with 38mm down chips made of Crushed Stone (LAA value not exceeding 35) mixed thoroughly with sand of requisite FM (FM not less than 0.8) to obtain a homogeneous mix complying with the specified grading requirement of the relevant item of Road Design standards, (Suggested mixing ratio Crushed Stone 38mm downgraded 25% and 20mm downgraded 25% with 50% sand of total mix) including mixing, carrying, placing and spreading uniformly in appropriate layer to give specified compacted thickness not more than 100mm in a single layer, watering, compacting with 8-10 tonne road roller at OMC±3% to obtain each layer's minimum soaked CBR 50% or Design CBR at minimum compaction 98% of MDD (Modified Proctor), including supplying of all materials, their carriage, labourers tools and equipment etc. all complete as per direction of the E-I-C.</p>