<p>SBBC(70:30): Providing compacted aggregate sand sub-base course with 38mm down brick chips made of 1st class picked brick (LAA value not exceeding 40) 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 Brick Chips 38mm downgraded 25% and 20mm downgraded 45% with 30% sand) 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 by 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>