construction of dry lean cement concrete sub base over a prepared sub grade with course and fine aggregate conforming to is:383 the size of course aggregate not exceeding 25mm, aggregate cement ratio not to exceed 15:1 aggregate gradation after blending to the as per specifications, cement content not to be less than 150 kg/cum, optimum mositure content to be determined during trial lenght construction, concrete strenght not to be less than 10mpa at 7 days mixed in a batching plant transported to site for all leads and days mixed in a batching plant, transported to site, for all leads and lifts laid with a mechnical paver compacting with 8 to 10 turn vivratory roller, finishing and curing, complete as per direction of engineer-in- charge.(dsr no.16.80)
