Common use of Workability of concrete Clause in Contracts

Workability of concrete. The concrete mix proportions chosen shall be such that the concrete is of adequate workability for the placing conditions of the concrete and can be properly compacted. Following ranges of workability and slump of concrete, measured in accordance with IS: 1199, shall be broadly adopted: Placing conditions Degree of workability Slump (mm) * Mass concrete * Lightly reinforced section in slabs, beams, walls, and columns. * Floor *Footings Low 25-75 *Heavily reinforced sections in slabs, beams, walls, and columns. Medium 50-100 For canal lining, slumps range 50-65 mm is considered adequate. It can be increased unto 75mm, if considered necessary in particular situations for practical usage.