Method of mix proportion design for concrete with machine-made sand

As many differences with natural sand in particle shape, surface characteristics and grading, especially in larger content of stone powder, machine-made sand has the important effects on the workability of fresh concrete and the strength of hardened concrete. By reviewing the formerly experimental results of concrete with machine-made sand, this paper gives out the comprehensively table including the effective test data for statistical analysis. The unified formula is proposed to calculate the water to cement ratio of the plastic, pasty and flowing concrete. The design procedure for mix proportion of concrete with machine-made sand is suggested considering the reasonable content of water, sand ratio and stone powder in machine-made sand.