A COMPOSITION OF CONCRETE MORTAR WHICH USED WASTE CONCRETE

摘要

A concrete mortar composition is provided to reduce environmental pollution caused by dust, to decrease the cost required for treating waste, to allow a reduced amount of sand or aggregate, and to increase the strength of concrete. A concrete mortar composition comprises: 10-20 parts by weight of cement; 25-30 parts by weight of sand; 4-8 parts by weight of stone powder or soil powder or blast furnace slag; and 0.08-0.1 parts by weight of an admixture. The stone powder o soil powder comprises sand and dust remaining after removing foreign materials during treatment of waste concrete. The stone powder or soil powder is mixed with blast furnace slag in a ratio of 1:1 and the particle size is 300-350 mesh. Further, the admixture is lignin sulfonic acid.