Mechanical Properties of Some Portland Cement Concretes Made with Coal and Coal Waste as Aggregates

摘要

A bench-scale evaluation of coal and coal waste materials as aggregate materials for use in longwall mine supports was undertaken as part of the Bureau of Mines Health and Safety program on ground control. Performance data were obtained on portland cement concretes (PCC) prepared with coal and coal wastes as aggregate materials. The effects of high-early-strength accelerators on strength and creep and of super-plasticizers on strength properties of PCC formulated with coal and coal waste were investigated.