用煤矸石炉渣取代天然砂的混凝土性能研究

Study on Properties of Concrete with Coal Gangue Slag to Replace Natural Sand

采用煤矸石炉渣等量替代天然细集料,制备了掺煤矸石炉渣的水泥混凝土.结果表明:在混凝土中用一定量的煤矸石炉渣替代天然砂,可配制出强度等级为50MPa以上的混凝土,其28d抗压强度和耐久性能均高于同配合比的基准混凝土;随着煤矸石炉渣掺量的增加,混凝土坍落度降低;掺煤矸石炉渣水泥混凝土的体积安定性满足国家标准.

Concrete with coal gangue slag to replace natural sand was prepared for the purpose of harmless management, resources utilization and industrialization of coal gangue slag. Experiment results show that the compressive strength of concrete adding proper quantity of coal gangue slag reaches 50 MPa, which is higher than the standard concrete. With increasing of coal gangue slag, the slump of the concrete decreases. The durability of concrete adding proper quantity of coal gangue slag is much better than that of normal concrete.