关键词: 煤矸石混凝土;吸水特性;荷载水平;煤矸石骨料

Abstract: In order to investigate the effect of coal gangue aggregates partially replacing traditional coarse aggregates on the water absorption capacity of concrete , the gangue concrete specimens with 30％ordinary coarse aggregates replaced by coal gangue , the gangue concrete specimens with 60％ ordinary coarse aggregates replaced by coal gangue were tested in water absorption experiment under sustained compressive load , and the traditional aggregate concrete specimens were also tested as reference .The effects of the load level and the contents of the coal gangue aggregates on the water absorption were analyzed .The results show that the water absorption capacity of the concrete specimens is remarkably influenced by the load level , when the load level is low , the water absorption capacity of the specimen decrease slightly , while when the load level increased to 60％, the water absorption capacity of the specimen gone up obviously .And the water absorption capacity of the gangue concrete specimens with 30％ordinary coarse aggregates replaced by coal gangue is similar to that of the traditional concrete specimens .The slag concrete with 30％coal gangue aggregates has little effect on the water absorption of the concrete , while the slag concrete with 60％coal gangue aggregates would influence the durability of the concrete .

Key words: slag concrete;water absorption;load level;coal gangue aggregate