Effect of pre-wetting degree on microstructure and strength of shale ceramsite concrete

The change of strength of shale ceramsite concrete was researched when shale ceramsite was pre-wetted by means of the distinct degree. Cement paste and interfacial zone between aggregate and mortar for concrete were investigated through the method of SEM. The results show that, with pre-wetting degree increasing, early strength descent scope is greater than later strength, the strength growth rate obviously broadens. The pores characteristic of concrete in different ages and the change of strength of shale ceramsite concrete were studied.