预湿程度对页岩陶粒混凝土显微结构及强度的影响

研究了页岩陶粒经不同程度预湿处理后混凝土强度变化规律,并利用扫描电镜对页岩陶粒混凝土集料与水泥石界面区及水泥石基体的显微结构进行了研究.研究结果表明:随着页岩陶粒预湿程度的增加,混凝土早期强度降低幅度较后期强度大,而强度增长率明显增大.探讨了不同龄期混凝土显微结构的孔隙特征,从微观结构揭示混凝土强度变化规律.

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 interracial 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.