粉煤灰对硬化水泥石干缩湿胀行为影响的机理研究  

Study on Mechanism of Influence of Fly Ash on the Dry Shrinkage and Wet Swelling of Hardened Cement

作　　者：张承志[1] 尹利影[1] 王爱勤[2] 

机构地区：[1]河南大学土木建筑学院,河南开封475004 [2]中原工学院建筑工程学院,郑州450007

出　　处：《河南大学学报（自然科学版）》2012年第1期101-105,共5页Journal of Henan University:Natural Science

摘　　要：通过试验研究在不同预养护龄期时,粉煤灰掺量对硬化水泥石干燥收缩过程和吸水膨胀过程的影响.结果表明,粉煤灰掺量不同时对硬化水泥石干燥收缩过程的影响是不一致的,将干燥后的硬化水泥石重新放入水中后,粉煤灰掺量对硬化水泥石的吸水膨胀过程的影响也是不一致的.通过热分析研究不同情况下水的分布,并将此与干缩变形试验的结果相结合,探讨了粉煤灰对硬化水泥石干缩变形的影响机理.The influence of fly ash addition on the dry shrinkage process and the wet swelling process of hardened cement under the different curing age are studied by tests.The result shows that it is inconsistent to the influences of the different content of fly ash on the dry shrinkage process of hardened cement,and to the influences of the content of fly ash on the wet swelling process of the dried hardened cement when it is reputed into water.From thermal analysis of water＇s distribution under different conditions,according to the results of shrinkage deformation,the mechanism of the fly ash on the shrinkage deformation of hardened cement is explored.

关 键 词：粉煤灰 干缩 失水 膨胀 吸水 热分析 

分 类 号：TU528.45[建筑科学—建筑技术科学]