水泥基材料干燥收缩快速测定方法研究.pdf

粉煤灰综合利用 FLY ASH COMPREHENSIVE UTILIZATION 2013N0.3 专题研究 水泥基材料干燥收缩快速测定方法研究 Study on a Rapid Test Method for Drying Shrinkage of Cement Matrix 朱蓓蓉1.2，曹秋凤1，马一平1.2 (1.同济大学材料科学与工程学院，上海201804； 2.同济大学先进土木工程材料教育部重点实验室，上海201804) 摘要：提出了一种水泥胶砂干燥收缩快速测定方法，并与现行标准JC/T603一2004建立起关系.结果表明：高温 低湿条件下水泥胶砂干燥收缩达到稳定所需的时间可大大缩短，由常温条件下：(22士2)℃，50%~55%RH 4个月左右 缩短到了60℃烘箱条件下3周左右，80℃烘箱条件下2周左右；高温低湿条件下水泥胶砂干燥收缩明显降低，通过高温 低湿快速测定方法，利用温湿度修正系数(60℃烘箱条件下约为1.60 80℃烘箱条件下约为2.15)可预测常温条件下水 泥胶砂最终干燥收缩值. 关键词：水泥胶砂；干燥收缩；快速测定方法 中图分类号：TU502.3 文献标识码：A 文章编号：1005-8249(2013)03-0003-04 Zhu Bei-rong2 Cao Qiu-feng Ma Yi-ping' (1.School of Materials Science and Engineering Tongji University Shanghai 201804.China; 2.Key Laboratory of Advanced Civil Engineering Materials of ministry of Education Tongji University Shanghai 201804 China) Abstract:A rapid test method for drying shrinkage of cement mortar was put forw ard and pared with JC/T 603-2004 standard test method.Results show that the time for the value of drying shrinkage of cement mortar achieving stability in environment of high tem- perature and low humidity shortens greatly from about four months at±2℃in5o%~55/RH environment to about three weeks at6o℃ in<l0%RH environment and even about two weeks at8o℃in<lo%RH environment.The value of drying shrinkage of cement mortar also decreases greatly in environment of high temperature and low humidity The ultimate value of drying shrinkage of cement mortar at 22±2℃in50%~55%RH environment can be forecast with the rapid test method ...