摘要
通过测量不同品种和掺量的碱对水泥基材料的水分损失量和自由收缩率,研究了在干燥条件下不同的碱对水泥基材料收缩性能的影响规律。结果表明,在相同水灰比(0.45)和灰砂比(1∶3)条件下,掺入0.214%～1.071%(质量分数,下同)KOH和0.42%NaOH增加了砂浆的水分损失和早期收缩。同时,发现碱作用下水泥基材料的水分损失与收缩过程密切相关,即浆体的收缩随着水分的损失更加明显。
This paper showed the results of experimental study on the effects of different types and adding amount of alkali on the loss rate of water and the drying shrinkage of cement paste. The test results demonstrated that with the same water to binder ratio (0.45) and cement to sand ratio (1∶3), the incorporation of 0.214%～1.071% KOH and 0.42% NaOH leaded to an increase in loss of weight and free shrinkage of cement mortar. Moreover, the relation between the loss rate of water and the drying shrinkage of binder paste is tight and namely free shrinkage was increased with the increase of loss rate of weight.
出处
《武汉理工大学学报》
CAS
CSCD
北大核心
2005年第1期33-35,共3页
Journal of Wuhan University of Technology
基金
国家"863"计划(2002AA335050)
国家"973"计划(2001CB6107043).
关键词
碱
水泥基材料
水分损失
收缩
alkali
cement-based materials
loss of weight
drying shrinkage
