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| 粉煤灰和矿粉对水泥胶砂自收缩的影响 | |
| 引用本文： | 肖佳,陈雷,邢昊.粉煤灰和矿粉对水泥胶砂自收缩的影响[J].建筑材料学报,2011,14(5). |
| 作者姓名： | 肖佳 陈雷 邢昊 |
| 作者单位： | 1. 中南大学土木工程学院,湖南长沙,410075 2. 中铁大桥局集团桥科院有限公司,湖北武汉,430034 3. 湖南中大设计院有限公司,湖南长沙,410075 |
| 摘 要： | 试验研究了粉煤灰和矿粉对水泥胶砂自收缩的影响.结果表明:当胶砂比(质量比)为1:0.5,水胶比(质量比)为0.3时,随水化龄期延长,水泥胶砂自收缩增大,早期自收缩发展急剧.粉煤灰降低了水泥胶砂的自收缩,随着粉煤灰掺量(质量分数)增大,水泥胶砂自收缩减小;掺10%和20%粉煤灰水泥胶砂的21 d自收缩较纯水泥胶砂分别下降了21.1%和29.5%.水化早期(5d前),矿粉掺量(质量分数)在10%～20%时,随着矿粉掺量增大,水泥胶砂自收缩降低;掺10%和20%矿粉水泥胶砂的21 d自收缩较纯水泥胶砂分别增加了11.1%和6.6%. |
| 关 键 词： | 粉煤灰 矿粉 水泥胶砂 自收缩 |
Influence of Fly Ash and Slag Powder on Autogenous Shrinkage of Cement Mortars |
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| XIAO Jia,CHEN Lei,XING Hao.Influence of Fly Ash and Slag Powder on Autogenous Shrinkage of Cement Mortars[J].Journal of Building Materials,2011,14(5). | |
| Authors: | XIAO Jia CHEN Lei XING Hao |
| Affiliation: | XIAOJia~1,CHEN Lei~2,XING Hao~3 (1.School of Civil Engineering,Central South University,Changsha 410075,China,2.Bridge Science Research Institute Ltd.,China Zhongtie Major Bridge Engineering Group,Wuhan 430034,3 Hunan Zhongda Design Institute Co.,Ltd.,China) |
| Abstract: | The influence of fly ash and slag powder on the autogenous shrinkage of cement mortars was studied.The experiment test results indicate that the autogenous shrinkage of cement mortar made with 1:0.5 binder to sand ratioCby mass) and 0.3 water to binder ratio(by mass) increases with development of hydration.At early age,rate of autogenous shrinkage develops sharply.Addition of fly ash reduces the autogenous shrinkage of cement mortar,and the autogenous shrinkage of cement mortar decreases with increase of fl... |
| Keywords: | fly ash slag powder cement mortar autogenous shrinkage |
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