The relationship between autogenous shrinkage and pore structure of cement paste with mineral admixtures
The relationship between autogenous shrinkage and pore structure of cement paste with mineral admixtures
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DOI：
10.1016/j.conbuildmat.2010.04.018
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发表时间：
2010-10-01
影响因子：
7.4
通讯作者：
Guo, Yilin
中科院分区：
文献类型：
--
作者：
Li, Yue;Bao, Junling;Guo, Yilin
本文采用粉煤灰与硅灰、粉煤灰与矿渣的复合矿物掺合料作为水泥浆体的复合矿物掺合料。测试了掺矿物掺合料水泥石的自收缩和孔结构，并探讨了自收缩与孔结构的关系。结果表明：粉煤灰能减小混凝土的自收缩，硅灰能增大混凝土的自收缩，而高炉渣的作用介于两者之间;虽然硅灰和高炉矿渣都能削弱水泥石的孔隙率和平均孔径，增加直径在5 ~ 50 nm之间的孔的体积百分比和孔比表面积，硅灰在改变孔结构方面优于高炉渣。自收缩率与孔径在5 ~ 50 nm之间的孔隙体积百分比呈明显的正相关关系。皇冠版权所有（C）2010由爱思唯尔有限公司出版。保留所有权利。
In this paper, the combination of fly ash and silica fume, or fly ash and blast furnace slag were used as the composite mineral admixtures in cement paste. The autogenous shrinkage and the pore structure of the hardened cement paste with mineral admixtures were tested, and the relationship of the autogenous shrinkage and pore structure also was discussed. The results indicate that fly ash can reduce the autogenous shrinkage, and silica fume can increase the autogenous shrinkage, and the effect of blast furnace slag is between the two above; although both silica fume and blast furnace slag can weaken the porosity and the mean diameter of cement paste, and increase the volumetric percentage of pores whose diameter is between 5 and 50 nm and pore specific surface, silica fume is better than blast furnace slag in changing the pore structure. The relationship between the autogenous shrinkage and volumetric percentage of pores whose diameter is between 5 and 50 nm is obviously proportional. Crown Copyright (C) 2010 Published by Elsevier Ltd. All rights reserved.