Hydration of mineral shrinkage-compensating admixture for concrete: An experimental and numerical study
Hydration of mineral shrinkage-compensating admixture for concrete: An experimental and numerical study
复制标题
混凝土矿物补偿收缩外加剂的水化：实验和数值研究
DOI：
10.1016/j.conbuildmat.2011.06.070
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发表时间：
2012-01-01
影响因子：
7.4
通讯作者：
Brouwers, H. J. H.
中科院分区：
文献类型：
--
作者：
Chen, W.;Brouwers, H. J. H.
在混凝土中掺加补偿收缩剂是降低混凝土收缩的有效途径。本文采用数值模拟和试验研究相结合的方法，对一种补偿收缩外加剂在水泥净浆和混凝土中的水化过程进行了研究。利用工业副产品研制了一种钙矾石基矿物补偿收缩剂（MSA）。MSA的设计特别考虑了钙矾石形成的化学计量。即它应该提供形成钙矾石所必需的硫酸盐和氧化铝的稳定来源。试验结果表明，新型MSA能有效地补偿混凝土的自收缩。(C)2011爱思唯尔有限公司保留所有权利。
The use of shrinkage-compensating admixture in concrete has been proven to be an effective way to mitigate the shrinkage of concrete. The hydration of a shrinkage-compensating admixture in cement paste and concrete is investigated in this paper with numerical simulation and experimental study. An ettringite-based mineral shrinkage-compensating admixture (MSA) is developed taking use of industrial by-products. The MSA is designed with special considerations to the stoichiometry of ettringite formation. i.e. it should provide stable sources of sulfate and alumina which are necessary for the ettringite formation. Experimental results prove that the new MSA can successfully compensate the autogenous shrinkage of concrete. (C) 2011 Elsevier Ltd. All rights reserved.