Understanding expansion in calcium sulfoaluminate-belite cements
Understanding expansion in calcium sulfoaluminate-belite cements
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DOI：
10.1016/j.cemconres.2011.07.010
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发表时间：
2012-01-01
影响因子：
11.4
通讯作者：
Juenger, Maria C. G.
中科院分区：
文献类型：
--
作者：
Chen, Irvin A.;Hargis, Craig W.;Juenger, Maria C. G.
硫铝酸钙-贝利特（CSAB）水泥由于其在生产过程中能耗和CO2排放量较低且性能相当，因此被推广为波特兰水泥的可持续替代品。然而，CSAB水泥中的主要水化产物钙矾石的形成可能是膨胀的，有时会导致开裂。控制CSAB水泥膨胀行为的因素尚未完全阐明。在这项研究中，三个CSAB水泥合成的试剂级化学品与不同的相组成进行了检查，在水和硫酸盐溶液中的尺寸稳定性。研究了C（4）A（3）（S）过帽（Ye'elimite）含量、硫酸钙含量、水灰比和颗粒细度对CSAB水泥膨胀的相互影响。结果表明，通过改变CSAB熟料、水泥和浆体中的化学和物理因素，可以控制CSAB的膨胀行为。(C)2011爱思唯尔有限公司版权所有。
Calcium sulfoaluminate-belite (CSAB) cements are promoted as sustainable alternatives to portland cement because of their lower energy and CO(2) emissions during production and comparable performance. However, the formation of ettringite, the main hydration product in CSAB cements, can be expansive, sometimes resulting in cracking. The factors controlling expansive behavior in CSAB cements have not been completely elucidated. In this study, three CSAB cements synthesized from reagent-grade chemicals with varied phase compositions were examined for dimensional stability in water and sulfate solutions. The interdependent effects of C(4)A(3)(S) over cap (Ye'elimite) content, calcium sulfate content, water-to-cement ratio, and particle fineness on CSAB cement expansion were evaluated. The results show that the expansive behavior can be controlled by altering chemical and physical factors in CSAB clinker, cement, and paste. (C) 2011 Elsevier Ltd. All rights reserved.