Effect of sulfur on the ion concentration of pore solution and the hydration of calcium aluminate cement
Effect of sulfur on the ion concentration of pore solution and the hydration of calcium aluminate cement
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DOI：
10.1016/j.cemconcomp.2015.05.004
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发表时间：
2015-09-01
影响因子：
10.5
通讯作者：
Yan, Wen
中科院分区：
文献类型：
--
作者：
Zhang, Yefan;Li, Nan;Yan, Wen
采用XRD、ICP-OES、PH计和SEM等方法研究了两种不同硫含量的低铁铝矾土基铝酸钙水泥（BCACs）的孔溶液离子浓度、pH值和水化过程。结果表明，铝土矿和煤中的硫是BCAC中形成叶蜡石（C（4）A（3）S）的主要原因。BCAC中的硫含量越高，形成的C（4）A（3）S越多。C（4）A（3）S的水化作用降低了Ca、Al离子浓度和pH值，但增加了S离子浓度。BCAC中C（4）A（3）S的水化影响CA的水化和水化。在两种BCAC的水化产物中均发现了CAH（10），而C（2）AH（8）只在SO_3含量较低的BCAC的水化产物中发现。(C)2015爱思唯尔有限公司版权所有。
The ion concentration, PH value of pore solution and the hydration of two low iron calcium aluminate cements based on bauxite (BCACs) with different sulfur content were investigated by XRD, ICP-OES, PH meter and SEM. The results indicate that the sulfur in the bauxite and coal results in the formation of ye'elimite (C(4)A(3)S) in BCAC. The more the sulfur content in BCAC the more the C(4)A(3)S formed. The hydration of C(4)A(3)S decreases the ion concentrations of Ca, Al and the PH values but increases the concentration of S. Hydration and hydrates of CA are influenced by the hydration of C(4)A(3)S in BCAC. CAH(10) is found in the hydration of both BCAC samples, but C(2)AH(8) is only found in the hydrates of the BCAC with lower SO3 content. (C) 2015 Elsevier Ltd. All rights reserved.