The application of thermal analysis, XRD and SEM to study the hydration behavior of tricalcium silicate in the presence of a polycarboxylate superplasticizer

被引：55
作者：
Liu, Ming [1 ]
Lei, Jiaheng [2 ]
Guo, Liping [2 ]
Du, Xiaodi [2 ]
Li, Junsheng [2 ]
机构：
[1] Wuhan Univ Technol, Sch Mat Sci & Engn, Wuhan 430070, Peoples R China
[2] Wuhan Univ Technol, Sch Chem Chem Engn & Life Sci, Wuhan 430070, Peoples R China
来源：
THERMOCHIMICA ACTA | 2015年 / 613卷
关键词：
Tricalcium silicate; Cement; Hydration; Thermal analysis; Polycarboxylate superplasticizer; COMB-SHAPED SUPERPLASTICIZERS; PORTLAND-CEMENT; CLINKER SURFACES; CALCIUM-SILICATE; HEAT EVOLUTION; IMPACT; ADSORPTION; NUCLEATION; ADMIXTURES; ADDITIVES;
D O I：
10.1016/j.tca.2015.05.020
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
Hydration behavior of tricalcium silicate (C3S) in the presence of a polycarboxylate (PC) superplasticizer was investigated by means of isothermal calorimetry, differential thermal analysis and X-ray diffraction. In addition, the adsorption characteristics of PC and morphology change of Ca(OH)(2) crystals were also examined, respectively. The results showed that initial hydration process of C3S was markedly retarded by PC and the retardation effect depended on the dosage of PC. The decomposition temperature of the Ca (OH)(2) was slightly lower after PC modification. Moreover, the size of Ca(OH)(2) crystals were found to be changed due to the adsorption of PC. The results obtained in this research allowed us to gain insights into the interactions between PC and cement. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码：54 / 60
页数：7
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