In-situ X-ray Diffraction Analysis on the Role of Hardening Accelerator in Early Hydration of Cement

被引：0
|
作者：
Yu X. [1 ]
Yu C. [1 ]
Jiang Q. [1 ]
Ran Q. [1 ]
Liu J. [2 ]
Yang B. [3 ]
机构：
[1] State Key Laboratory of High Performance Civil Engineering Materials, Jiangsu Sobute New Materials Co. Ltd., Nanjing
[2] School of Materials Science and Engineering, Southeast University, Nanjing
[3] China State Railway Group Co., Ltd., Beijing
来源：
Cailiao Daobao/Materials Reports | 2020年 / 34卷 / 01期
基金：
国家重点研发计划;
关键词：
Cement hydration; Hardening accelerator; In-situ XRD;
D O I：
10.11896/cldb.19010051
中图分类号：
学科分类号：
摘要：
This study investigated the effect of inorganic salt hardening accelerator (including sodium thiocyanate, sodium sulfate and sodium thiosulfate) on early age hydration of cement by means of in-situ XRD analysis and isothermal calorimetry. Analysis on the quantitative results of hydration samples in each group was also carried out. Results revealed that the three hardening accelerators with a proper dosage range were able to promote the hydration of C3S, C3A and C4AF and accelerate the hydration heat evolution in different degrees. Consequently, the degree of early age hydration of cement was improved. The conclusion drawn from quantitative results of in-situ hydration samples was in consistent with the variation law of isothermal calorimetry curve, indicating the effectiveness and reliability of in-situ XRD in investigating the early age hydration of cement. © 2020, Materials Review Magazine. All right reserved.
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页码：02058 / 02062
页数：4
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