Al2O3掺杂对γ-C2S碳化性能的影响

硅酸盐通报 ›› 2021, Vol. 40 ›› Issue (6): 2003-2010.

Al₂O₃掺杂对γ-C₂S碳化性能的影响

明心昭, 刘志超, 王发洲, 胡曙光, 胡传林

武汉理工大学,硅酸盐建筑材料国家重点实验室,武汉 430070

收稿日期:2021-01-19 修回日期:2021-03-03 出版日期:2021-06-15 发布日期:2021-07-08
通讯作者: 刘志超,博士,教授。E-mail:liuzc9@whut.edu.cn
作者简介:明心昭(1994—),男,硕士研究生。主要从事γ-C₂S碳化性能影响的研究。E-mail:352456964@qq.com
基金资助:
国际科技合作重点项目计划(2018YFE0106300);国家自然科学基金(51925205,U2001227,51872216)

Effect of Al₂O₃ Doping on Carbonation Performance of γ-C₂S

MING Xinzhao, LIU Zhichao, WANG Fazhou, HU Shuguang, HU Chuanlin

State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China

Received:2021-01-19 Revised:2021-03-03 Online:2021-06-15 Published:2021-07-08

摘要/Abstract

摘要： 本文研究了Al₂O₃掺杂对γ-C₂S熟料粒径、微观结构和力学性能的影响。试验结果表明:Al₂O₃掺杂不会改变γ-C₂S的晶型,但显著改变了其形貌;纯相γ-C₂S颗粒表面褶皱较多,颗粒尺寸较大,掺杂Al₂O₃后γ-C₂S颗粒表面褶皱消失而变得光滑;γ-C₂S碳化体的抗压强度与碳化程度随着Al₂O₃掺量的提高逐渐增加。通过碳化反应温升并结合碳酸钙衍射峰的半峰宽和X射线衍射仪(XRD)定量分析表明,Al₂O₃掺杂延缓了碳化放热,有利于碳化反应的持久进行,同时促进了碳酸钙晶粒的生长和数量的增加,从而使碳化程度更高,基体结构更加密实,因而抗压强度更高。

关键词: Al₂O₃, γ-C₂S, 碳化, 碳酸钙, 力学性能, 半峰宽

Abstract: The effect of Al₂O₃ doping on the particle size, microstructure and mechanical properties of calcined γ-C₂S clinker was investigated. Results indicate that Al₂O₃ doping has no influence on the crystal form of γ-C₂S, but significantly changes its morphology. The undoped γ-C₂S grains exhibit wrinkly surface morphology and the particle size is larger. After Al₂O₃ doping, the grain surface becomes smooth. The compressive strength and the degree of carbonation of γ-C₂S carbonated for 24 h gradually increase with the increasing content of Al₂O₃. Based on the carbonation temperature rise, full width at half maximum of the diffraction peaks of calcium carbonate and the quantitative XRD analysis, Al₂O₃ doping retards the heat release of carbonation, which is beneficial for a more sustained carbonation reaction. Al₂O₃ doping also promotes the growth and the number of calcium carbonate crystals, which increases the degree of carbonation, densifies the carbonated matrix and increases the compressive strength.

Key words: aluminate oxide, γ-C₂S, carbonation, calcium carbonate, mechanical property, full width at half maximum

中图分类号:

TQ172.1

明心昭, 刘志超, 王发洲, 胡曙光, 胡传林. Al₂O₃掺杂对γ-C₂S碳化性能的影响[J]. 硅酸盐通报, 2021, 40(6): 2003-2010.

MING Xinzhao, LIU Zhichao, WANG Fazhou, HU Shuguang, HU Chuanlin. Effect of Al₂O₃ Doping on Carbonation Performance of γ-C₂S[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(6): 2003-2010.

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Al₂O₃掺杂对γ-C₂S碳化性能的影响

Effect of Al₂O₃ Doping on Carbonation Performance of γ-C₂S

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