铝酸三钙和碳酸钙对硅酸盐水泥早期力学强度及凝结时间的协同作用研究

硅酸盐通报 ›› 2021, Vol. 40 ›› Issue (5): 1470-1476.

所属专题：水泥混凝土

铝酸三钙和碳酸钙对硅酸盐水泥早期力学强度及凝结时间的协同作用研究

严子伟¹, 刘黎², 孙晋峰², 卢豹², 祖庆贺³, 臧军³, 李德标⁴, 侯贵华²

1.江苏大学材料科学与工程学院,镇江 212013;
2.盐城工学院,江苏省新型环保重点实验室,盐城 224051;
3.徐州中联混凝土有限公司,徐州 221100;
4.盐城市荣立新型建材有限公司,盐城 224051

收稿日期:2021-01-13 修回日期:2021-02-19 出版日期:2021-05-15 发布日期:2021-06-07
通讯作者: 侯贵华,博士,教授。E-mail:2337486218@qq.com
作者简介:严子伟(1996—),男,硕士研究生。主要从事硅酸盐矿物的碳酸化研究。E-mail:840590795@qq.com
基金资助:
江苏省科技计划(BZ2020012)

Synergistic Effect of Tricalcium Aluminate and Calcium Carbonate on Early Mechanical Strength and Setting Time of Portland Cement

YAN Ziwei¹, LIU Li², SUN Jinfeng², LU Bao², ZU Qinghe³, ZANG Jun³, LI Debiao⁴, HOU Guihua²

1. College of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China;
2. Key Laboratory for Advanced Technology in Environmental Protection of Jiangsu Province, Yancheng Institute of Technology, Yancheng 224051, China;
3. China United Concrete Xuzhou Co., Ltd., Xuzhou 221100, China;
4. Yancheng Rongli New Building Materials Co., Ltd., Yancheng 224051, China

Received:2021-01-13 Revised:2021-02-19 Online:2021-05-15 Published:2021-06-07

摘要/Abstract

摘要： 本文研究了协同掺加铝酸三钙(C₃A)和碳酸钙(CaCO₃)对硅酸盐水泥早期水化及硬化性能的影响。用X射线衍射(XRD)、热重分析(TG)、扫描电子显微镜(SEM)等技术分析水化产物及显微结构。结果表明,协同掺加C₃A和CaCO₃会显著提高硅酸盐水泥的早期力学强度。当硅酸盐水泥中掺加15%(质量分数,下同)的C₃A,并对应掺加5.6%的CaCO₃时,其3 d、7 d、14 d抗压强度较参比样分别提高了28.8%、55.7%、26.8%。微观分析指出,协同掺加C₃A和CaCO₃,促进了水泥水化早期碳铝酸钙的生成,是提高水泥砂浆早期强度的主要原因。

关键词: 凝结时间, 力学性能, 铝酸三钙, 碳酸钙, 协同作用, 碳铝酸钙

Abstract: In this paper, the synergistic effect of tricalcium aluminate (C₃A) and calcium carbonate (CaCO₃) on the early hydration and hardening properties of Portland cement was studied. Then a series of methods including X-ray diffraction (XRD), thermogravimetric analysis (TG) and scanning electron microscopy (SEM) were adopted to analyze the hydrates and microstructures. Results indicate that the simultaneous addition of C₃A and CaCO₃ effectively boosts the mechanical strength of the Portland cement mortar and the content of C₃A and CaCO₃ are 15% (mass fraction, the same below) and 5.6% respectively presented the best mechanical performance. Compared to the reference mortar, this combination increases the compressive strength by 28.8%, 55.7%, 26.8% at 3 d, 7 d and 14 d, respectively. It is inferred that the simultaneous addition of C₃A and CaCO₃ stimulates the formation of calcium carboaluminate, which benefits the early mechanical strength development.

Key words: setting time, mechanical property, tricalcium aluminate, calcium carbonate, synergistic effect, calcium carboaluminate

中图分类号:

TU528

严子伟, 刘黎, 孙晋峰, 卢豹, 祖庆贺, 臧军, 李德标, 侯贵华. 铝酸三钙和碳酸钙对硅酸盐水泥早期力学强度及凝结时间的协同作用研究[J]. 硅酸盐通报, 2021, 40(5): 1470-1476.

YAN Ziwei, LIU Li, SUN Jinfeng, LU Bao, ZU Qinghe, ZANG Jun, LI Debiao, HOU Guihua. Synergistic Effect of Tricalcium Aluminate and Calcium Carbonate on Early Mechanical Strength and Setting Time of Portland Cement[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(5): 1470-1476.

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铝酸三钙和碳酸钙对硅酸盐水泥早期力学强度及凝结时间的协同作用研究

Synergistic Effect of Tricalcium Aluminate and Calcium Carbonate on Early Mechanical Strength and Setting Time of Portland Cement

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