氧化镁质和硫铝酸钙膨胀剂对工程水泥基复合材料性能的影响

硅酸盐通报 ›› 2022, Vol. 41 ›› Issue (1): 33-40.

所属专题：水泥混凝土

氧化镁质和硫铝酸钙膨胀剂对工程水泥基复合材料性能的影响

周建伟, 余保英, 孔亚宁, 杨文, 李毅, 亢泽千

中建西部建设建材科学研究院,成都 610094

收稿日期:2021-07-25 修订日期:2021-10-27 出版日期:2022-01-15 发布日期:2022-02-10
通信作者: 余保英,博士,工程师。E-mail:yby2872@163.com
作者简介:周建伟(1993—),男。主要从事先进水泥基材料研发工作。E-mail:20120949@cqu.edu.cn
基金资助:
国家重点研发计划“固废资源化”重点专项(2019YFC1907200);中国住房与城乡建设部研究开发项目(2019-K-049);中建股份科技研发计划(CSCEC-2019-Z-24);中建西部建设科技研发计划(ZJXJ-2019-15)

Effects of Magnesia and Calcium Sulfoaluminate Expansive Agents on Properties of Engineered Cementitious Composites

ZHOU Jianwei, YU Baoying, KONG Yaning, YANG Wen, LI Yi, KANG Zeqian

China West Construction Academy of Building Materials, Chengdu 610094, China

Received:2021-07-25 Revised:2021-10-27 Online:2022-01-15 Published:2022-02-10

摘要/Abstract

摘要： 本文研究了氧化镁质和硫铝酸钙膨胀剂对工程水泥基复合材料水化产物及微观结构的影响。结果表明:两种膨胀剂均会引起工程水泥基复合材料流动性能、力学性能的下降;掺入氧化镁质膨胀剂使得材料体系中大量生成富镁硅钙石,而掺入硫铝酸钙膨胀剂使得材料体系中钙矾石含量增大,两种水化产物均可以细化材料的孔结构,改善试样的抗氯离子渗透性能,5%(质量分数)掺量下硫铝酸钙膨胀剂试样的孔径比氧化镁质膨胀剂试样的更小,结构更加稳定。

关键词: 氧化镁, 硫铝酸钙, 膨胀剂, 工程水泥基复合材料, 水化产物, 微观结构

Abstract: The effects of magnesia and calcium sulphoaluminate expansive agent on hydration products and microstructure of engineered cementitious composites were studied. The results show that the two expansive agents decrease the fluidity and mechanical properties.The addition of magnesia expansion agent makes a large amount of magnesium-rich calcium-silicate in the material system, while the addition of calcium sulfoaluminate expansion agent increases the content of ettringite in the material system. The two hydration products refine the pore structure of the material and improve the impermeability of the samples. The pore diameter of the sample dope with 5% (mass fraction) calcium sulfoaluminate expansion agent is smaller than that with magnesia expansive agent, and the structure of sample with calcium sulfoaluminate expansion agent is more stable.

Key words: magnesia, calcium sulfoaluminate, expansive agent, engineered cementitious composite, hydration product, microstructure

中图分类号:

TU528

周建伟, 余保英, 孔亚宁, 杨文, 李毅, 亢泽千. 氧化镁质和硫铝酸钙膨胀剂对工程水泥基复合材料性能的影响[J]. 硅酸盐通报, 2022, 41(1): 33-40.

ZHOU Jianwei, YU Baoying, KONG Yaning, YANG Wen, LI Yi, KANG Zeqian. Effects of Magnesia and Calcium Sulfoaluminate Expansive Agents on Properties of Engineered Cementitious Composites[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2022, 41(1): 33-40.

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氧化镁质和硫铝酸钙膨胀剂对工程水泥基复合材料性能的影响

Effects of Magnesia and Calcium Sulfoaluminate Expansive Agents on Properties of Engineered Cementitious Composites

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