Effect of brick powder on the pore solution and microstructure of Portland cement

被引：21
作者：
Luo, Xu [1 ,2 ]
Shujun, Li [1 ,2 ]
Guo, Zhaoheng [1 ,2 ]
Chen, Gaofeng [1 ,2 ]
Gao, Jianming [1 ,2 ]
机构：
[1] Southeast Univ, Sch Mat Sci & Engn, Nanjing 211189, Peoples R China
[2] Jiangsu Key Lab Construct Mat, Nanjing 211189, Peoples R China
来源：
JOURNAL OF BUILDING ENGINEERING | 2023年 / 63卷
基金：
中国国家自然科学基金;
关键词：
Brick powder; Ion concentration; pH value; Electrical conductivity; Pore structure; CLAY BRICK; HYDRATION; WASTE; MECHANISMS; CONCRETE; ALKALI; PH; CARBONATION; STRENGTH; INDUSTRY;
D O I：
10.1016/j.jobe.2022.105497
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
In order to investigate the effect of brick powder on the pore solution and microstructure of Port-land cement, the pH value, ion concentration and electrical conductivity of the pore solution were explored, and the pore structure and morphology of cementitious materials was explored by Mercury intrusion porosimetry (MIP) and scanning electron microscope (SEM) in this study. The results indicated that the addition of brick powder decreases the pH value of the pore solution and also has an impact on the ion concentration of the pore solution. The pozzolanic reaction at the late hydration stage consumes Ca2+ and decreases the pH value. And the pozzolanic reaction products fill pore and refine the pore size, in addition, brick powder also has filler effect and dilu-tion effect. The addition of brick powder reduces the aspect ratio of ettringite.
引用
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页数：12
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