In situ monitoring of pore structure of magnesium oxysulfate cement paste: Effect of MgSO4/H2O ratio

被引：33
|
作者：
Tang, Shengwen [1 ,2 ,3 ]
Wei, Changrong [1 ]
Cai, Rongjin [1 ]
Huang, Jiasheng [4 ]
Chen, E. [5 ]
Yuan, Junhui [1 ]
机构：
[1] Wuhan Univ, State Key Lab Water Resources & Hydropower Engn S, Wuhan, Peoples R China
[2] Xian Univ Architecture & Technol, State Key Lab Green Bldg Western China, Xian, Peoples R China
[3] Wuhan Univ, Suzhou Inst, Suzhou, Peoples R China
[4] City Univ Hong Kong, Shenzhen Res Inst, Shenzhen, Peoples R China
[5] Hong Kong Univ Sci & Technol, Dept Civil & Environm Engn, Kowloon, Clear Water Bay, Hong Kong, Peoples R China
来源：
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY | 2020年 / 83卷
基金：
中国国家自然科学基金;
关键词：
Magnesium oxysulfate cement; Pore structure; Mercury intrusion porosimetry; Electrical impedance; Fractal; CALCIUM SULFOALUMINATE CEMENT; BY-PRODUCTS; PERMEABILITY; PERFORMANCE; HYDRATION; PHASE; ACID; ASH;
D O I：
10.1016/j.jiec.2019.12.012
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
This work systematically presented the pore structure evolution of different magnesium oxysulfate (MOS) cement pastes by non-contact impedance measurement (NCIM), fractal theory and other microstructural experiments. According to the evolution of electrical impedance response, three hydration stages (dissolution, acceleration and hardened stages) can be identified in the pastes. Furthermore, based on the results obtained from NCIM and fractal theory, the porosity, incremental pore volume, pore tortuosity, average pore diameter and maximal pore diameter of MOS cement pastes are investigated. The influence of MgSO4/H2O ratio on pore structure of MOS cement paste is primarily explained. It can be inferred from predicted and experimental results that NCIM is a good method to analyze the microstructure evolution of MOS cement pastes in-situ. (C) 2019 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
引用
收藏
页码：387 / 400
页数：14
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