화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.83, 387-400, March, 2020
DOI10.1016/j.jiec.2019.12.012  Export Citation
In situ monitoring of pore structure of magnesium oxysulfate cement paste: Effect of MgSO4/H2O ratio
Shengwen Tang1, 2, †, Changrong Wei1, Rongjin Cai1, Jiasheng Huang3, E. Chen4, †, and Junhui Yuan1
  • 1State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan, China
  • 2State Key Laboratory of Green Building in Western China, Xian University of Architecture & Technology, China
  • 3City University of Hong Kong Shenzhen Research Institute, Shenzhen, China
  • 4Department of Civil and Environment Engineering, The Hong Kong University of Science and Technology, Kowloon, Clear Water Bay, Hong Kong
E-mail:,
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.
Keywords:Magnesium oxysulfate cement;Pore structure;Mercury intrusion porosimetry;Electrical impedance;Fractal
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