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

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal

2 Scopus Citations
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  • Shengwen Tang
  • Changrong Wei
  • Rongjin Cai
  • E. Chen
  • Junhui Yuan

Related Research Unit(s)


Original languageEnglish
Pages (from-to)387-400
Journal / PublicationJournal of Industrial and Engineering Chemistry
Online published14 Dec 2019
Publication statusPublished - 25 Mar 2020


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.

Research Area(s)

  • Electrical impedance, Fractal, Magnesium oxysulfate cement, Mercury intrusion porosimetry, Pore structure

Citation Format(s)