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

被引：42
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
相关论文
共 32 条
  • [1] Carbonation of magnesium oxysulfate cement and its influence on mechanical performance
    Ba, Mingfang
    Xue, Tao
    He, Zhimin
    Wang, Hui
    Liu, Junzhe
    [J]. CONSTRUCTION AND BUILDING MATERIALS, 2019, 223 : 1030 - 1037
  • [2] Chemical phases and microstructural analysis of pastes based on magnesia cement
    Gomes, Carlos Marmorato
    de Oliveira, Adla Dionisio S.
    [J]. CONSTRUCTION AND BUILDING MATERIALS, 2018, 188 : 615 - 620
  • [3] Improving strength, drying shrinkage, and pore structure of concrete using metakaolin
    Gueneyisi, Erhan
    Gesoglu, Mehmet
    Mermerdas, Kasim
    [J]. MATERIALS AND STRUCTURES, 2008, 41 (05) : 937 - 949
  • [4] The mechanical properties of magnesium oxysulfate cement enhanced with 517 phase magnesium oxysulfate whiskers
    Guo, Tao
    Wang, Hefang
    Yang, Hongjian
    Cai, Xiaosen
    Ma, Qiu
    Yang, Shaoming
    [J]. CONSTRUCTION AND BUILDING MATERIALS, 2017, 150 : 844 - 850
  • [5] Determining porosity and pore network connectivity of cement-based materials by a modified non-contact electrical resistivity measurement: Experiment and theory
    He, Rui
    Ma, Hongyan
    Hafiz, Rezwana B.
    Fu, Chuanqing
    Jin, Xianyu
    He, Jiahao
    [J]. MATERIALS & DESIGN, 2018, 156 : 82 - 92
  • [6] The investigation of early hydration and pore structure for limestone powder wastes blended cement pastes
    He, Zhen
    Cai, Rongjin
    Chen, E.
    Tang, Shengwen
    [J]. CONSTRUCTION AND BUILDING MATERIALS, 2019, 229
  • [7] Influence of Fly Ash and Silica Fume on Water-resistant Property of Magnesium Oxychloride Cement
    Li Chengdong
    Yu Hongfa
    [J]. JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION, 2010, 25 (04): : 721 - 724
  • [8] Effect of pulverized fuel ash, ground granulated blast-furnace slag and CO2 curing on performance of magnesium oxysulfate cement
    Li, Qiyan
    Zhang, Linchun
    Gao, Xiaojian
    Zhang, Junyi
    [J]. CONSTRUCTION AND BUILDING MATERIALS, 2020, 230 (230)
  • [9] A fractal analysis of permeability for fractured rocks
    Miao, Tongjun
    Yu, Boming
    Duan, Yonggang
    Fang, Quantang
    [J]. INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 2015, 81 : 75 - 80
  • [10] Modification of Magnesium Oxysulfate Cement by Incorporating Weak Acids
    Qin, Ling
    Gao, Xiaojian
    Li, Wengui
    Ye, Huan
    [J]. JOURNAL OF MATERIALS IN CIVIL ENGINEERING, 2018, 30 (09)
1234