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Volume 32, Issue 8
August 2020
Advances in Cement Research Cover Image for Volume 32, Issue 8
Research Article| April 18 2019

Investigation on the properties of magnesium oxychloride cement prepared with seawater

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Qing Huang
Doctoral student, Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining, P.R. China
Key Laboratory of Salt Lake Resources Chemistry of Qinghai Province, Xining, P.R. China
University of Chinese Academy of Sciences, Beijing, P.R. China
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Ying Li
Associate Professor, Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining, P.R. China
Key Laboratory of Salt Lake Resources Chemistry of Qinghai Province, Xining, P.R. China
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Weixin Zheng
Doctoral student, Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining, P.R. China
Key Laboratory of Salt Lake Resources Chemistry of Qinghai Province, Xining, P.R. China
The Graduate University of Academy of Science, Beijing, P.R. China
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Jing Wen
Associate Professor, Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining, P.R. China
Key Laboratory of Salt Lake Resources Chemistry of Qinghai Province, Xining, P.R. China
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Chenggong Chang
Research Associate, Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining, P.R. China
Key Laboratory of Salt Lake Resources Chemistry of Qinghai Province, Xining, P.R. China
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Jinmei Dong
Associate Professor, Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining, P.R. China
Key Laboratory of Salt Lake Resources Chemistry of Qinghai Province, Xining, P.R. China
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Yangyang Man
Graduate student, Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining, P.R. China
Key Laboratory of Salt Lake Resources Chemistry of Qinghai Province, Xining, P.R. China
The Graduate University of Academy of Science, Beijing, P.R. China
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Dunchun A
Graduate student, Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining, P.R. China
Key Laboratory of Salt Lake Resources Chemistry of Qinghai Province, Xining, P.R. China
The Graduate University of Academy of Science, Beijing, P.R. China
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ORCID logo 0000-0001-5634-0985
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Xueying Xiao
Researcher, Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining, P.R. China
Key Laboratory of Salt Lake Resources Chemistry of Qinghai Province, Xinning, Xining, P.R. China (corresponding author: xiaoxy@isl.an.cn)
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Yuan Zhou
Researcher, Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining, P.R. China
Key Laboratory of Salt Lake Resources Chemistry of Qinghai Province, Xinning, Xining, P.R. China
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Author & Article Information
Publisher: Emerald Publishing
Received: August 26 2018
Revision Received: March 05 2019
Accepted: March 17 2019
Online ISSN: 1751-7605
Print ISSN: 0951-7197
ICE Publishing: All rights reserved
2019
Advances in Cement Research (2020) 32 (8): 379–388.
https://doi.org/10.1680/jadcr.18.00159
Article history
Received:
August 26 2018
Revision Received:
March 05 2019
Accepted:
March 17 2019

Seawater from South China Sea was used instead of freshwater to fabricate magnesium oxychloride cement (MOC). To study the basic performance of the seawater-mixed MOC paste, the setting time, hydration exothermic characteristics, compressive strength, thermal stability, seawater resistance, phase composition and microstructure of the paste were analysed in detail. The results showed that the use of seawater in the MOC paste slightly retarded the setting time and increased the total hydration heat. The compressive strength and thermal stability of the seawater-mixed MOC were slightly lower than those of the MOC paste prepared with freshwater. The main hydration product of both MOC pastes was 5Mg(OH)2.MgCl2.8H2O. The residual strength ratio of the seawater MOC paste was 9·70% higher than that of the freshwater MOC paste after 28 d immersion in seawater. However, the standard deviations suggest that the properties of MOC pastes prepared with seawater or freshwater were not significantly different.

Keywords: compressive strength, microstructure, special cements
ICE Publishing: All rights reserved
2019
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