Investigation on the properties of magnesium oxychloride cement prepared with seawater
| Autor: | Yangyang Man, Jinmei Dong, Jing Wen, Xueying Xiao, Ying Li, Chenggong Chang, Yuan Zhou, Zheng Weixin, Dunchun A, Qing Huang |
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| Rok vydání: | 2020 |
| Předmět: |
Cement
South china Materials science Magnesium Metallurgy 0211 other engineering and technologies chemistry.chemical_element 02 engineering and technology Building and Construction Microstructure 01 natural sciences 010406 physical chemistry 0104 chemical sciences Compressive strength chemistry 021105 building & construction Setting time General Materials Science Seawater |
| Zdroj: | Advances in Cement Research. 32:379-388 |
| ISSN: | 1751-7605 0951-7197 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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