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Effect of Silicic Acid on Water Resistance of Magnesium Oxysulfate Cement
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Xiaoyang CHEN1, Tingting ZHANG2, Jun CHANG2, Shaoyan WANG1, Hongfa YU3, Wanli BI4
Journal of the Chinese Ceramic Society | 2023, 51(8) : 2017 - 2026
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Journal of the Chinese Ceramic Society | 2023, 51(8): 2017-2026
• Research Articles •
Effect of Silicic Acid on Water Resistance of Magnesium Oxysulfate Cement
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Xiaoyang CHEN1, Tingting ZHANG2, Jun CHANG2, Shaoyan WANG1, Hongfa YU3, Wanli BI4
Affiliations
  • 1.School of Chemical Engineering, University of Science and Technology Liaoning, Anshan 114051, Liaoning, China
  • 2.Faculty of Infrastructure Engineering, Dalian University of Technology, Dalian 116024, Liaoning, China
  • 3.Department of Civil Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, Jiangsu, China
  • 4.School of Materials and Metallurgy, University of Science and Technology Liaoning, Anshan 114051, Liaoning, China

    • CHEN Xiaoyang (1993-), male, Doctoral candidate. E-mail:

About Author:

CHEN Xiaoyang (1993-), male, Doctoral candidate. E-mail:

Published: 2023-04-28 doi: 10.14062/j.issn.0454-5648.20221050
Outline
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Silicic acid was used as a modifier to magnesium oxysulfate (MOS) cement to improve the water resistance of MOS cement. The effect of silicic acid on the mechanical properties, volume stability, and water resistance was investigated. The phase composition, microstructure, and ion leaching concentration were investigated. The co-existence of magnesium silicate hydrate (M-S-H) gel with MOS system was also analyzed. The results show that the addition of silicic acid enhances the mechanical properties and improves the volume stability of MOS cement through promoting the formation of 5Mg(OH)2·MgSO4·7H2O crystals and M-S-H gel. When MOS cement containing silicic acid immerses in water, the residual silicic acid continues to react with free Mg2+ and OH- to form M-S-H gel. Meanwhile, 5Mg(OH)2·MgSO4·7H2O crystals and M-S-H gel coexist in MOS cement, resulting in an improvement in the water resistance of MOS cement.

magnesium oxysulfate cement  /  silicic acid  /  water resistance  /  hydration product  /  microstructure
陈啸洋, 张婷婷, 常钧, 王绍艳, 余红发, 毕万利. 硅酸对硫氧镁水泥耐水性能的影响. 硅酸盐学报, 2023 , 51 (8) : 2017 -2026 . DOI: 10.14062/j.issn.0454-5648.20221050
Xiaoyang CHEN, Tingting ZHANG, Jun CHANG, Shaoyan WANG, Hongfa YU, Wanli BI. Effect of Silicic Acid on Water Resistance of Magnesium Oxysulfate Cement[J]. Journal of the Chinese Ceramic Society, 2023 , 51 (8) : 2017 -2026 . DOI: 10.14062/j.issn.0454-5648.20221050
Appendix
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Year 2023 volume 51 Issue 8
42
6
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Article Info
doi: 10.14062/j.issn.0454-5648.20221050
  • Receive Date：2022-12-05
  • Online Date：2026-10-19
  • Published：2023-04-28
Article Data
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History
  • Received：2022-12-05
  • Revised：2023-01-01
Funding
Affiliations
    1.School of Chemical Engineering, University of Science and Technology Liaoning, Anshan 114051, Liaoning, China
    2.Faculty of Infrastructure Engineering, Dalian University of Technology, Dalian 116024, Liaoning, China
    3.Department of Civil Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, Jiangsu, China
    4.School of Materials and Metallurgy, University of Science and Technology Liaoning, Anshan 114051, Liaoning, China

Corresponding:

ZHANG Tingting (1983-), female, Ph.D., Professor. E-mail:
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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