Preparation of Magnesium Oxysulfide Cement by Highly Active Magnesium Oxide Regulated by Phosphate
JI Renlin1,2,3, JIA Songyan1,2,3,*, TANG Jia’ao1,2,3, MA Yali1,2,3, ZHENG Qiang1,2,3, LI Xue1,2,3,*
1 College of Chemical Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China 2 Liaoning Engineering Research Center for Magnesium and Calcium Inorganic Functional Materials, Shenyang 110142, China 3 Shenyang Key Laboratory for the Utilization Technology of Magnesium and Calcium Resources, Shenyang 110142, China
Abstract: The preparation of magnesium oxide (MgO) by calcining magnesite with new technologies such as flash roasting represents to be an energy saving upgrade for the conventional technologies. However, the product is not suitable for preparing magnesium oxysulfide cement (MOSC) due to its high activity and quick hydration rate. Phosphates were used as the modifiers in this work. The effect of phosphates on the hydration process of highly active MgO as well as the effect on setting time, fluidity and compressive strength of MOSC prepared by highly active MgO was investigated. The mechanisms on improving the performance of MOSC with modifiers were discussed. The results demonstrated that sodium dihydrogen phosphate (NaH2PO4) can effectively inhibit the hydration process of highly active MgO. When MOSC was prepared by MgO with an activity of 81%, the optimal performance was achieved by adding NaH2PO4 with a loading of 2%. The 7 d and 28 d compressive strength of MOSC were 43.8 MPa and 50.2 MPa, respectively, with the improvement up by 86.4% and 73.7% compared with the additive-free results. Adding NaH2PO4 can effectively delay the early exothermic hydration reaction, inhibit the formation of Mg(OH)2, promote the growth of 5·1·7 phase, and therefore improve the compressive strength of MOSC.
1 Zeng T, Chen X Y, Wang N, et al. Materials Reports, 2024, 38(17), 62(in Chinese). 曾田, 陈啸洋, 王南, 等. 材料导报, 2024, 38(17), 62. 2 Wang A G, Chu Y J, Xu H Y, et al. Materials Reports, 2020, 34(13), 13091(in Chinese). 王爱国, 楚英杰, 徐海燕, 等. 材料导报, 2020, 34(13), 13091. 3 Gu K, Chen B, Jiang Z W. Construction and Building Materials, 2023, 405, 133341. 4 Li B, Chen B. Construction and Building Materials, 2024, 429, 136359. 5 Liang H H, Li Y, Yang H J, et al. Bulletin of the Chinese Ceramic Society, 2022, 41(12), 4139(in Chinese). 梁慧慧, 李阳, 杨红健, 等. 硅酸盐通报, 2022, 41(12), 4139. 6 Li Q Y, Su A S, Gao X J. Science of the Total Environment, 2021, 809, 152127. 7 Wu C Y, Chen W H, Zhang H F, et al. Construction and Building Materials, 2017, 144, 516. 8 Song J J, Chen R Y, Fu J F, et al. Construction and Building Materials, 2024, 413, 134896. 9 Wang N, Yu H F, Bi W L, et al. Construction and Building Materials, 2018, 169, 697. 10 Cai J Q, Zhu L G, Zhang B J. Journal of Building Engineering, 2024, 86, 108693. 11 Gomes C M, Oliveira A K D S. Construction and Building Materials, 2020, 262, 119913. 12 Zhang N, Yu H F, Gong W, et al. Construction and Building Materials, 2020, 230, 116951. 13 Ba M F, Ma Z Y, Ji L X, et al. Journal of Building Materials, 2024, 27(8), 733(in Chinese). 巴明芳, 马哲洋, 纪璐鑫, 等. 建筑材料学报, 2024, 27(8), 733. 14 Sun C, Yan B W, Cai C Y, et al. CIESC Journal, 2020, 71(12), 5735(in Chinese). 孙聪, 闫博威, 蔡长庸, 等. 化工学报, 2020, 71(12), 5735. 15 Ma H Y, Ji R L, Ma Y L, et al. Journal of the Chinese Ceramic Society, 2025, 53(2), 396(in Chinese). 马宏宇, 姬仁林, 马亚丽, 等. 硅酸盐学报, 2025, 53(2), 396. 16 Liu Q H, Yang P W, Chen R Y. Modern Chemical Industry, 2025, 45(2), 216(in Chinese). 刘启昊, 杨朋伟, 陈若愚. 现代化工, 2025, 45(2), 216. 17 Wang L L, Li D W. Bulletin of the Chinese Ceramic Society, 2018, 37(12), 3827(in Chinese). 王立利, 李东伟. 硅酸盐通报, 2018, 37(12), 3827. 18 Wu C Y, Chen W H, Zhang H F, et al. Construction and Building Materials, 2017, 144, 516. 19 Chen J W, Zhang Y Q, Chen Z F, et al. Materials Reports, 2024, 38(17), 77(in Chinese). 陈嘉伟, 张芸侨, 陈卓凡, 等. 材料导报, 2024, 38(17), 77. 20 Rouzic M L, Chaussadent T, Platret G, et al. Cement and Concrete Research, 2017, 91, 117. 21 Cui J M, Ma H R, Ma Z Y, et al. Materials Reports, 2025, 39(15), 24040219(in Chinese). 崔嘉铭, 马红瑞, 马哲洋, 等. 材料导报, 2025, 39(15), 24040219. 22 Zhang Z G, Qian Q X, Chen Y, et al. Journal of Safety and Environment, 2025, 25(1), 108(in Chinese). 张遵国, 钱清侠, 陈毅, 等. 安全与环境学报, 2025, 25(1), 108. 23 Mastalerz M, Hampton L, Drobniak A, et al. International Journal of Coal Geology, 2017, 178, 122. 24 Zeng T, Fang Y, Nan Y L, et al. Journal of Engineering Geology, 2024, 32(4), 1176(in Chinese). 曾涛, 方媛, 南亚林, 等. 工程地质学报, 2024, 32(4), 1176.
渝公网安备50019002502923号 版权所有：《材料导报》编辑部
2026, Vol. 40 
