1 Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Qinghai Institute of Salt Lake, Chinese Academy of Sciences,Xining 810008, China 2 Key Laboratory of Salt Lake Resources Chemistry of Qinghai Province, Xining 810008, China 3 University of Chinese Academy of Science, Beijing 100049, China 4 Department of Civil Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China 5 Civil Engineering Institute, Qinghai University, Xining 810016, China
Abstract: Asalt lake magnesium potassium phosphate cement (MKPC) was prepared directly by using the by-products of extracting lithium boron magnesium oxide (B-MgO) as raw material and reaction with potassium dihydrogen phosphate after appropriate treatment without admixture. The influence law of hydration hardening process of MKPC was studied by testing the setting time, hydration heat temperature, compressive strength, porosity and analyzing the phase composition and microstructure of different MgO/KH2PO4 (M/K)mass ratio. The results indicate that M/K mass ratio has significant influence on hydration heat curve, compressive strength and porosity of MKPC. There exists an optimum M/K mass ratio of 1∶1 to 2∶1, which can make the compressive strength of MKPC higher at all curing times, the maximum strength of 3 h up to 87.2 MPa and keep the maximum hydration exothermic temperature and porosity in the optimum range. In hardened MKPC with the optimum M/K mass ratio, more hydrates are formed and grow perfectly and stably with few defects and cracks insulting in perfect microstructure.
董金美, 肖学英, 李颖, 文静, 郑卫新, 常成功, 余红发. 原料质量配比对盐湖磷酸钾镁水泥性能和微观结构的影响[J]. 材料导报, 2020, 34(10): 10041-10045.
DONG Jinmei, XIAO Xueying, LI Ying, WEN Jing, ZHENG Weixin, CHANG Chenggong, YU Hongfa. Influences of Raw Materials Mass Ratio on Properties and Microstructure of Salt Lake Magnesium Potassium Phosphate Cement. Materials Reports, 2020, 34(10): 10041-10045.
1 Mathieu Le Rouzic, Thierry Chaussadent, Gérard Platret, et al. Cement and Concrete Research, 2017, 91(1), 117. 2 Viani A, Peréz-Estébanez M, Pollastri S, et al. Cement and Concrete Research, 2015, 79, 344. 3 Jiang H Y, Liang B, Zhang L M. Journal of Building Materials, 2001, 4 (2), 196(in Chinese). 姜洪义, 梁波, 张联盟. 建筑材料学报, 2001, 4 (2), 196. 4 Yang Q, Zhang S, Wu X. Cement and Concrete Research, 2002, 32(1), 165. 5 Ma H Y, Xu B W, Li Z J. Cement and Concrete Research, 2014, 65, 96. 6 Li J S, Xu G D, Chen Y Z, et al. Construction and Building Materials, 2014, 69, 346. 7 Wagh A S. Chemically bonded phosphate ceramics, Oxford: Elsevier Scie-nce Ltd, 2004. 8 Péra J, Ambroise J. Cement and Concrete Composites, 1998, 20(1), 31. 9 Patrick K Donahue, Matthew D Aro. Construction and Building Mate-rials, 2010, 24(2), 215. 10 Ribeiro D V, Agnelli J A M, Morelli M R. Materials Research, 2013, 16(5), 1113. 11 Yang J M, Qian C X, Zhang Q H, et al. Journal of Southeast University (Natural Science Edition), 2010, 40(2), 373(in Chinese). 杨建明, 钱春香, 张青行, 等. 东南大学学报(自然科学版), 2010, 40(2), 373. 12 Soudée E, Péra J. Cement and Concrete Research, 2002, 32(1), 153. 13 Liu Y H, Deng T L. World Sci-Tech R & D, 2006, 28(5), 69(in Chinese). 刘元会, 邓天龙. 世界科技研究与发展, 2006, 28(5), 69. 14 Zhu Z H, Zhu C L, Wen X M, et al. Journal of Salt Lake Research, 2008, 16(3), 64(in Chinese). 祝增虎, 朱朝梁, 温现明, 等. 盐湖研究, 2008, 16(3), 64. 15 Ma P H. Progress in Chemistry, 2009, 21(11), 2349(in Chinese). 马培华. 化学进展, 2009, 21(11), 2349. 16 Tan Y S, Yu H F, Li Y, et al. Ceramics International, 2014, 40 (8, Part B), 13543. 17 Tan Y S, Yu H F, Li Y, et al. Journal of the Chinese Ceramic Society, 2014, 42(11), 1362(in Chinese). 谭永山, 余红发, 李颖, 等. 硅酸盐学报, 2014, 42 (11), 1362. 18 Dong J M, Yu H F, Xiao X Y, et al. Journal of Wuhan University of Technology Materials Science, 2016, 31(3), 671. 19 Weill D, Bradik J. US patent, 4756762, 1988-06-12. 20 Wu Z W, Lian H Z. High performance concrete, China Railway Press, China, 1999(in Chinese). 吴中伟, 廉慧珍. 高性能混凝土, 中国铁道出版社, 1999.
渝公网安备50019002502923号 版权所有：《材料导报》编辑部
2020, Vol. 34 
