| INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
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| Mechano-Chemical Modified Calcium Bentonite Improves Stability of Grouting Materials |
| ZHANG Chaofan, GUAN Xuemao, ZHANG Haibo, GOU Mifeng, HU Enli, WANG Heng
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| School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo 454003 |
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Abstract Modification of calcium bentonite by mechanical and mechano-chemical chemistry using a high energy ball mill. The structure and properties of modified muscovites were characterized by X-ray diffractometer, scanning electron microscopy, laser scattering analysis and Zeta potential analyzer, respectively. Then the bentonite modified by mechanical force and the bentonite modified by mechano-chemical force were respectively added to the cement slurry with a water-to-binder ratio of 1. The results show that after mechano-chemical modification, d (001) is changed from 1.52 nm to 1.27 nm, and the calcium ions between the layers of bentonite are replaced by sodium ions, D50 decreases from unmodified 13.5 μm to 0.64 μm, the zeta potential changes from unmodified －5.5 mV to －66.3 mV, which can achieve the dual purposes of particle size reduction and surface modification. After 45 minutes of grinding by high-energy ball mill, the bentonite can make the cement slurry stand for 2 h and the bleeding rate reaches 3.97%. The bentonite after wet grinding of sodium pyrophosphate and bentonite for 15 minutes can make the bleeding rate of the cement slurry reach 3.64%.
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Published: 29 August 2019
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| About author:: Chaofan Zhang, a graduate student at Henan Polytechnic University. She is mainly engaged in the research of deep processing of green building materials and non-metallic minerals.Xuemao Guan , professor at Henan Polytechnic University, doctoral tutor. He joined the work in 1988 and is currently the Dean of the School of Materials Science and Engineering at Henan Polytechnic University. Young backbone teachers of colleges and universities in Henan Province, outstanding teachers of Henan Pro-vince, and recipients of the Outstanding Youth Fund of Henan Province. His research direction: (1) new building materials, mainly engaged in research and application technology research of high-strength and high-performance concrete; research on functional building materials; environmental service behavior and mechanism research of concrete engineering; durability design, prediction and construction of concrete engineering And research and application of control technology. (2) Concrete admixture, mainly engaged in the research and development of high-efficiency water reducer for concrete; research and development of mineral admixtures. (3) Mining engineering, mainly engaged in mine roadway support technology and support material research, mine fil-ling technology and filling material research. In recent years, he has presided over and participated in 27 national and provincial-level scientific research projects, among which 6 projects, including “superfine green high-perfor-mance cement-based grouting repair materials preparation technology”, have been awarded provincial-level scientific and technological progress. After the award, 4 won the third prize of provincial scientific and technological progress; published 56 academic papers, including 12 incomes from SCI and EI. At present, he has undertaken the Outstanding Youth Fund Project of Henan Province-“Research on the Durability and Mechanism of Concrete”, and more than 10 provincial-level scientific and technological projects and technical services, including the research project of “Green New Concrete High Performance Water Reducer” in Henan Province project. |
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Ju J Y, Shen D X. Development and application of bentonite in enginee-ring, China Building Materials Industry Press,China,2003(in Chinese).鞠建英, 申东铉. 膨润土在工程中的开发与应用, 中国建材工业出版社, 2003.2 Hafshejani K S, Moslemizadeh A, Shahbazi K. Applied Clay Science, 2016, 127-128,23.3 Wilson I. Bioresources, 2007, 7(7),1684.4 Jiang G L.Bentonite processing and application, Chemical Industry Press, China,2005(in Chinese).姜桂兰. 膨润土加工与应用, 化学工业出版社, 2005.5 Dou H J. Investigation on the performance and microscopic characteristics of complex cementitious-sodium silicate two-shot grouting materials. Master’s Thesis, China University of Geosciences (Beijing),China, 2014(in Chinese).豆海军.复合水泥基-水玻璃双液注浆材料性能及微观特性研究.硕士学位论文,中国地质大学(北京),2014.6 Calabria-Holley J, Papatzani S, Naden B, et al. Applied Clay Science, 2017, 143,67.7 Huang R. Western Resources, 2010(5),36(in Chinese). 黄荣.西部资源, 2010(5),36.8 Feng G. Journal of the Chinese Ceramic Society, 2017, 45(5),737(in Chinese).冯刚.硅酸盐学报,2017, 45(5),737.9 Zhang Q. Bulletin of the Chinese Ceramic Society, 2017(3),942(in Chinese). 张乾等.硅酸盐通报, 2017(3),942.10 Yang N R. Journal of Building Materials, 2000, 3(1),19(in Chinese).杨南如.建筑材料学报,2000, 3(1),19.11 Yang N R. Journal of Building Materials, 2000,3(2),93(in Chinese).杨南如.建筑材料学报,2000,3(2),93.12 Shah L A, Ehsan A M, Khattak N S. Applied Clay Science, 2013, 84(10),50.13 Wang J,Wang X H,Liu Z Y. Non-Metallic Mines, 2017(4),23(in Chinese).万江,王晓焕,刘志勇.非金属矿,2017(4),23.
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2019, Vol. 33 
