Mechano-Chemical Modified Calcium Bentonite Improves Stability of Grouting Materials

被引：0

作者：

Zhang C. ^{[1
]}

Guan X. ^{[1
]}

Zhang H. ^{[1
]}

Gou M. ^{[1
]}

Hu E. ^{[1
]}

Wang H. ^{[1
]}

机构：

[1] School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo

来源：

Cailiao Daobao/Materials Reports | 2019年 / 33卷 / 10期

基金：

中国国家自然科学基金;

关键词：

Calcium bentonite; Crystal structure; Mechanical chemical modification; Suspension;

D O I：

10.11896/cldb.18090282

中图分类号：

学科分类号：

摘要：

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%. © 2019, Materials Review Magazine. All right reserved.

引用

页码：3408 / 3412

页数：4

共 13 条

[1] Ju J.Y., Shen D.X., Development and Application of Bentonite in Engineering, (2003)
[2] Hafshejani K.S., Moslemizadeh A., Shahbazi K., Applied Clay Science, 127-128, (2016)
[3] Wilson I., Bioresources, 7, 7, (2007)
[4] Jiang G.L., Bentonite Processing and Application, (2005)
[5] Dou H.J., Investigation on the performance and microscopic characteristics of complex cementitious-sodium silicate two-shot grouting materials, (2014)
[6] Calabria-Holley J., Papatzani S., Naden B., Et al., Applied Clay Science, 7, 143, (2017)
[7] Huang R., Western Resources, 7, 5, (2010)
[8] Feng G., Journal of the Chinese Ceramic Society, 45, 5, (2017)
[9] Zhang Q., Bulletin of the Chinese Ceramic Society, 45, 3, (2017)
[10] Yang N.R., Journal of Building Materials, 3, 1, (2000)

← 1 2 →