Gelation and Consolidation Characteristics of Cement-Sodium Silicate Grout within Water

被引：4
|
作者：
Lin, Rongfeng [1 ]
Jin, Qing [1 ]
Zhang, Yaolei [1 ]
Pan, Guangming [2 ]
Qin, Jianwen [3 ]
Huang, Zejing [4 ]
机构：
[1] Shandong Univ, Geotech & Struct Engn Res Ctr, Jinan 250061, Peoples R China
[2] Shandong Coal Geol Bur, Prospecting Team 4, Weifang 250100, Peoples R China
[3] Guangxi Geol Environm Monitoring Stn, Guigang 537100, Peoples R China
[4] Guangxi Guigang Nat Resources Bur, Guigang 537100, Peoples R China
来源：
PROCESSES | 2022年 / 10卷 / 03期
基金：
中国国家自然科学基金;
关键词：
cement-sodium silicate grout; gelation property; grout consolidation; water environment; compressive strength; microstructure;
D O I：
10.3390/pr10030531
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
Cement-sodium silicate grout (CSG) is now widely adopted in water plugging engineering to prevent water inrush disasters, and the gelation and consolidation characteristics of CSG in water environment significantly affect the grouting effect. To obtain an in-depth understanding of the performance of CSG in water, the CSGs with different water-cement ratios and volume ratios were tested, and the gelation properties, the deposition characteristics and the diffusion process of CSG within water were examined. The compressive strength and microstructure of CSG consolidation formed in air and water were also analyzed comparatively. The test results indicate that the CSG consolidation exhibits obvious stratification and segregation phenomena in water, which can be divided into three layers with different substance compositions. The compressive strength of CSG consolidation formed in water is much lower than that of the grout consolidation formed in air, indicating that the water environment has a significant weakening effect on the consolidation properties of CSG. The hydration products and microstructure of CSG consolidation in water change clearly due to the dilution effect of water.
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页数：15
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