Stress development in compacted block joints backfilled with bentonite powder in HLW barrier

doi:10.13722/j.cnki.jrme.2018.0006

	Stress development in compacted block joints backfilled with bentonite powder in HLW barrier
	H., Zhang ; Y., Wang ; G., Ma ; D., He ; F., Zhu
	2018-09-01
发表期刊	Yanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering
ISSN	10006915
卷号	37 期号:9 页码:2200-2208
摘要	In this study, an indoor simulation test is conducted to monitor the swelling process of joint area which is backfilled with bentonite powder. The basic mechanism of swell-sealing of joint between blocks is investigated with microstructure analysis. According to the swelling test, the swelling stress development in the joints of blocks is anisotropic. The growth rate of swelling stress at joint area is higher than that of axial direction. The swelling stress at top surface, which is far away from the wetting surface, lags behind that at the bottom surface due to the water migration and sidewall friction. With the increasing of saturation degree, the joint areas are squeezed and compacted under the radial and axial swelling stresses of blocks. The final dry density of blocks decrease and of joint area increases. According to the microstructure analysis, the number of micropores in the soil aggregates decreases and the number of macropores and connected pores increase gradually from the block center to the joint area. A certain width of transition zone is formed between blocks and joint areas. © 2018, Science Press. All right reserved.
关键词	Bentonite Joints (structural components) Microstructure Soil mechanics Wetting High level radioactive wastes Indoor simulation test Microstructure analysis Saturation degree Side-wall friction Stress development Swelling stress Transition zones
DOI	10.13722/j.cnki.jrme.2018.0006
收录类别	EI
语种	中文
出版者	Academia Sinica
EI入藏号	20184806161297
EI主题词	Powders
EI分类号	408.2 Structural Members and Shapes - 482.2 Minerals - 483.1 Soils and Soil Mechanics - 951 Materials Science
来源库	Compendex
分类代码	408.2 Structural Members and Shapes - 482.2 Minerals - 483.1 Soils and Soil Mechanics - 951 Materials Science
引用统计	无
文献类型	期刊论文
条目标识符	https://ir.lut.edu.cn/handle/2XXMBERH/114449
专题	兰州理工大学土木工程学院
作者单位	1.School of Civil Engineering and Mechanics, Lanzhou University, Lanzhou; Gansu; 730000, China; 2.School of Civil Engineering, Lanzhou University of Technology, Lanzhou; Gansu; 730050, China
推荐引用方式 GB/T 7714	H., Zhang,Y., Wang,G., Ma,et al. Stress development in compacted block joints backfilled with bentonite powder in HLW barrier[J]. Yanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering,2018,37(9):2200-2208.
APA	H., Zhang,Y., Wang,G., Ma,D., He,&F., Zhu.(2018).Stress development in compacted block joints backfilled with bentonite powder in HLW barrier.Yanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering,37(9),2200-2208.
MLA	H., Zhang,et al."Stress development in compacted block joints backfilled with bentonite powder in HLW barrier".Yanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering 37.9(2018):2200-2208.