干旱区生态环境知识资源中心(Arid): Engineering properties on salt rock as subgrade filler in dry salt lake: Water retention characteristics and water migration patterns

Arid

DOI	10.1016/j.conbuildmat.2023.133414
	Engineering properties on salt rock as subgrade filler in dry salt lake: Water retention characteristics and water migration patterns
	Song, Liang; Chen, Shaochang; Wang, Chaohui; Wen, Penghui; Chen, Haoyu
通讯作者	Wang, CH ; Wen, PH
来源期刊	CONSTRUCTION AND BUILDING MATERIALS
ISSN	0950-0618
EISSN	1879-0526
出版年	2023
卷号	406
英文摘要	As a special road material, salt rock has high strength and stability in arid areas, and has broad application prospects in highway engineering construction in dry salt lake areas. To investigate the water retention characteristics of salt rock and its water migration patterns under the covering effect, and to ensure the long-term durability of salt rock subgrade, this study presents a comprehensive analysis of the effect of initial dry density on the water retention characteristics of fine-grained salt rock fillers. The soil-water characteristic curve model of salt rock was recommended. The capillary water migration patterns of salt rock were proved. The water migration patterns of salt rock under freeze-thaw cycles were clarified. The hydrothermal state of salt rock subgrade under the influence of pavement overburden was evaluated based on the field monitoring. The results indicated that the water retention capacity of fine-grained salt rock filler increases with the decrease of initial dry density during the high suction stage. The Fredlund & Xing model is recommended to address the soil-water characteristic curve of fine-grained salt rock. The capillary action of salt rock filler decreases with increasing compaction. The temperature gradient from the upper boundary to the bottom of the soil column under the effect of freeze-thaw cycles is significant. After five freeze-thaw cycles, the water in the soil column continued to migrate upwards under the covering effect and temperature gradient. The relative humidity and temperature of the salt rock subgrade both show a sinusoidal cyclical variation. When the temperature range of salt rock sub grade is 6 degrees C-30 degrees C, the relative humidity of subgrade is significantly correlated with temperature. This study can provide theoretical support for the disaster prevention and control of salt rock subgrade covering effect in the Lop Nor area.
英文关键词	Road engineering Salt rock subgrade filler Soil-water characteristic curve Covering effect Water migration Hydrothermal monitoring
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001081322400001
WOS关键词	COARSE-GRAINED SOIL ; PHASE-CHANGE ; SUCTION
WOS类目	Construction & Building Technology ; Engineering, Civil ; Materials Science, Multidisciplinary
WOS研究方向	Construction & Building Technology ; Engineering ; Materials Science
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/395823
推荐引用方式 GB/T 7714	Song, Liang,Chen, Shaochang,Wang, Chaohui,et al. Engineering properties on salt rock as subgrade filler in dry salt lake: Water retention characteristics and water migration patterns[J],2023,406.
APA	Song, Liang,Chen, Shaochang,Wang, Chaohui,Wen, Penghui,&Chen, Haoyu.(2023).Engineering properties on salt rock as subgrade filler in dry salt lake: Water retention characteristics and water migration patterns.CONSTRUCTION AND BUILDING MATERIALS,406.
MLA	Song, Liang,et al."Engineering properties on salt rock as subgrade filler in dry salt lake: Water retention characteristics and water migration patterns".CONSTRUCTION AND BUILDING MATERIALS 406(2023).