气候变化领域集成服务门户(CCPortal): Multi-scale Experimental Investigations on the Deterioration Mechanism of Sandstone Under Wetting-Drying Cycles

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DOI	10.1007/s00603-020-02257-2
	Multi-scale Experimental Investigations on the Deterioration Mechanism of Sandstone Under Wetting-Drying Cycles
	Wang, Chong; Pei, Wansheng; Zhang, Mingyi; Lai, Yuanming; Dai, Jinpeng
发表日期	2021
ISSN	0723-2632
EISSN	1434-453X
起始页码	429
结束页码	441
卷号	54 期号:1
英文摘要	The repeated wetting-drying (WD) cycles can cause the deterioration of rock and thus affect the service performance of the related rock engineering, e.g., the crushed-rock embankment and the reservoir. The study comprehensively investigated the deterioration mechanism of sandstone under the WD cycles based on a series of multi-scale experiments, including the microstructure, the meso-micro pore characteristics, and the macroscopic physical and mechanical properties. The results indicate that the content of dissolved minerals and the permeability are two key factors that determine the deterioration effect caused by the WD cycles. During the WD cycles, the pore size range of sandstone becomes wider due to the formation of new small pores and the connection of original pores. Thus, low-density area forms within the samples, which causes the increasing of density dispersion. The structure deterioration weakens the physical and mechanical properties of the samples. The ultrasonic test indicates that the decreasing rate of the P-wave velocity is larger than that of the S-wave velocity, especially in the first 5 cycles. Besides, the exponential equations of uniaxial compressive strength and elastic modulus with the number of WD cycles are established to describe the deterioration of mechanical characteristics.
英文关键词	Wetting-drying cycles; Sandstone; Deterioration mechanism; Microstructure; Macroscopic properties
语种	英语
WOS研究方向	Engineering ; Geology
WOS类目	Engineering, Geological ; Geosciences, Multidisciplinary
WOS关键词	NUCLEAR-MAGNETIC-RESONANCE ; X-RAY TOMOGRAPHY ; FREEZE-THAW ; PORE STRUCTURE ; STABILITY ANALYSIS ; FRACTURE-TOUGHNESS ; SEISMIC STABILITY ; BEARING CAPACITY ; ROCK SLOPE ; STRENGTH
WOS记录号	WOS:000578552600001
来源期刊	ROCK MECHANICS AND ROCK ENGINEERING
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/239561
作者单位	[Wang, Chong; Pei, Wansheng; Zhang, Mingyi; Lai, Yuanming] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou 730000, Peoples R China; [Wang, Chong; Pei, Wansheng; Zhang, Mingyi; Lai, Yuanming] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Dai, Jinpeng] Lanzhou Jiaotong Univ, Lanzhou 730070, Peoples R China
推荐引用方式 GB/T 7714	Wang, Chong,Pei, Wansheng,Zhang, Mingyi,et al. Multi-scale Experimental Investigations on the Deterioration Mechanism of Sandstone Under Wetting-Drying Cycles[J],2021,54(1).
APA	Wang, Chong,Pei, Wansheng,Zhang, Mingyi,Lai, Yuanming,&Dai, Jinpeng.(2021).Multi-scale Experimental Investigations on the Deterioration Mechanism of Sandstone Under Wetting-Drying Cycles.ROCK MECHANICS AND ROCK ENGINEERING,54(1).
MLA	Wang, Chong,et al."Multi-scale Experimental Investigations on the Deterioration Mechanism of Sandstone Under Wetting-Drying Cycles".ROCK MECHANICS AND ROCK ENGINEERING 54.1(2021).