干旱区生态环境知识资源中心(Arid): Experimental study on karst development characteristics of calcrete and analysis of its dissolution mechanism

Arid

DOI	10.1007/s13146-022-00787-0
	Experimental study on karst development characteristics of calcrete and analysis of its dissolution mechanism
	Zhang, Ke-neng; Zhu, Kao-fei; He, Yong; Zhang, Yun-yi
通讯作者	He, Y
来源期刊	CARBONATES AND EVAPORITES
ISSN	0891-2556
EISSN	1878-5212
出版年	2022
卷号	37 期号:3
英文摘要	Karst is widely distributed throughout the world and has a significant impact on the ecological environment and engineering construction. In this study, a 3D geological model of calcrete karst near the Liuyang River was established through field investigation. The texture and mineral composition of calcrete were investigated by thin section identification, X-ray diffraction (XRD) test, and electron probe microanalysis (EPMA). Moreover, dissolution tests and uniaxial compressive strength tests were performed to analyze the karst development characteristics and dissolution mechanism of calcrete. Experimental results demonstrated that the calcrete karst is primarily distributed near the river with a small development scale, and 85.96% of the caves are filled with gravels and clay. The cementation component of calcrete is mainly composed of calcite, accounting for approximately 20%. Meanwhile, calcrete contains a large number of insoluble clastic particles, which were deposited in the karst caves after dissolution. The dissolution test results revealed that the dissolution of calcite cement destroyed the rock texture. The dissolution rate of calcrete increased linearly with increasing H+ concentration. In addition, the strength of rock decreased with karstification, and grouting was effective in treating calcrete karst by reinforcing the fillings. These findings are theoretically important for calcrete karst geology research and highly practical for engineering construction.
英文关键词	Calcrete karst Karst development characteristics Dissolution test Dissolution mechanism
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000801177400001
WOS关键词	CARBONATE ROCKS ; DESERTIFICATION ; CAVES ; AREA ; GEOMORPHOLOGY ; EVOLUTION ; LIMESTONE ; CONDUITS ; AQUIFERS ; ORIGIN
WOS类目	Geology
WOS研究方向	Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/392057
推荐引用方式 GB/T 7714	Zhang, Ke-neng,Zhu, Kao-fei,He, Yong,et al. Experimental study on karst development characteristics of calcrete and analysis of its dissolution mechanism[J],2022,37(3).
APA	Zhang, Ke-neng,Zhu, Kao-fei,He, Yong,&Zhang, Yun-yi.(2022).Experimental study on karst development characteristics of calcrete and analysis of its dissolution mechanism.CARBONATES AND EVAPORITES,37(3).
MLA	Zhang, Ke-neng,et al."Experimental study on karst development characteristics of calcrete and analysis of its dissolution mechanism".CARBONATES AND EVAPORITES 37.3(2022).