The numerical simulation of the drying-wetting cycles' influence on the deterioration characteristics of gypsum rocks under particle flow code

doi:10.15446/esrj.v24n1.85486

IR > 土木工程学院

	The numerical simulation of the drying-wetting cycles' influence on the deterioration characteristics of gypsum rocks under particle flow code
	Wu, Guopeng1,2,3 ; Chen, Wenwu 1,2; Cui, Kai1,2,3
	2020-03
发表期刊	EARTH SCIENCES RESEARCH JOURNAL
ISSN	1794-6190
卷号	24 期号:1 页码:55-59
摘要	In order to study the influence of dry-wet cycling on the deterioration characteristics of gypsum rocks and solve the problems encountered in engineering construction, in this study, gypsum rocks are taken as the research object. With the combination of laboratory test and theoretical analysis, the numerical simulation of particle flow is carried out, and the deterioration characteristics of physical and mechanical properties of gypsum rock under dry-wet cycling are studied. The results show that gypsum, quartz, zeolite and dolomite are the main components of gypsum rocks. Gypsum occupies the most components in gypsum rocks, so the various characteristics of gypsum greatly affect the characteristics of gypsum rocks. The process of water absorption and loss of gypsum is similar, which shows that the rate of water absorption or loss of gypsum is faster in the early stage, and tends to be stable in the later stage. The curve of the whole process of water absorption and loss is fitted by negative exponential function, and the effect is better. The larger the porosity of gypsum rock is, the better its water absorption performance is. Intergranular pore, dissolution pore and dissolution pore are the main pore types of gypsum rock. Intergranular pore is the main water absorption channel of gypsum rock. The cumulative water absorption increases with the increase of wetting and drying cycles. The change of water absorption curve is mainly manifested in water absorption rate and time. The more the number of wet-dry cycles is, the higher the water absorption rate in the early stage of water absorption is, the closer the characteristic curve to the coordinate axis of water absorption is, and the shorter the water absorption time is. In contrast, the shape difference of water loss curve is very small. It can be seen from this that in the process of wetting and drying cycle, the hydrophysical and hydrochemical processes promote each other, which changes the crystal structure and pore structure of gypsum rocks, reduces the crystal strength and increases the porosity, thus leading to the deterioration of the mechanical properties of gypsum rocks.
关键词	gypsum rock dry-wet cycle particle flow numerical simulation water absorption porosity
DOI	10.15446/esrj.v24n1.85486
收录类别	SCI ; SCIE
语种	英语
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:000522730800006
出版者	UNIV NACIONAL DE COLOMBIA
来源库	WOS
引用统计	被引频次：1[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	https://ir.lut.edu.cn/handle/2XXMBERH/60012
专题	土木工程学院
通讯作者	Wu, Guopeng
作者单位	1.Lanzhou Univ, Dept Geol Engn, Key Lab Mech Disaster & Environm Western China, Lanzhou 730000, Peoples R China; 2.Lanzhou Univ, Sch Civil Engn & Mech, Lanzhou 730000, Peoples R China; 3.Lanzhou Univ Technol, Dept Geotech Engn, Key Lab Disaster Prevent & Mitigat Civil Engn Gan, Lanzhou 730050, Peoples R China
第一作者单位	兰州理工大学
通讯作者单位	兰州理工大学
推荐引用方式 GB/T 7714	Wu, Guopeng,Chen, Wenwu,Cui, Kai. The numerical simulation of the drying-wetting cycles' influence on the deterioration characteristics of gypsum rocks under particle flow code[J]. EARTH SCIENCES RESEARCH JOURNAL,2020,24(1):55-59.
APA	Wu, Guopeng,Chen, Wenwu,&Cui, Kai.(2020).The numerical simulation of the drying-wetting cycles' influence on the deterioration characteristics of gypsum rocks under particle flow code.EARTH SCIENCES RESEARCH JOURNAL,24(1),55-59.
MLA	Wu, Guopeng,et al."The numerical simulation of the drying-wetting cycles' influence on the deterioration characteristics of gypsum rocks under particle flow code".EARTH SCIENCES RESEARCH JOURNAL 24.1(2020):55-59.