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, Wenwu1,2; Cui, Kai1,2,3
2020-03
Source PublicationEARTH SCIENCES RESEARCH JOURNAL
ISSN1794-6190
Volume24Issue:1Pages:55-59
AbstractIn 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.
Keywordgypsum rock dry-wet cycle particle flow numerical simulation water absorption porosity
DOI10.15446/esrj.v24n1.85486
Indexed BySCI
Language英语
WOS Research AreaGeology
WOS SubjectGeosciences, Multidisciplinary
WOS IDWOS:000522730800006
PublisherUNIV NACIONAL DE COLOMBIA
Citation statistics
Cited Times [WOS]:0   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.lut.edu.cn/handle/2XXMBERH/60012
Collection土木工程学院
Corresponding AuthorWu, Guopeng
Affiliation1.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
First Author AffilicationLanzhou University of Technology
Corresponding Author AffilicationLanzhou University of Technology
Recommended Citation
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.
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