TY - JOUR
T1 - Proposal of a chemical weathering model for mechanical analysis of cemented sandstone using DDA
AU - Gao, Jingyao
AU - Chen, Guangqi
AU - Mitani, Yasuhiro
AU - Li, Changze
AU - Guo, Longxiao
N1 - Funding Information:
This work was supported by China Scholarship Council (CSC, No. 202108050072 ), JSPS KAKENHI Grant Numbers JP19KK0121 , and the SKLGP open fund ( SKLGP2018K009 ). The financial supports are gratefully acknowledged. Also, this work was partly supported by the co-research project conducted by Kyushu University. The financial supports are gratefully acknowledged.
Publisher Copyright:
© 2022 Elsevier Ltd
PY - 2022/5
Y1 - 2022/5
N2 - A chemical weathering model based on Discontinuous Deformation Analysis(DDA) was proposed in this study to shed light on the microscopic origin of the mechanical behaviors of cemented sandstone with different chemical weathering degrees. The main deterioration of the microstructure induced by chemical weathering was represented by the loss of cement between polygonous grains skeleton. By conducting uniaxial compression tests, the result revealed that the proposed model that considered the geometric and contact heterogeneity was feasible to characterize the degradation of strength and deformation properties with the enhancement of the weathering degree. In addition, the discrepant failure patterns along the degree of chemical weathering were elaborated from the initiation of fracture at the grain scale, showing a correlation to the cement and porosity.
AB - A chemical weathering model based on Discontinuous Deformation Analysis(DDA) was proposed in this study to shed light on the microscopic origin of the mechanical behaviors of cemented sandstone with different chemical weathering degrees. The main deterioration of the microstructure induced by chemical weathering was represented by the loss of cement between polygonous grains skeleton. By conducting uniaxial compression tests, the result revealed that the proposed model that considered the geometric and contact heterogeneity was feasible to characterize the degradation of strength and deformation properties with the enhancement of the weathering degree. In addition, the discrepant failure patterns along the degree of chemical weathering were elaborated from the initiation of fracture at the grain scale, showing a correlation to the cement and porosity.
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U2 - 10.1016/j.compgeo.2022.104661
DO - 10.1016/j.compgeo.2022.104661
M3 - Article
AN - SCOPUS:85124690711
SN - 0266-352X
VL - 145
JO - Computers and Geotechnics
JF - Computers and Geotechnics
M1 - 104661
ER -