A General Best-Fitting Equation for the Multimodal Soil–Water Characteristic Curve
Zhao Y. Rahardjo H. Satyanaga A. Zhai Q. He J.
July 2023Springer Science and Business Media Deutschland GmbH
Geotechnical and Geological Engineering
2023#41Issue 53239 - 3252 pp.
The soil–water characteristic curve (SWCC) is one of the most crucial and fundamental soil properties in unsaturated soil mechanics. Many theories and equations have been developed to describe and best fit SWCC with unimodal or bimodal characteristics. In this study, a general best-fitting equation for SWCC with multimodal characteristics (bimodal and trimodal SWCC) is proposed. The parameters in the proposed equation are closely related to the properties of soil and variables in the SWCC. To evaluate the performance of the proposed equation in best-fitting multimodal SWCC that has more than two modalities, a trimodal SWCC soil mixture that consists of sand, kaolin and activated carbon has been prepared and tested in the laboratory in this study. The proposed equation has been evaluated with data from published literature and the newly developed soil mixture of trimodal SWCC. The proposed equation has shown high accuracy for best-fitting bimodal SWCC and trimodal SWCC.
Activated carbon , Multimodal soil–water characteristic curve , SWCC , Unsaturated soil mechanics
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Interdisciplinary Graduate School, Environment and Nanyang Water Research Institute, Nanyang Technological University, 1 Cleantech Loop, Singapore, 637141, Singapore
School of Civil and Environmental Engineering, Nanyang Technological University, Block N1, N1-01b-36, Singapore, Singapore
Department of Civil and Environmental Engineering, Nazarbayev University, 53, Kabanbay Batyr Ave, Astana, 010000, Kazakhstan
School of Civil Engineering, Southeast University, Nanjing, China
Natural Sciences and Science Education Academic Group, National Institute of Education, Nanyang Technological University, 1 Nanyang Walk, Singapore, 637616, Singapore
Interdisciplinary Graduate School
School of Civil and Environmental Engineering
Department of Civil and Environmental Engineering
School of Civil Engineering
Natural Sciences and Science Education Academic Group
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