Please use this identifier to cite or link to this item:
http://hdl.handle.net/10397/89520
Title: | A new water retention model that considers pore non-uniformity and evolution of pore size distribution | Authors: | Cheng, Q Ng, CWW Zhou, C Tang, CS |
Issue Date: | Oct-2019 | Source: | Bulletin of engineering geology and the environment, Oct. 2019, v. 78, no. 7, p. 5055-5065 | Abstract: | Pore size distribution (PSD), which is usually measured using mercury intrusion porosimetry (MIP) tests, is often used to predict the water retention curve (WRC) of unsaturated soil. Existing models generally predict the drying path of the WRC only because the intrusion of non-wetting mercury in MIP tests is equivalent to air entry during drying. Moreover, the PSD changes under hydro-mechanical loads, which has a significant effect on water retention behaviour. In this study, a new model is developed to predict both the main drying and wetting paths of WRCs. Based on a single PSD at reference stress and suction conditions, we quantified the influence of pore non-uniformity on MIP test results and the main drying and wetting paths of WRCs using the new model. From the reference PSD, we determined variation in the PSD with stress and suction and incorporated this variation into modelling of the WRC. The newly developed model was applied to simulate the PSD variation and the hysteretic WRC of different soils. Based on the results, it is evident that the new model is able to capture the evolution of the PSD during drying, wetting and compression. Moreover, the main drying and wetting paths of WRCs of unsaturated soil were closely predicted. | Keywords: | Main drying and wetting Non-uniformity Pore size distribution Water retention |
Publisher: | Springer | Journal: | Bulletin of engineering geology and the environment | ISSN: | 1435-9529 | DOI: | 10.1007/s10064-019-01476-4 | Rights: | © Springer-Verlag GmbH Germany, part of Springer Nature 2019 This is a post-peer-review, pre-copyedit version of an article published in Bulletin of Engineering Geology and the Environment. The final authenticated version is available online at: https://doi.org/10.1007/s10064-019-01476-4. |
Appears in Collections: | Journal/Magazine Article |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
a0692-n20_985_Final (18).pdf | Pre-Published version | 946.62 kB | Adobe PDF | View/Open |
Page views
60
Last Week
0
0
Last month
Citations as of Apr 28, 2024
Downloads
20
Citations as of Apr 28, 2024
SCOPUSTM
Citations
20
Citations as of Apr 26, 2024
WEB OF SCIENCETM
Citations
20
Citations as of May 2, 2024
Google ScholarTM
Check
Altmetric
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.