| Issue |
E3S Web Conf.
Volume 642, 2025
5th European Conference on Unsaturated Soils and Biotechnology applied to Geotechnical Engineering (EUNSAT2025 + BGE)
|
|
|---|---|---|
| Article Number | 03035 | |
| Number of page(s) | 6 | |
| Section | EUNSAT2025 - Experimental Evidence and Techniques | |
| DOI | https://doi.org/10.1051/e3sconf/202564203035 | |
| Published online | 14 August 2025 | |
Closed-Form SWCC Functions for Granular Mixtures
1 Óbuda University, AIAM Doctoral School, and Hydro-Bio-Mech. Systems Res. Center, Budapest, Hungary
2 Óbuda University, Rejtő Faculty and Hydro-Bio-Mech. Systems Res. Center, Budapest, Hungary;
3 Óbuda University, Ybl Miklós Faculty, Budapest, Hungary;
4 Department of Civil and Informatics Engineering, University of Roma Tor Vergata, Via del Politecnico, 1, 00133 Roma, Italy;
5 Texas A&M University
6 HUN-REN ATK TAKI, Budapest, Hungary
* Corresponding author: author@e-mail.org
Four closed-form water-retention functions (the Gardner, Fredlund – Xing, van Genuchten 4 and 5) were validated using the experimental, ideal water retention curve data of 7 granular fractions (fine gravel, sand and silt) and their 21 mixtures with fractal distribution (being similar to the Fuller curves), composed from 2 to 7 fractions. The measurement was approximate since some sand and kaolinite boxes designated for some fixed suction loads were used being proper for more plastic soils. The homothetic, fractal grading curves with N = 2, 3, ...7 fractions, resp.; resulted in homothetic SWCC-s. A data mining procedure was used to assess the precise shape. Then the discrimination study showed that the 5-parameter model of van Genuchten was the best and the Fredlund-Xing modelwas the secdond best. The results showed some interdependence of the parameters. Discussing the results by considering more complicated grading curve samples, the double Weibull function was found to be better for SWCC-s of gap-graded grading curves.
© The Authors, published by EDP Sciences, 2025
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