Study of SWCC modeling parameters with variation in swelling behavior and mineralogy of four compacted expansive clays

A. Pedarla, A. J. Puppala, L. R. Hoyos, Claudia Zapata, B. Chittoori

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations

Abstract

The Soil Water Characteristic Curve (SWCC) represents the comprehensive physical, mineralogical and water retention properties of a soil. The pore size distribution and air entry head of the soil govern the expansive soil behavior and can be represented indirectly by their SWCC modeling parameters. Hence, the present research targets to study the variation of the SWCC modeling parameters with swell behavior and mineralogy of expansive clays. For this research study, four natural expansive clays having different degrees of expansiveness were selected. The clays were studied for basic soil classification and their clay mineralogy was determined using standard chemical analysis methods. The expansive behavior of the test soils was determined using standard 1-D vertical swell strain tests. The SWCC for all the four expansive soils were determined in the laboratory with the help of pressure cell and filter paper methods. The experimental data were fitted by the van Genuchten (1980) and Fredlund and Xing (1994) SWCC models and the variation of these SWCC parameters with swelling behavior of the soil are studied in detail. From this research, analytical equations involving SWCC modeling parameters and swell behavior were formulated.

Original languageEnglish (US)
Title of host publicationUnsaturated Soils
Subtitle of host publicationResearch and Applications - Proceedings of the 6th International Conference on Unsaturated Soils, UNSAT 2014
PublisherTaylor and Francis - Balkema
Pages951-957
Number of pages7
ISBN (Print)9781138026902
StatePublished - Jan 1 2014
Event6th International Conference on Unsaturated Soils, UNSAT 2014 - Sydney, NSW, Australia
Duration: Jul 2 2014Jul 4 2014

Publication series

NameUnsaturated Soils: Research and Applications - Proceedings of the 6th International Conference on Unsaturated Soils, UNSAT 2014
Volume2

Other

Other6th International Conference on Unsaturated Soils, UNSAT 2014
CountryAustralia
CitySydney, NSW
Period7/2/147/4/14

ASJC Scopus subject areas

  • Soil Science

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    Pedarla, A., Puppala, A. J., Hoyos, L. R., Zapata, C., & Chittoori, B. (2014). Study of SWCC modeling parameters with variation in swelling behavior and mineralogy of four compacted expansive clays. In Unsaturated Soils: Research and Applications - Proceedings of the 6th International Conference on Unsaturated Soils, UNSAT 2014 (pp. 951-957). (Unsaturated Soils: Research and Applications - Proceedings of the 6th International Conference on Unsaturated Soils, UNSAT 2014; Vol. 2). Taylor and Francis - Balkema.