The role of pore-size distribution function on the estimation of engineering properties of unsaturated soil

Q. Zhai, H. Rahardjo, A. Satyanaga, G. L. Da, X. L. Zhaoi

Research output: Contribution to conferencePaperpeer-review

Abstract

Soil is a porous material which consists of a collection of soil particles with voids. The soil particles have different sizes with certain statistical distribution which are commonly described using grain-size distribution curve (GSD). The characteristic of GSD has significant effects on the engineering properties of the soil (especially for coarse-grained soil). On the other hand, the geometrical pore space in soil can be described by the pore-size distribution function (PSD). There are limited studies on the effect of PSD on the engineering properties of soil. For the soil with insignificant volume change, the soil-water characteristic curve (SWCC) is considered to be analogous to the PSD. In this paper, the soil skeleton is assumed to be rigid and the roles of PSD on the air/water flow in the unsaturated soil and on the unsaturated shear strength are explained. The proposed theories utilizing different PSDs are able to estimate the saturated hydraulic conductivities of different soil types. The proposed theories and equations are verified with experimental data from literatures.

Original languageEnglish
Pages382-389
Number of pages8
DOIs
Publication statusPublished - 2019
Externally publishedYes
Event7th Asia-Pacific Conference on Unsaturated Soils, AP-UNSAT 2019 - Nagoya, Japan
Duration: Aug 23 2019Aug 25 2019

Conference

Conference7th Asia-Pacific Conference on Unsaturated Soils, AP-UNSAT 2019
CountryJapan
CityNagoya
Period8/23/198/25/19

Keywords

  • Hydraulic conductivity
  • Pore-size distribution function
  • Soil-water characteristic curve
  • Unsaturated shear strength

ASJC Scopus subject areas

  • Soil Science

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