<abstract xmlns="http://www.w3.org/1999/xhtml">

<p>The main aim of the study is to provide a preliminary formula to estimate the reduction in shear strength parameters of gypseous soil exhibited when soaked in water. Experimental work has been conducted using direct shear test on undisturbed samples with three different gypsum contents 4 %, 28 %, and 42 %. Three different cases were considered, first is soil with its field water content (semi-dry), second after soaked with kerosene, and third after soaked with distilled water. The kerosene was used for comparison purposes substituting water for non-gypseous soils because it has low chemical interaction with gypsum. For semi-dry cases, results show proportional relationship between peak shear strength and gypsum content. However, the opposite holds true once submerged with water in which soil cohesion fades and the frictional angle is reduced to 72 %, 56 %, and 52 % respectively for the given gypsum content. A formula has been proposed that can be used by practitioners to estimate the reduction in the frictional angle based on the gypsum content of the soil.</p>
</abstract>

The main aim of the study is to provide a preliminary formula to estimate the reduction in shear strength parameters of gypseous soil exhibited when soaked in water. Experimental work has been conducted using direct shear test on undisturbed samples with three different gypsum contents 4 %, 28 %, and 42 %. Three different cases were considered, first is soil with its field water content (semi-dry), second after soaked with kerosene, and third after soaked with distilled water. The kerosene was used for comparison purposes substituting water for non-gypseous soils because it has low chemical interaction with gypsum. For semi-dry cases, results show proportional relationship between peak shear strength and gypsum content. However, the opposite holds true once submerged with water in which soil cohesion fades and the frictional angle is reduced to 72 %, 56 %, and 52 % respectively for the given gypsum content. A formula has been proposed that can be used by practitioners to estimate the reduction in the frictional angle based on the gypsum content of the soil.

Preliminary Study on the Reduction in Shear Strength Parameters of Gypseous Soil upon Wetting

Department of Civil Engineering, College of Engineering

Civil and Environmental Engineering

This work is licensed under the Creative Commons Attribution 4.0 International License.

The main aim of the study is to provide a preliminary formula to estimate the reduction in shear strength parameters of gypseous soil exhibited when soaked in...

Preliminary Study on the Reduction in Shear Strength Parameters of Gypseous Soil upon Wetting

Published Online: Jun 29, 2022

Page range: 195 - 199

DOI: https://doi.org/10.2478/cee-2022-0018

Keywords
Gypseous soil, Direct shear, Soaked soil, Shear strength, Kerosene

© 2022 Akram H. Abd, published by Sciendo

This work is licensed under the Creative Commons Attribution 4.0 International License.

Preliminary Study on the Reduction in Shear Strength Parameters of Gypseous Soil upon Wetting

Published Online: Jun 29, 2022

Page range: 195 - 199

DOI: https://doi.org/10.2478/cee-2022-0018

KeywordsGypseous soil, Direct shear, Soaked soil, Shear strength, Kerosene

© 2022 Akram H. Abd, published by Sciendo

This work is licensed under the Creative Commons Attribution 4.0 International License.

Keywords
Gypseous soil, Direct shear, Soaked soil, Shear strength, Kerosene