Presentation Title

Reduction in Shear Strength of Clayey Soils due to Leaching of Saline Water

Start Date

November 2016

End Date

November 2016

Location

HUB 265

Type of Presentation

Oral Talk

Abstract

Landslides can cause substantial damage to infrastructure, loss of lives and have significant economic consequences. The stability of landslides will depend on the shear strength of the material composing the slope. Landslides are frequently reoccurring in coastal areas, where the water contains sodium chloride (NaCl). Previous studies have suggested that varying NaCl concentrations can affect soil strength. Specifically, reductions in the NaCl concentration by leaching caused by infiltrating rainwater can cause a reduction in the shear strength of soil adversely affecting the stability of the slopes. In this study, mixtures of kaolinite, montmorillonite and quartz were prepared with saline water. These mixtures were tested using the direct simple shear device to determine the strength of material. The resulting strengths were compared to those obtained when the samples were prepared with distilled water. The results showed that the strengths of the samples with distilled water were lower than the strengths of the samples with saline water. However, greater reductions were found in samples containing montmorillonite in comparison to the samples containing kaolinite.

This document is currently not available here.

Share

COinS
 
Nov 12th, 3:00 PM Nov 12th, 3:15 PM

Reduction in Shear Strength of Clayey Soils due to Leaching of Saline Water

HUB 265

Landslides can cause substantial damage to infrastructure, loss of lives and have significant economic consequences. The stability of landslides will depend on the shear strength of the material composing the slope. Landslides are frequently reoccurring in coastal areas, where the water contains sodium chloride (NaCl). Previous studies have suggested that varying NaCl concentrations can affect soil strength. Specifically, reductions in the NaCl concentration by leaching caused by infiltrating rainwater can cause a reduction in the shear strength of soil adversely affecting the stability of the slopes. In this study, mixtures of kaolinite, montmorillonite and quartz were prepared with saline water. These mixtures were tested using the direct simple shear device to determine the strength of material. The resulting strengths were compared to those obtained when the samples were prepared with distilled water. The results showed that the strengths of the samples with distilled water were lower than the strengths of the samples with saline water. However, greater reductions were found in samples containing montmorillonite in comparison to the samples containing kaolinite.