What question did this study set out to answer?

The aim is to investigate the shear strength of unsaturated granular materials under low total stress conditions.

February 5, 2026

Suction Monitored Apparatus to Investigate Shear Strength of Unsaturated Granular Material at Low (Total) Stress

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Experimental setup measures shear strength in unsaturated soils, indicating enhanced understanding of landslides.

The aim is to investigate the shear strength of unsaturated granular materials under low total stress conditions.
Developed a novel unconfined compression testing apparatus with suction and volumetric strain monitoring.
Utilized photo capturing and image processing for volumetric strain evaluation.
Employed a low-capacity tensiometer for in situ suction monitoring in constant water content tests.
Tested silty sand specimens at varying strain rates.
The new apparatus allows for accurate measurement of shear strength at low total stress.
Volumetric strain and suction changes were effectively monitored during the tests.
Suction propagation was sufficiently captured at varying strain rates.

Nagy et al. (2025) studied this question.

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