Swelling pressure for bentonite-sand mixture subjected to drying and wetting application

Publication Title
Swelling pressure for bentonite-sand mixture subjected to drying and wetting application

Abstract

This study focuses on the effect of suction for bentonite-sand mixture through a series of testing programs, and consist of measurement variety of water content distribution, evaluation of the reduction of unconfined compressive strength under not uniformity distribution of suction in the soil, determination of soil-water characteristic curve on high suction ranges and providing for swelling pressure associated to chemical components. The summary of obtained results is relevant to for deep geological disposal with a multi-barrier system, and provide as hydration-mechanical-chemical phenomena. Materials used for this testing program are sodium bentonite, calcium bentonite and the different silica sands. Vapor pressure technique was used to control high suction which is recognized one of high suction control method, and salt solutions are prepared. Also, salinity water (i.e. salt water) was used to compare to measurement of swelling pressures for calcium bentonite subjected to suction increment and decrement due to distilled water absorption.

Authors
S Iso; T Motoshima; T. Nishimura

Published In

9th International Congress on Environmental Geotechnics (ICEG2023)

Theme

Engineered Barriers

DOI
https://doi.org/10.53243/ICEG2023-26

International Society for Soil Mechanics and Geotechnical Engineering

Contact Information

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