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CONSOLIDATION PROPERTIES OF COHESIVE SOILS IN THE RED RIVER DELTA IN SALT-AFFECTED CONDITIONS

Truc Nguyen Ngoc

First published: 2017-06-20https://doi.org/10.5593/sgem2017/12/s02.019View metrics

Abstract

Saline intrusion related to drought and sea level rise may result in changing of engineering properties of cohesive soils. To comprehend the variation of geotechnical properties of soils intruded by saline water, consolidation is one of the important aspects should be investigated. Undisturbed soil samples that originated from sediment in the Red River delta, Vietnam, were chosen. In the conditions that soils had been fully saturated by solution of four salt concentrations, 0.0, 9.9, 19.8 and 33пїЅ, the variation of geotechnical parameters of the soils were verified. Consolidation of soil specimens change almost proportionally to the concentration of saline water. Namely, coefficient of consolidation decrease proportionally to salinity, meanwhile compressibility index and secondary compression index increase with the same conditions. The change of consolidation properties of the cohesive soils in the Red River delta in saline media is believed to be related to clay mineral composition. The presence of expandable clay mineral together with a series of physico-chemical interactions bringing about neutralizing of negative charge of clay is considered as reason of those changes.

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Publication details

Title
CONSOLIDATION PROPERTIES OF COHESIVE SOILS IN THE RED RIVER DELTA IN SALT-AFFECTED CONDITIONS
Authors
Truc Nguyen Ngoc
Proceedings
SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 17th International Multidisciplinary Scientific GeoConference SGEM2017, Science and Technologies in Geology, Exploration and Mining
Publisher
STEF92 Technology
Year
2017
Pages
143-150
SWS Citekey
NguyenNgoc20172143150
ISSN
1314-2704
ISBN
978-619-7105-99-5
Language
en
Publication type
Conference Paper
Keywords
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Number of times cited according to Crossref: 2

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