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

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...

Full description

Saved in:
Bibliographic Details
Published inInternational Multidisciplinary Scientific GeoConference : SGEM Vol. 17; no. 1.2; pp. 143 - 150
Main Author Truc, Nguyen Ngoc
Format Conference Proceeding
LanguageEnglish
Published Sofia Surveying Geology & Mining Ecology Management (SGEM) 01.01.2017
Subjects
Civil engineering
Clay
Clay minerals
Climate change
Cohesion
Cohesive soils
Compressibility
Compression
Compression index
Consolidation
Drought
Experiments
Fluvial sediments
Geotechnical engineering
Gravity
Interactions
Intrusion
Mineral composition
Minerals
Moisture content
Organic chemistry
Physical properties
Rivers
Saline intrusion
Saline water
Salinity
Salt
Saltwater intrusion
Sea level
Sea level changes
Sea level rise
Sediment samples
Soil
Soil compressibility
Soil conditions
Soil investigations
Soil properties
Soil water
Vietnam
Japan
Malaysia
Red River
Online AccessGet full text

Cover

More Information
Summary: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 33‰, 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.
ISSN:1314-2704
DOI:10.5593/sgem2017/12