Experimental Study on Effects of NaCl Solutions on Soil-Water Characteristic Curves of Expansive Soil

Xiujuan Yang, Wojciech Tomasz Sołowski, Henghui Fan, Jinqian Dang

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Abstract

Soil-water characteristic curve (SWCC) is an important characteristic of unsaturated soil. This paper investigates the total suction of the MX-80 bentonite, under different saturation and different concentrations of sodium chloride solutions. To create the soil-water characteristic curves for different amounts of NaCl, but same dry densities, the study used chilled-mirror dewpoint WP4 potentiometer. The experimental results show that the concentration of salt in pore water has significant influence on the bentonite. With the increase of the NaCl concentration, the samples total suction increased gradually and the matric suction decreased. When the soil saturation was greater than 50%, the pore solution’s addition led to the rapid increase of the soil’s total suction. The
low concentration of salt has relatively little effect on the matric suction of the MX-80 bentonite; while when the ion concentration is high, the solutions’ matric suction has a very significant impact on the soil matric suction.
Original languageEnglish
Title of host publicationProceedings of China-Europe Conference on Geotechnical Engineering
Subtitle of host publication Volume 2
Pages1328-1331
Number of pages4
Volume2
ISBN (Electronic)978-3-319-97115-5
DOIs
Publication statusPublished - 2018
MoE publication typeA4 Article in a conference publication
EventChina-Europe Conference on Geotechnical Engineering - Vienna, Austria
Duration: 13 Aug 201816 Aug 2018

Publication series

NameSpringer Series in Geomechanics and Geoengineering
ISSN (Print)1866-8755

Conference

ConferenceChina-Europe Conference on Geotechnical Engineering
CountryAustria
CityVienna
Period13/08/201816/08/2018

Keywords

  • Expansive soil
  • Soil-water characteristic curve
  • Suction
  • Partially saturated soils with saline solutions
  • Chilled-mirror dew-point potentiometer

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