Effect of salt solution on the permeability of the mixtures of soil and bentonite

Masami Ohtsubo, Mishra Anil Kumar, Loretta Li, Takahiro Higashi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

Consolidation tests were performed on the mixtures of basait soil and bentonite in the proportion of 100:10 and 100:20 to evaluate the effect of salt on the permeability of the soil mixtures. The test results demonstrated that the change in the concentration of added NaCl and CaCl2 from 0 to 1.0 molc/kg increased the hydraulic conductivity of the soil mixtures nearly tea-fold, but the extent of the change in the hydraulic conductivity was different according to the salt concentration range. The salt concentration effects were more pronounced For the soil mixture with higher bentonite percentage. The hydraulic conductivity exhibited marginal increases for the change in the Na and Ca concentration from 0 to 0.01 molc/L, but did significant rises for further increase in the salt concentration. The hydraulic conductivity at the void ratio corresponding to the optimum moisture content changed from 6.6 × 10-8 to 1.7 × 10-7 cm/s for the 100:10 mixtures and from 2.5 × 10-3 to 2.5 × 10 -7 cm/s for the 100:20 mixtures by changing Na and Ca concentrations from 0 to 1.0 molc/L.

Original languageEnglish
Title of host publication5th ICEG Environmental Geotechnics
Subtitle of host publicationOpportunities, Challenges and Responsibilities for Environmental Geotechnics - Proceedings of the ISSMGE 5th Int. Congress
Pages601-607
Number of pages7
Publication statusPublished - Dec 1 2006
Event5th ICEG Environmental Geotechnics: Opportunities, Challenges and Responsibilities for Environmental Geotechnics - International Society of Soil Mechanics and Geotechnical Engineering's (ISSMGE) 5th International Congress - Cardiff, Wales, United Kingdom
Duration: Jun 26 2006Jun 30 2006

Publication series

Name5th ICEG Environmental Geotechnics: Opportunities, Challenges and Responsibilities for Environmental Geotechnics - Proceedings of the ISSMGE 5th Int. Congress
VolumeI

Other

Other5th ICEG Environmental Geotechnics: Opportunities, Challenges and Responsibilities for Environmental Geotechnics - International Society of Soil Mechanics and Geotechnical Engineering's (ISSMGE) 5th International Congress
CountryUnited Kingdom
CityCardiff, Wales
Period6/26/066/30/06

All Science Journal Classification (ASJC) codes

  • Geotechnical Engineering and Engineering Geology
  • Civil and Structural Engineering
  • Environmental Engineering
  • Waste Management and Disposal

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  • Cite this

    Ohtsubo, M., Kumar, M. A., Li, L., & Higashi, T. (2006). Effect of salt solution on the permeability of the mixtures of soil and bentonite. In 5th ICEG Environmental Geotechnics: Opportunities, Challenges and Responsibilities for Environmental Geotechnics - Proceedings of the ISSMGE 5th Int. Congress (pp. 601-607). (5th ICEG Environmental Geotechnics: Opportunities, Challenges and Responsibilities for Environmental Geotechnics - Proceedings of the ISSMGE 5th Int. Congress; Vol. I).