Geotechnical Engineering (한국지반공학회지:지반)

Korean Geotechnical Society (한국지반공학회)
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Effect of Sodium Chloride on Stress-Deformation of Sand Bentonite Mixture

염분이 모래와 벤토나이트 혼합토의 응력 변형에 미치는 영향

  • 안태봉 (정회원, 한국건설기술연구원 지반연구실)
  • Published : 1997.04.01
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Abstract

In this study sodium chloride solution is employed for chemicals, and several cylindrical triaxial tests are performed on the sand-bentonite mixtures saturated with sodium chloride solution. Deformation(elastic modulus, E) and strength(cohesion, c', and angle of friction, f') parameters are obtained from the triaxial tests as functions of confining pressure and sodium chloride solution concentrations. The results here indicate an increase in the value of effective cohesion with increase in the concentration of NaCl solution, which can be explained by using the Gouy-Chapman model. The value of the effective angle of shearing resistance does not show significant change with the increase in concentration of NaCl solution. The Young's modulus also increases with the increase in concentration of NaCl solution.

이 연구에서는 화학액으로서 해안가에서 쉽게 영향 받는 염분을 사용하였다. 염분 용액으로 포화된 모래 벤토나이트 혼합토를 사용하여 압밀 비배수 삼축압축 시험을 실시하였다. 변형과 강도정수를 삼축압축시험을 통하여 구속응력과 염수의 농도 변화에 따라 구하였다. 실험 결과 영수로 포화된 흙과 벤토나이트의 점착력은 염수의 농도가 증가함에 따라 증가하며 내부마찰각은 변화가 없고 탄성계수는 증가하는 것으로 나타났다.

Keywords

References

  1. The Measurement of soil Properties in the Triaxial Test,2nd Ed. Bishop,A.W.;Henkel,D.J.
  2. Geoechnique v.4 Residual Strength of Kaolin and bentonite:The Influence of Their Consiteuent Pore Fluid Di Maio,;C.fenelli,G.B.
  3. ASTM STP 977 Triaxialpermeability and Strength Testing of Contaminated Soils Evans,J.C.;Fang,H.Y.(ed.)R.T.Donghe;(ed.)R.C.;(ed.)M.L.silver
  4. Canadian Geotechnial Journal v.29 no.3 Hydraulic Conductivity of Compated Bentonite-sand Mixtures Kenney;(et al.)
  5. ASCE Research Conference on Shear Strength of Cohesive Soils,Boulder A Mechanic Picture of shear Strength in Clays Lambe,T.W.
  6. Proceeding, 5th International Conference on Soil Mehanics and Foundation Engineering v.1 The Mechnaical properties of Montmorillonite and Illitic Clays Related to the Electrolytes of the pore Water Moun,J.;Rosenquist,I.
  7. Clay Miner v.38 no.6 Influence of calcium and Sodium concentration on the Microstructure of Bentonite and Kaolin Stawinski,J.;Wieraachos,J.;GarciaGonzalez,M.T.
  8. Proceedings of the Specialty Session on Geotechnical Engineering and Environmental Control Effect of Leaching on Undrained on Shear Strength Behavior of a Sedimented Clay Woo,S,M.;Moh,Z.C.