THE INFLUENCE OF THE DIELECTRIC CONSTANT AND ELECTROLYTE CONCENTRATION OF THE PORE FLUIDS ON THE UNDRAINED SHEAR STRENGTH OF SMECTITE

SOILS AND FOUNDATIONS

HELGE STANJEK¹  RAFIG AZZAM¹  GIOVANNI SPAGNOLI¹  TOMÁS FERNÁNDEZ-STEEGER¹  MARTIN FEINENDEGEN¹ 

[1] RWTH Aachen University, Department of Engineering Geology and Hydrogeology

关键词: dielectric constant;    diffuse double layer;    electrolyte concentration;    liquid limit;    plasticity index;    pore fluids;    smectite;    undrained shear strength;    (IGC: B10/D2/D6);   

DOI  :  10.3208/sandf.50.757

学科分类：建筑学

来源: Japanese Geotechnical Society / Jiban Kogakkai

【 摘 要 】

References(30)It is common knowledge that the engineering properties of clays are greatly influenced by the type of pore fluids. However, the impact of the pore fluids on the geotechnical properties of the samples is even more dependent on the type of mineral and interlayer ions. Completely different behaviours could be observed with identical pore fluids but different clay minerals and vice versa. The liquid limit, plastic limit and undrained shear strength were determined for two types of smectites with different interlayer cations, namely Ca and Na-smectite. The pore fluids were varied by using different dielectric constants (ε) and electrolyte concentrations (n0). The results show that the two kinds of soils respond in a similar way but with a different magnitude depending on the ion occupation.

【 授权许可】

Unknown