STP1142: Hydraulic Conductivity of Compacted Clayey Soils Under Distortion or Elongation Conditions

    Cheng, S-C
    Asst. Professor, Drexel Univ., Phila., PA

    Larralde, JL
    Asst. Professor, Drexel Univ., Phila., PA

    Martin, JP
    Assoc. Professor, Drexel Univ., Phila., PA

    Pages: 18    Published: Jan 1994


    Abstract

    Models of fine-grained landfill cap response to differential subsidence are discussed, and experimental results are presented. Soils used include a clayey silt, a silty fine sand, and the latter with admixed kaolinite. Tests were conducted on statically compacted soils in a permeameter that induced axisymmetric distortion. Hydraulic conductivity increased with the increase in flexural stresses. Sensitivity to plasticity and compaction moisture content was observed. Tests were also conducted to obtain mechanical properties, including tensile strength (split-cylinder), unconfined compressive strength, modulus of rupture (beam flexural strength), and several deformation moduli. The results are normalized in terms of compaction moisture relative to optimum moisture content.

    Keywords:

    Hydraulic Conductivity, Landfill Cap, Subsidence, Distortion, Flexure, Tension, Plasticity, Compaction


    Paper ID: STP23892S

    Committee/Subcommittee: D18.04

    DOI: 10.1520/STP23892S


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