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  • Use of the pressure leachate control test for selection of multi-barrier disposal systems
    Kortnik, Jože
    Compacted clays soils are commonly used as hydraulic barriers in waste containment systems such as in liners and covers for landfills, impoundments, reservoirs and pounds. Compacted clays can ... minimize infiltration of fluid into waste or control the release of contaminated fluids to the surroundings soils and groundwater. The hydraulic properties of these soil-based structures can be adversely affected by desiccations cracking. The presente of cracks in the soil matrix increases significantly the soil hydraulic conductivity the soil hydraulic conductivity while decreasing the strength of the soil. Previous studies evaluated the use of soil additives (such as lime, cement, and sand) as a crack reducing mechanism. Initila results indicated that soil shrinkage was reduced. However in many cases the additives resulted in an increased hydraulic conductivity and decrease in soil plasticity. As a result ther is an increasing interest in the use of fiber reinforcement, which has shown successful results in concrete and other material applications. The present investigation studied the potential for fiber reinforcement to decrease a soils crack potential while also improving the hydraulic performance of the clay material. Results of the study provide information on the use of polypropylene fibers mixed with clay soils of varying plasticites. The percent of fiber is varied and the test results are analyzed to search for the mix proportions that lead to an optimal soil-fiber mix. The optimal soil mix is selected for additional testing to provide information on the cracking properties of natural clay soil liners versus the clay liners reinforced whith the optimal proportion of fibres.
    Vir: Zbornik referatov = Book of proceedings (2000, Str. 148)
    Vrsta gradiva - prispevek na konferenci ; neleposlovje za odrasle
    Leto - 2000
    Jezik - angleški
    COBISS.SI-ID - 250975

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