Comparative analysis on practical implications and evaluation of PVC geomembrane interfaces against particulate materials

Authors : Tanay KARADEMİR

Pages : 14-21

View : 51 | Download : 12

Publication Date : 2018-12-01

Article Type : Research Paper

Abstract :An experimental research study including a series of laboratory large displacement interface shear tests between different particulate materials insert ignore into journalissuearticles values(rounded, angular sands); and smooth PVC geomembranes, and additionally, a series of Shore D Hardness measurements were conducted. The aim of this study is to investigate an easy and quick means of predicting shear resistance/strength of sand-polymer interfaces indirectly from the hardness of the continuum material insert ignore into journalissuearticles values(i.e. PVC geomembrane); at the interface to establish a comparative analysis between direct test results and indirect practical evaluation through hardness property based on an important interface shear property; friction angle, insert ignore into journalissuearticles values(δ); at peak and  residual states measured directly from interface shear tests performed in the laboratory as well as computed indirectly from empirical models developed in the study for the case of different normal loading conditions insert ignore into journalissuearticles values(i.e. normal stress levels:25, 100, 400 kPa);. The results and analysis will be presented throughout the paper demonstrate that the mobilized shear response and the resulting frictional resistance of sand insert ignore into journalissuearticles values(rounded, angular); – PVC geomembrane interface systems are highly dependent on a combination of loading conditions, geomembrane physical material properties insert ignore into journalissuearticles values(i.e. hardness); and particulate shape insert ignore into journalissuearticles values(i.e. angularity/roundness);. For direct and indirect assessment of the resultant [δ Peak ] and [δ Residual ] values, the comparative analysis showed that a reasonable similarity between the laboratory test results and the indirect analytical assessment analysis is evident from the analogicalness of the experimentally measured values at the predetermined normal stress levels insert ignore into journalissuearticles values(25, 100 and 400 kPa); to the computed values from the proposed empirical correlation equations proposed in the paper.
Keywords : Geosynthetic Layered Systems, Landfill Design, Particulate Materials, PVC Geomembranes

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