STP1190: A Review of the Degradation of Geosynthetic Reinforcing Materials and Various Polymer Stabilization Methods

    Hsuan, YG
    Assistant Professor, Director and Professor, Geosynthetic Research Institute, Drexel University, Philadelphia, PA

    Koerner, RM
    Assistant Professor, Director and Professor, Geosynthetic Research Institute, Drexel University, Philadelphia, PA

    Lord, AE
    Assistant Professor, Director and Professor, Geosynthetic Research Institute, Drexel University, Philadelphia, PA

    Pages: 16    Published: Jan 1993


    Abstract

    The paper describes the two major degradation mechanisms of geosynthetics: oxidation of polyolefins (polyethylene and polypropylene), and hydrolysis of polyester (polyethylene terephthalate). These are the polymers which comprise the vast majority of geotextiles and geogrids used for soil reinforcement. Details of the degradation mechanisms of each material and their consequences are described based on the presently available literature. The influence of material structure, in particular the orientation, and ambient environmental conditions on the degradation are also discussed. The mechanisms and methods of stabilization which are currently used to minimize degradation are also presented. Finally, the paper concentrates on various possible test methods which can be used for monitoring the degradation of geosynthetic materials.

    Keywords:

    degradation, oxidation, hydrolysis, polyolefins, polyethylene, polypropylene, polyester, polyethylene terephthalate, free radical, geosynthetics


    Paper ID: STP24325S

    Committee/Subcommittee: D35.96

    DOI: 10.1520/STP24325S


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