STP1076

    Thermal Analysis of Nonwoven Polyester Geotextiles

    Published: Jan 1990


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    Abstract

    Traditional methods of characterizing the durability of geotextiles often lack the precision and sensitivity needed in short-term aging tests. In an effort to differentiate between thermal and chemical effects, thermal analysis and physical property testing were used to study nonwoven, polyester geotextiles aged at ambient and elevated temperatures in controlled environments conducive to hydrolysis of polyester. Samples were exposed to deionized water, aqueous sodium hydroxide, and aqueous calcium hydroxide. Three thermal analytical techniques were used to characterize aged and unaged bulk samples of geotextiles: differential scanning calorimetry (DSC), thermal mechanical analysis (TMA), and dynamic mechanical analysis (DMA). In addition to assessing changes in various physical properties, solution viscosities were performed on aged and unaged samples. In general, of the three thermal analytical techniques used, DSC is the most promising method for bulk geotextile characterization.

    Keywords:

    geotextiles, geosynthetics, chemical degradation, alkaline hydrolysis, polyester, thermal analysis, differential scanning calorimetry, thermal mechanical analysis, dynamic mechanical analysis, physical properties


    Author Information:

    Thomas, RW
    Texas Research International, Inc., Environmental Sciences, Austin, TX

    Verschoor, KL
    Texas Research International, Inc., Environmental Sciences, Austin, TX


    Paper ID: STP23492S

    Committee/Subcommittee: D35.10

    DOI: 10.1520/STP23492S


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