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<br />Ozone Resistance It is primarily a test for rubber deterioration and is based on a <br />qualitative assessment of surface cracking of the material after <br />exposure. <br />Puncture Resistance Extent to which a material is able to withstand the action of a sharp <br />object without perforation. Examples of [est of the property are <br />Federal Test Method Standard No. l01 B, methods 203 l or 2065. <br />Seam Peel Strength A representative specimen is taken across the seam and placed in a <br />tensile testing machine. For the peel test, one end and the closest end <br />of the adjacent piece are gripped, placing the joined or seamed <br />portion in shear. The resistance to peel is measured. <br />Seam Shear Strength A representative specimen is taken across the seam and placed in a <br />tensile testing machine. For the shear test, the nvo separate pieces <br />of geomembrane are pulled apart, placing the joined or seamed <br />portion in shear. The resistance to shear is measured. <br />Tzar Strength The maximum force required to tear a specified specimen, the force <br />acting substantially parallel to the major axis of the test specimen. <br />hfeasured in both initiated an uninitiated models. Obtained value is <br />dependant on specimen geometry, rate of extension, and type of <br />fabric reinforcement. Values are reported in stress, e.g., pounds, or <br />stress per unit of thickness, e.g., pounds per inch. <br />Tensile Strength The maximum tensile stress per unit of original cross sectional area <br />applied during stretching of a specimen to break; units: S[-Mega or <br />kilopascal, customary: pound per square inch. <br />Thermal Stability The ability of fibers and yarns to resist degradation at extreme <br />temperatures. <br />Thickness The normal distance behveen [wo surfaces of a geosynthetic. Note: <br />Thickness is usually determined as the distance between an anvil, or <br />base, and a presser foot used to apply a specified compressive stress. <br />Transmissivity For a geotextile, the volumetric Flow rate per unit thickness under <br />laminar flow conditions, in the in-plane direction of the fabric. <br />Water Absorption The increase in weight of a test specimen after immersion in water <br />under specified conditions of time and temperature, expressed as a <br />percentage of it dry weight. <br />Water Vapor Water vapor flow normal to nvo parallel surfaces of a material, <br />Transmission through a unit area, under the conditions of a specified test such as <br />ASTbt E 96. <br />39 <br />