Due to the very large number of tests offered, descriptions of those most commonly requested have been gathered into the following groups:

ASTM D4632 – Grab Breaking Load and Elongation of Geotextiles

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ASTM D4632 covers the determination of breaking load (grab strength) and elongation (grab elongation) of geotextiles using the grab method.

The grab method is a modified tensile test in which the specimen is pulled in tension at a constant crosshead rate and continues until specimen rupture. The specimen size is 4 inches wide by 8 inches long. Edge effects are eliminated by clamping the specimen with 1 inch wide by 2 inch long clamps, therefore leaving the specimen unclamped on the edges.

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References: ASTM D4632 – Standard Test Method for Grab Breaking Load and Elongation of Geotextiles