ASTM D6637 PDF

More D This test method shall be used for quality control and acceptance testing of commercial shipments of geogrids. Competent statistical assistance is recommended for the investigation of bias. As a minimum, the two parties should take a group of test specimens which are as homogeneous as possible and which are from a lot of material of the type in question.

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Current edition approved Feb. Published May No further reproductions authorized. D 3. Tensile strength of geogrids is the characteristic of a sample as distinct from a specimen and is expressed in force per unit width. Summary of Test Method 4. The tensile force required to fail rupture the specimen is recorded. The ultimate single rib tensile strength N or lbf is then determined based on the average of six single rib tensile tests.

This test method shall be used for quality control and acceptance testing of commercial shipments of geogrids. Competent statistical assis- tance is recommended for the investigation of bias. As a minimum, the two parties should take a group of test speci- mens which are as homogeneous as possible and which are from a lot of material of the type in question.

The test specimens should then be randomly assigned in equal numbers to each laboratory for testing. If a bias is found, either its cause must be found and corrected or the purchaser and supplier must agree to interpret future test results in light of the known bias.

Special adapta- tions may be necessary with strong geogrids, multiple layered geogrids, or geogrids that tend to slip in the clamps or those which tend to be damaged by the clamps. Apparatus 6. For a given product, the same clamps shall be used in testing methods A, B, and C prior to making any comparison between results. The machine shall be equipped with a device for recording the tensile force and the amount of separation of the grips. Both of these measuring systems shall be accurate to 6 1.

The rate of separation shall be uniform and capable of adjustment within the range of the test.

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ASTM D6637

Najar Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. We offer machines, apparatus, testers, tensile grips, test fixtures, clamps, holders, jigs, faces, jaws, extensometers, environmental and humidity chambers, furnaces, baths and custom solutions for unique applications. Work Item s — proposed revisions of this standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other.

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