1.1 This test method covers the measurement of the low-strain (0%-2.5% strain)out-of-plane response of geogrids and geotextiles to a force that is applied perpendicular to the plane of the sample. 1.2 On the assumption that at low strain the sample deforms to the shape of an arc of a sphere formulations are provided to convert the test data to multi-axial tensile load-strain values.
At present there is no test method available to determine a common index value for the tensile performance of geogrids and geotextiles manufactured with different alignments of their constituent tensile elements, for example geogrids with two sets of tensile elements and square apertures and geogrids with three sets of tensile elements and triangular apertures. Index values of multi-axial load at a low strain (2%) will be used by government agencies and other specifiers in material specifications to aid free choice of material irrespective of the arrangement of its tensile elements.
The title and scope are in draft form and are under development within this ASTM Committee.
Citing ASTM Standards
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