1.1 These test methods cover the determination of small-strain tensile properties of geogrids and geotextiles by subjecting wide-width specimens to cyclic tensile loading. 1.2 This test method allows for the determination of small-strain cyclic tensile modulus by the measurement of cyclic tensile load and elongation. 1.3 This test method is intended to provide properties for design. The test method was specifically developed to provide a measure of modulus for use in mechanistic-empirical pavement design. The use of cyclic modulus from this test method for other design procedures should be evaluated on a case-by-case basis. 1.4 Three procedures (Methods A, B, and C) are provided to determine small-strain cyclic tensile modulus on geogrids and geotextiles. 1.4.1 Method A--Testing a relatively wide specimen of goegrid in cyclic tension (kN/m or lbf/ft). 1.4.2 Method B--Testing multiple layers of a relatively wide specimen of geogrid in cyclic tension (kN/m or lbf/ft). 1.4.3 Method C--Testing a relatively wide specimen of geotextile in cyclic tension (kN/m or lbf/ft). 1.5 The values stated in SI units are to regarded as the standard. The values in parentheses are for information only. 1.6 This standard may involve hazardous materials, operations, and equipment. This standard does not purport to address all of the safety concerns, if any, associated with its use. 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.
geogrid; geogrid rib; geosynthetic; geotextile; index test; tensile test
The parameters determined using these test methods will be used in highway design.
The title and scope are in draft form and are under development within this