ASTM D6706-01 (R2021) pdf free download.Standard Test Method for Measuring Geosynthetic Pullout Resistance in Soil.
1 .1 Resistance of a geosynthetic to pullout from soil is determined using a laboratory pullout box.
1 .2 The test method is intended to he a performance test conducted as closely as possible to replicate design or as-built conditions. It can also he used to compare different geosynthetics. soil types, etc.. and thereby he used as a research and development test procedure.
1.3 The values stated in SI units are to be regarded as standard. The values stated in parentheses are provided for information only.
3. Terminology
3. 1 Definitions of Terms Specific to This Standard:
3.1.1 apertures. n—the open spaces in geogrids which enable soil interlocking to occur.
3. 1 .2 atmosphere for frsting geosvnthetics, ti—air maintained at a relative humidity of 60 ± 10 % and a temperature of 21 ± 2 °C (70 ± 4 °F).
3. 1 .3 cross-maclime direction, n—the direction in the plane of the geosynthetic perpendicular to the direction of manufacture.
3.1.4 failure, n—a defined point at which a material ceases to he functionally capable of its intended use.
3. 1 .5 geosvtithetic, n—a planar product manufactured from polymeric material used with soil, rock, earth, or other gcotechnical engineering related material as an integral part of a man-made project, structure, or system. (D4439)
3.1.6 junction, n—the point where geogrid ribs are interconnected in order to provide structure and dimensional stability.
3. 1.7 machine direction, n—the direction in the plane of the geosynthetic parallel to the direction of manufacture.
3. 1 .8 pullout, n—the movement of a geosynthetic over its entire embedded length, with initial pullout occurring when the back of the specimen moves, and ultimate pullout occurring when the movement is uniform OVCf the entire embedded length.
3.1.9 pullout force, (kN), n—force required to puii a geosynthetic out of the soil during a pullout test.
3. 1. 10 pullout resistance, (kN/m), n—the pullout force per width of geosynthetic measured at a specified condition of displacement.
3.1.11 rib, n—the continuous elements of a geogrid which are either in the machine or cross-machine direction as manufactured.
3.1.12 ultimate pullout resistance, (kN/m), n—the maximum pullout resistance measured during a pullout test.
3. 1 . 13 wire gauge, n—a displacement gauge consisting of a non-extensible wire attached to the geosynthetic and monitored by connection to a dial extensometer or electronic displacement transducer.ASTM D6706 pdf download.