A new ASTM test method will support geogrids, which are a geosynthetic formed of a regular network of integrally connected elements with openings, referred to as apertures, that ensure strong and resilient roads by stabilizing surrounding soil and rock. The test described in the standard (D7864/D7864M, Test Method for Determining the Aperture Stability Modulus of Geogrids) will help ensure that geogrids meet product specific calibrated and validated levels of aperture stability.
Already, this test method is popular in the geosynthetics industry, helping to measure in-plane rotation.
The test method was developed for subgrade stabilization calibrated design methods that require the input of aperture stability modulus.
CONTACT Technical Information: Mark H. Wayne, Ph.D., P.E., Tensar International Corp. • Alpharetta, Ga. • tel +1.770.344.2164 | ASTM Staff: Katerina Koperna • Phone: +1.610.832.9728 | Upcoming Meeting: Dec. 2-4 • Bombay Textile Research Association • Mumbai, India