Test Method Title
Flexural Rigidity of Geogrids, Geotextiles and Related Products
Reference Number
D7748
Material
Geogrid
Test Property
bending length, flexural rigidity
Description of Test
At a specified rate, a specimen is slid along a table top parallel to its long dimension, until its leading edge projects from the edge. The overhang length is measured when the tip of the specimen is depressed under its own mass to the point where the line joining the top to the edge of the platform makes a 0.724 radians (41.5°) angle with the horizontal. From the measured length both bending length and flexural rigidity are calculated.
Number of Test Specimens
5 machine direction 5 cross machine direction
Test Specimen Size
minimum 2" x 36" (geogrids) but must include 2 geogrid apertures in width
Keywords
bending length; flexural rigidity; stiffness