This Malaysian Standards describes to be used to determine the strength of an individual geogrid junction, also called a node. The test is configured such that a single rib is pulled from its connection to a cross-rib to obtain the maximum force, or strength of the junction.
This standard proposes a test method for performing tension tests on geogrid junctions. The technique is such that clamps firmly grip the transverse ribs on each side of the junction. Then the longitudinal rib going through the junction is clamped at a distance from the junction and the system tensioned until junction (or rib) failure occurs. This forces a tension or shear force to occur within the junction in the direction of the applied load. The junction has no normal pressure on it, i.e., it is horizontally unconfined.
The value of junction strength can be used for manufacturing quality control, development of new products, or a general understanding of the in-isolation behavior of a particular geogrid’s junction.
