The effect of geogrid aperture size, shape and rib depth were extensively researched at the University of Nottingham.
The Nottingham Transportation Engineering Centre (NTEC)
The Pavement Research Centre at the University of Nottingham was used to identify the design features required for improved performance and to help shape and define the TriAx geogrid.
The trafficking test facility at Nottingham was used to produce a large quantity of trafficking data across both TriAx and biaxial geogrids, confirming the much improved performance benefits of the TriAx geogrids compared with biaxial geogrids.