AASHTO R 50-09 (2018) PDF Download

The AASHTO R 50-09 (2018) standard provides guidance for pavement designers on the use of geosynthetics to reinforce the aggregate base course of flexible pavement structures. The purpose of geosynthetic reinforcement is to enhance the structural support of the pavement and increase its longevity under traffic loads.

The standard focuses specifically on base reinforcement, which involves incorporating a geosynthetic material within or directly beneath the granular base course. It emphasizes the use of geotextiles, geogrids, or geogrid/geotextile composites when considering geosynthetics.

It is worth noting that this standard was previously known as provisional standard PP 46, indicating that it has undergone revisions and updates over time to ensure it remains relevant and effective.