Project Summary
Paving fabrics have been used in asphalt concrete (AC) overlays in a variety of design and construction situations for more than three decades, and there is continued interest in effectively applying newfound technology to all-too-common pavement problems. The purpose of this study is to explore the application of a new multi axial grid, PGM-G4 composite interlayer invented by TenCate Geosynthetics in reinforcing AC pavement structures. Compared with conventional biaxial grids, this new type of paving interlayer grid introduces multi axial grid structure. It is expected that this unique feature will deliver optimal AC/geogrid interaction and more efficient reinforcement. In this study, the expected performance and added value of PGM-G4 as an interlayer will be verified. The engineering properties (such as fatigue and low temperature performance) of PGM-G4 interlayer-reinforced asphalt pavement structure will be investigated in the lab, and its impact on the overall asphalt pavement performance will be evaluated in the field as well. The results will provide performance data of new PGM-G4 composite paving grid in AC overlay reinforcement, which will be used to determine its suitability for Alaska paving conditions.
