Influence of geogrid on the road performance of sand-grained asphalt mixture
To study the influence of geogrids on the performance of sand-grained asphalt mixture for pavement,four types of geogrids,including carbon fiber geogrid,glass fiber geogrid,stitched glass fiber geogrid,and polypropylene geogrid,are used to reinforce the sand-asphalt mixture.Tests are conducted on the asphalt mixture for crack propagation,three-point bending,high-temperature rutting,and four-point bending fatigue.The road performance of the sand-asphalt mixture before and after laying geogrids is analyzed.The results show that incorporating glass fiber geogrid and stitched glass fiber geogrid significantly improves the tensile,flexural,rutting,and fatigue resistance of the asphalt mixture.The carbon fiber geogrid performs best in enhancing tensile,flexural,and rut resistance,but is the weakest in improving fatigue performance.The improvement effect of polypropylene geogrid is not as significant as the other three types of geogrids.
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