Abstract:Through the fiber modification of fiber asphalt, the road performance of concrete materials can be improved. In order to explore the road performance of OGFC-13 asphalt mixture under different volume ratios of various fibers, 4 kinds of asphalt mixtures as polyacrylonitrile fiber, polyester fiber, lignin fiber and basalt fiber are specially prepared for road performance test. The results show that: 1) The dynamic stability of OGFC-13 asphalt mixture increases with the increase of fiber contents, and when the fiber contents of various fibers exceed 0.3%, the dynamic stability shows a downward trend; 2) When the fiber volume content is 0.3%, the dynamic stability of the asphalt mixture containing basalt fiber is 3 252 times/mm, and the high temperature stability is the best; 3) When the content of polyester fiber and basalt fiber is 0.2%, the maximum tensile strain of asphalt mixture at low temperature is the same, which is 2 834, but the role of polyester fiber in the low temperature crack resistance of asphalt asphalt mixture is unstable; 4) The drainage performance of OGFC-13 asphalt mixture mixed with fiber material shows a downward trend, especially the wood fiber has the greatest influence on the permeability coefficient, when the content is 0.2%, the water permeability coefficient drops sharply from 1 154 mL/a to 635 mL/s, a decrease of 44.97%; 5) On the whole, the modification effect of basalt fiber in OGFC-13 asphalt mixture is the best, but its content volume fraction should be controlled within 0.3%. The results can provide a certain reference for the engineering application of warm mix asphalt with this layer covering.