The effect of fiber in asphalt mixtures has attracted general concern. For study of this problem

four kinds of fibers are chosen in this test. Asphalt and modified asphalt are adopted in asphalt mixtures AC-16I. The road performance influenced by additional fiber was analyzed impersonally

i

e. the stability of asphalt concrete under high temperature condition

anti-crack ability under low temperature condition

the water resistance and fatigue performance. It was shown through the research that the optimum asphalt content

air void rate

clearance rate of the mineral powder

saturation degree

and the flow value were increased and the density was decreased after adding the fiber. The road performance

such as the stability of asphalt concrete under high temperature condition

anti-crack ability under low temperature condition

water resistance and fatigue performance

was obviously improved

and the high temperature stability and fatigue performance improved most evidently. The fiber asphalt mixture performance reached and even exceeded the modified asphalt mixture performance. The modified asphalt performance after adding fiber would be improved more greatly.