Volume 40, Issue 5 (September 2012)
Properties of Asphalt Mixtures Containing Various Fibers
The effects of fiber modifiers on the performance of asphalt mixtures were investigated. Cellulose fiber, polyester fiber, and basalt mineral fiber were adopted as modifiers, and the dynamic modulus test, indirect tension fatigue test, and wheel track test were conducted in order to study the properties of asphalt mixtures containing various fibers. The test results indicate that the viscoelastic property of asphalt mixtures can be improved by the addition of fiber modifiers, which resulted in an increase of the dynamic modulus and a reduction in the phase angle. Dynamic modulus master curves also confirmed that fiber addition caused a general increase in the dynamic modulus for all mixtures evaluated within the range of the loading frequency, especially at low frequencies. The fatigue property and rutting resistance of fiber modified asphalt mixtures could be enhanced significantly.