An investigation on the effects of polyester and polyacrylic fibers on the permanent deformation and moisture damage properties of asphalt concrete

Stripping and permanent deformation are two major modes of distress in asphaltic pavements. One of the measures to control these distresses is using additives, and, a variety of additives has been studied. In this research, the effect of two types of fiber on the moisture damage and permanent deformation properties of asphaltic concrete has been investigated. 38 mm long Polyester and 120 mm long polyacrylic fibers in different contents have been added to a typical asphaltic concrete and the permanent deformation behavior has been investigated by creep tests, and the moisture damage has been investigated by indirect tensile test in dry and saturated conditions. The results show that the fibers improve the permanent deformation behavior of asphalt concrete. However, while the polyester fibers improve the moisture damage property of the mixture, the polyacrylic fibers decreases the ratio of the saturated to dry indirect tensile strength of the mixture.