Effect of using Fibre on the Durability of Asphalt Pavement
Abstract: Using the fibre
additives with a uniform distribution in asphaltic concrete mixture is a
well-known technique for improving the mechanical properties and durability of
asphalt pavement. The purpose of this study is to investigate the effect of
preparing fibre and production of the properties of bitumen and asphalt
concrete mixture. In this study, a dense-graded aggregation, mineral fibres
(asbestos) and synthetic fibres (polyester and nylon) were used. Laboratory studies were done by comparing
different rheological properties, mechanical and moisture susceptibility of
mixtures of fibres. Results of the penetration and softening point on mixtures
of bitumen – fibre show that fibres improve the mixed rheological properties
and stiffening effect of fibre properties. The results of Marshall Tests
indicate that adding fibres reduces the strength in Marshall and results in the
slight increase in the percentage of optimum bitumen content and asphalt
percentage of air voids in comparison with typical fibre. The results of the
indirect tensile tests showed that the addition of fibres, depending on the
percentage of fibres significantly improves the durability of the mixture.
Author: Ali Akbari Motlagh,
Ebrahim Mirzaei
Journal Code: jptsipilgg160011