: ABSTRACT

The term of mechanical properties of asphalt mixture by using of proper additives has been searched in recent decade by foreigner engineers. In this article, the technique of using of polyester fibers with high strength in making the asphalt samples and the Marshall test for studying the stability (technical features) of asphalt mixture used and assessed. The results indicate that in the samples in lower percent amounts of fibers, strength is increased while with increasing of the presence percent of fibers in mixture, strength is reduced. Also with increasing of fibers percent, fluidity, total void volume of mixture (VTM), void volume of aggregates (VMA) are increased ascending and on the other hand, special weight and the volume of space filled with bitumen (VFA) of mixture containing fibers with high strength were reduced by increasing of fibers presence. On the other hand, the cost of adding this kind of fibers to the asphalt mixture was estimated 10 percent of asphalt production cost that this amount of cost with regard to the positive effect of additives on asphalt seems proper. By studying and analyzing the diagrams, optimum percent of polyester fibers with high strength in this research was obtained %0.5 which has the best effect on asphalt mixture. By studying the obtained results, it was concluded that asphalt mixture strengthened with polyester fibers with high strength has been more flexible mixture than the base mixture and it can be used in the regions with moderate weather and not so much traffic.

 : More In

Technical-Economic Studies about Polyester Fibers with High Strength on Asphalt Mixtures with Solid Granulation