Authors:
Ratna Yuniarti;
Abstract:
Porous asphalt is an open graded mixture characterized by a very high air void content to provide high permeability in order to prevent aquaplaning. However, due to their high porosity, aggregates can be stripped easily from asphalt mixes. Applying asphalt modifier is expected to overcome this problem by increasing the binding of aggregate particles. This study aims to evaluate the resistance to degradation of porous asphalt mixture using crude pine resin from pine tree (Pinus merkusii) and gum rosin as modifier. In this study,
specimens were prepared with different percentages of crude pine resin and asphalt content. The durability of porous asphalt mixture was assessed by Cantabro abrasion test on unaged and aged specimens. The
susceptibility of the mixture to withstand disintegration against permanent contact with water is also included. It was found that the use of 2%-4% pine resin by weight of asphalt binder in porous asphalt mixture provides a better resistance to degradation after a heating period of 7 days at 60°C compared to the mixture containing
asphalt 60/70. Results from this study show that the specimen formulated with 3% pine resin was the most effective one at increasing resistance to water damage. Therefore, pine resin as asphalt modifier has a great potential to improve the lifetime of porous asphalt mixture.
Keywords:
Pine resin, Asphalt modifier, Open graded mixture, Degradation, Water damage, Cantabro abrasion test