Alternative Approach to Improve Road Base Quality

Abstract

A flexible pavement system basically consists of an asphalt surface layer, a base course, sub base and the sub grade. The base course which is in between the surface layer and the sub grade plays a very prominent role in transferring the loads coming on to the surface layer to the natural soil sub grade. Thus, base courses in flexible pavements help to distribute the traffic load. The main objective of this study is to identify alternative approach to improve road base quality by hot asphalt treated base (HATB) through conducting marshal tests. The research reviewed previous studies related to Asphalt Treated Base (ATB) course materials, resilient modulus and tensile strength and Laboratory Investigation. Weak aggregate(less durable and weak in strength) and 60/70 bitumen grade asphalt binder was used at three different percent. The method of study consists of problem identification, literature review; and laboratory investigation, analysis and conclusion. The Finding of the investigation have shown that treated aggregate has three times durable and two times stronger than the normal aggregate so that we can achieve strong and durable road base with the minimum depth.