A Study on Marshall Properties of Hot Mix Reclaimed Asphalt Pavement

Abstract

In this research work, we mainly focused on the use of waste construction materials (Reclaimed Asphalt Pavement-RAP) for the construction of new surface course of flexible pavement. Here we adopt Marshall Mix design method for the analysis of waste construction material (Reclaimed Asphalt Pavement-RAP). Reclaimed Asphalt Pavement (RAP) is any removed or reprocessed pavement material that contains aggregates and bitumen. Recycling pavement provides an even greater economy by eliminating the cost associated with the removal and hauling of waste materials. Altogether 18 samples for fresh mix design and 33 samples containing different percentage of RAP mix design with or without Rejuvenating Agent (RA) were prepared for the calculation of OBC at fresh mix and Marshall Properties of mix containing different percentage of RAP. Here we used OBC of fresh mix design for the analysis of Marshall Properties of mix containing different percentage of RAP. Seven different percentage of RAP (15%, 20%, 25%, 30%, 50%, 75% and 100%) were mixed with the new graded aggregate for job mix. Rejuvenating Agent is added at job mix design containing higher percentage of RAP (30%, 50%, 75% and 100%). Higher stability is found in the mix design containing 50% of RAP (13.724 KN) without addition of RA. With the addition of RA, stability of varying RAP contain mix design seems to be slightly decreased and increase in flow value. Mix design containing up to 30% RAP with or without RA satisfies Marshall Properties as per SSRBW, 2073. So we can recommend the use of up to 30% RAP for the construction of new surface course of flexible pavement.