Marshall properties and rutting resistance of hot mix asphalt with variable reclaimed asphalt pavement (RAP) content

• Main Authors: Abd Karim, Z (Author), Abd Rahman, Z (Author), Arshad, AK (Author), Hashim, W (Author), Shaffie, E (Author)
• Format: Article
• Language: English
• Published: 2017
• Online Access: View Fulltext in Publisher
• DOI: 10.1088/1757-899X/271/1/012078

Hot mix recycling is the process in which reclaimed asphalt pavement (RAP) materials are combined with new materials to produce hot mix asphalt mixtures. This paper details a laboratory study in which the effects of different RAP contents were evaluated on the performance of hot recycled mixes. The objective of this study is to evaluate the rutting resistance of asphalt mixes containing different percentages of RAP. The Marshall mix design method was adopted in this study to determine the OBC for the asphalt mixes containing four aggregate combinations with RAP contents of 0% (control), 15%, 25% and 35%. Volumetric analysis was performed to ensure that the result is compliance with specification requirements. The resilient modulus test was performed to measure the stiffness of the mixes while the Hamburg wheel tracking test was used to evaluate the rutting performance of these mixes. The results obtained showed that there were no substantial differences in volumetric properties, stability values and stiffness properties between the control mix and recycle mixes. It can be concluded that recycled mixes performed as good as the performance of conventional Hot Mix Asphalt (HMA) in terms of resilient modulus and rutting.