Effect of HDPE Based Wastes on the Performance of AC-WC Mixture with RAP as coarse aggregate substitute

Abstract

One attempt to avoid early pavement damage is to enhance asphalt quality as an aggregate binder. The addition of polymeric materials is frequently used to improve asphalt quality, particularly asphalt rigidity. Increased rigidity will enhance pavement performance against rutting, bleeding, and swelling, particularly in summer with a relatively elevated temperature. This study uses High Density Polyethylene (HDPE) polymer waste as a modifier in a mixture of Asphalt Concrete-Wearing Course (AC-WC) which also utilizes RAP waste as a coarse aggregate substitute. The aim of this study is to analyse the to analyse effect of waste materials on the AC-WC performance. Analysis was carried out after the Marshall test to obtain the values of air void, Void in Mineral Aggregate (VMA), Void Filled with Asphalt (VFA) stability, flow and Marshall Quotient (MQ). Marshall samples prepared with dry method modified HDPE asphalt binder, given a limit on the specifications of the number of each specimen. The percentage of HDPE as asphalt mixture is 0%, 1.6%, 1.8%, 2.0%, 2.2%, and 2.4% asphalt weight. The optimum asphalt level (KAO) used is 5.25%. Marshall test shows that the addition of 1.6% of HDPE in the AC-WC mixture and RAP can increase mixture stability by 1.74% and flow by 3.69%.

Effects of HDPE Utilization and Addition of Wetfix-Be to Asphalt Pavement in Tropical Climates

“…Concrete asphalt mixture (AC-WC) is one of the surface layers on the construction of highway flexural pavement consisting of asphalt, gravel, sand, and ash stones. According to Mahardi et al [28], asphalt serves as a binding material to unite aggregate fractions but is expected to remove the air cavity as recommended by specifications. Split aggregates play a significant role in determining the carrying capacity of the AC-WC mix.…”