Resilient modulus of hot-mix recycled asphalt pavement with waste from engine oil and vehicle tires

Abstract

Recycled Asphalt Pavement (RAP) using old aggregate asphalt mixture is manufactured by adding asphalt content and aggregates that have been lost due to fatigue or the aging process. In addition to reducing the amount of waste, the recycling process saves road maintenance costs. In the present study, recycled rubber powder, Crumb Rubber (CR), from vehicle tires is employed to improve the performance of RAP. The type of asphalt used in the study is natural asphalt from Buton Island, which is subjected to an asphalt refining process termed Refine Buton Asphalt. CR with different contents of 0.5%, 1%, 1.5%, 2%, and 4% were added to the aggregate, and subsequently mixed with asphalt through a hot mixture process. These variations in CR content corresponded to 0% and 1% additions to the RAP mixture, while the addition of waste-engine oil was determined by a penetration test. The resilient modulus of hot asphalt mixture was tested using Universal Material Testing Apparatus (UMATTA) at various temperatures. The results of the study indicate that the addition of CR increases the stability and resilient modulus of RAP.