Effect of Recycled Concrete Aggregates (RCA) for Rutting Susceptibility in Flexible Pavement

Abstract

The construction produced a large volume of debris. This debris may be utilized as Recycled Aggregates (RAs), especially in the pavement. RCA is widely used across the globe; it not only reduces the burden on the environment but also on natural resources. The scope of this study is to utilize recycled concrete aggregates (RCA) for testing rutting susceptibility to hot mix asphalt (HMA). Physical and mechanical tests were performed to determine the behaviour of aggregates for natural and each level of RCA combined with natural aggregates. A typical binder was utilized and found qualified for use in HMA. Rutting susceptibility tests were performed on natural (controlled) and sample mixes with RCA (0–100%) at a 20% interval. It was observed that the optimum result for rutting potential was found to be at 20% of RCA. It was observed that an increase in RCA proportion results in an increase in asphalt content and, on the contrary, a decrease in rut resistance.