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Influence of Recycled Concrete Aggregate (RCA) towards the performance of Hot-Mix Asphalt (HMA) mixture

(The World Academy of Research in Science and Engineering, 2020)

Significant use of Recycled Concrete Aggregate (RCA) has been applied by many countries especially in Hot-Mix Asphalt (HMA) as can possibly improve road construction in the economic and environmental aspects. However, in spite of such promising potentials, insufficient and inconclusive data to be referred based on previous study causes further study to be conducted as to focus more on the performance of aggregate in term of the impact and crushing value by using RCA. Also, to investigate the influence of different percentage 0%, 10%, 20%, 30% and 40% of RCA in the HMA mixture to the Marshall stability, flow value and water absorption. When the percentage of RCA content increase, the performance of all the parameters has become weaker and lowered. But then, RCA still can be used in the HMA as the differences in the performances with the natural aggregate is slightly small. Therefore, the optimum percentage of RCA got on this study is 30% by referred and discussed on all the five parameters. In conclusion, RCA is a great material that can be used to replace natural aggregate as it contributes great benefit in the environment aspect and also helps in the reduction of stockpiles of concrete wastes.