"Evaluation Of Reclaimed Asphalt Pavement As Hot Mix Asphalt"

"The increase in traffic and maintenance of roads demand the urgent need for building better, long-lasting, low cost, and more efficient roads. The use of waste materials in road construction has proven to be an effective alternative in reducing cost and shows the same workability as of the conventional bituminous mixes. In this study, reclaimed asphalt pavement is used to formulate a new design mix to evaluate the suitability of reclaimed asphalt pavement when used as hot mix asphalt pavement. The significance of this project is to optimize the use of waste materials such as reclaimed asphalt pavement which is in line with the present ad future trends to deplete or recycle waste materials. The reclaimed asphalt pavement samples were subjected to different mixing and compaction temperatures. Si was subjected to temperatures ranging from 155-160°C. S2 was subjected to 160-165°C. S3 was subjected to temperatures ranging from 165-170°C. There were three hot mix asphalt (HMA) samples per specified compaction temperature of 130°C, 140°C, 150°C. The samples were investigated by its stability, flow value and bulk specific gravity using the Marshall Stability Test. It was concluded that the sample compacted at 150°C and mixed between the temperatures of 160-165°C is showing potential because of its high stability. Using reclaimed asphalt pavement increased the stability of the mix because of the chemical properties present in the material. Using reclaimed asphalt pavement alone is unstable since the sample showed low bulk specific gravity caused by air voids which made the sample unstable and the flow values exceed the specification limit."