Effect of rubber bitumen interaction o the properties of dry mixed rubberized asphalt mixture

TL;DRAbstract

The use of recycled scrap tires in asphalt mixtures is not a recent development with reclaimed tire crumb being used in the asphalt industry for over 40 years. Reclaimed tire crumb can be incorporated into asphalt mixtures using two different methods, referred to as the wet and dry processes. This study investigates the effect of rubber-bitumen interaction on the properties of rubberized asphalt mixture using dry process. The rubber-bitumen interaction is a significant issue in dry process even though this interaction is neglected in most of the previous studies. The =rubber swelling‘ activity occurs within the compacted asphalt mixture as a result of the bitumen absorption by the rubber particles that could result in inconsistent density of the compacted asphalt mixture, thus, affecting its performance. First, the effect of using different rubber gradation, bitumen content, and curing time on the interaction between rubber and bitumen or in other words the degree of bitumen absorption

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