Assessment the performance of asphalt mixtures modified with waste tire rubber at high temperatures

Abstract

Quality of roads pavement can consider as one of the essential criteria for the good transportation system. So, to reduce the problems of fatigue crack and rutting of roads, several actions have been taken including the improving of pavement quality and the structure design methods. The increasing in the attention of traffic engineers in the last few years to modify and improve the asphalt performance through providing a different type of additives and replace the raw materials of asphalt mixture with recycled materials, in order to improve the environmental as well as reduce the cost of modified pavement mixture. There were several types of research investigated the validity of using the waste material products in the mixtures of asphalt pavements, since these replacement materials could improve the performance of roads pavement, the researches that adopted the influence of usage recycle waste materials to improve performance of the asphalt of the road still limited compared with other construction fields. This paper briefly discussed the modified asphalt mixtures performance and the most used recycled material which is crumbs rubber used as modifier in the HMA. By using various proportions of crumbs rubber (2.5, 5, 7.5, 10, 15 and 20% by weight of asphalt), and investigate the effect of adding rubber crumbs waste on the most important dynamic and mechanical properties of asphalt mixtures, which is the rutting resistance. It aims also to understand the benefits and disadvantages of using recycled tire rubber and develop the idea on good inclusion of waste material in the road pavements.