الفهرس | Only 14 pages are availabe for public view |
Abstract One of the main reasons of structural failure of pavement layers in hot climate countries, among which is Egypt. are creep and rutting. Creep is a form of a plastic movement in the pavement surface, while rutting is channalized depression develops under the wheel tracks of asphalt pavement layers. These sons of plastic deformations are referred primarily to the loss of the cohesive effect of asphaltic cement as it becomes more and more viscous under the effect of temperature. Many new pavement technologies had been introduced in an attempt to improve the resistance to these types of pavement deformations. Among these technologies is the use of mixes in which the contribution of asphalt cement cohesion in the mix strength is lowered while interlocking and friction between the aggregate particles arc given the important role in the mix strcngth. One of these mixes is the Stone Matrix Asphalt (SMA). Stone Matrix Asphalt has been used successfully as a surface-wearing course in Europe for the last twenty years, and with promising success in USA (3). Besides being resistant to permanent deformation, SMA shows potential for improving long term performance and durability. The success of SMA abroad had encouraged researchers to study the potential of its use in Egypt. However this methodology needs to be evaluated using local materials in Egypt to ensure satisfactory performance as proved abroad. |