Adaptation of Superpave Asphalt Concrete Mix Design Procedure to Jordan Climatic and Traffic Conditions

Ibrahim M. Asi ； Yahia Khalayleh

《International Journal of Pavement Research and Technology》 4卷3期 (2011/05) Pp. 154-161

https://doi.org/10.6135/ijprt.org.tw/2011.4(3).154

並列摘要

Highways in Jordan are typically designed and constructed to last at least 20 years. However, it is not uncommon to see flushing, rutting, and cracking in asphalt pavements well before that period, especially in areas exposed to harsh environmental conditions and heavy traffic loadings. The Superpave (Superior Performance Pavements) system was developed to give highway engineers the tools they need to design asphalt pavements that will perform better under temperature extremes and heavy traffic loads. This research was established to study the possibility of adopting the Superpave mix design procedure in Jordan using prevailing traffic and environmental conditions. In this study, a map showing the different temperature zones available in Jordan was developed. A comparison study was carried out utilizing local materials to design asphalt mixes using both Marshall and Superpave mix design procedures. It was found that the Superpave mix design procedure recommended, for the local environmental and loading conditions, lower asphalt content than that predicted by Marshall mix design procedure. In addition, it was found that using the presently recommended local aggregate gradation for heavy traffic in the Superpave design method gave dust proportion higher than the maximum specified limit by the Superpave procedure. High dust proportion will usually lead to brittleness of the mixes. Therefore, shifting to the Superpave design procedure might help in solving the bleeding problem and some of the distresses common in the local asphalt structures.

並列關鍵字

Marshall ； Performance grading ； Superpave ； Temperature zoning