The Performance of Recycled Asphalt Materials I

Abstract

In the past few years, recycled asphalt materials have been used successfully in asphalt concrete pavement in China. However, there are no results of the performance of using abson method and vacuum rotating reclaim to recycled asphalt. The objective of this study is to investigation performance of recycled asphalt materials using abson method and vacuum rotating reclaim. Abson method and vacuum rotating reclaim were implemented to analyze the characteristics of different aging degree recycled asphalt in this article. Lanlian-70 asphalt put into pressure aging vessels after the time of 0 hour,5 hour,10 hour,15 hour, 20 hour of aging. Afterwards, the different aging degree asphalt was dissolved by trichloroethylene, and then asphalt solution reclaimed using abson method and vacuum rotating reclaim. In the end, the performances of recycled asphalt were tested, such as penetration, softening point, ductility. The characteristics were compared of different aging degree recycled asphalt and origin asphalt. Comparison results indicate that the indexes of recycled asphalt are decease of the penetration and ductility, increase of softening point. However, decreased value and increased value is minimal. Therefore, recycled asphalt will not make asphalt ageing in the process of recycled asphalt.