The Performance of Recycled Asphalt Materials II

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 of recycled asphalt materials performance of 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 viscosity, dynamic shear modulus, phase angle, bending creep stiffness. The characteristics were compared of different aging degree recycled asphalt and origin asphalt. The performances of recycled asphalt are rise of dynamic shear modulus and bending creep stiffness and viscosity, reduce of phase angle compared to virgin asphalt. Decreased value and increased value is minimal so that recycled asphalt materials will not make asphalt ageing for considering equipment and human inevitable errors in the process of recycled asphalt.