The Analysis of Recovery Asphalt Performance in Recycled Asphalt Mixture

Abstract:

A laboratory study was carried to investigate the recycled asphalt performance of recycled asphalt mixture. The recycled asphalt mixture is from the Guaxing road in Gansu Province. By extraction tests and combustion method test on recycled asphalt mixture, the content of recovery asphalt, penetration, softening point and ductility were measured. The chemical composition testing and rheological testing were conducted on the recovery asphalt and new asphalt. Results indicate that the recovery asphalt contain the high proportion of asphaltenes and the low proportion of aromatics and resins. With temperature increasing, the decrease in the complex shear modulus (G*) of the recovery asphalt is much larger than that of the new asphalt,the increase in the phase angle of the recovery asphalt is much larger than that of the new asphalt, too. All these lead to the recovery asphalt harden, poor liquidity and plasticity.

• Periodical: Applied Mechanics and Materials (Volumes 361-363)
• Pages: 1598-1603
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.361-363.1598
• Online since: August 2013
• Authors: Hong Juan Wu*, Xin Yu Zhang
• Keywords: Chemical Composition, Recovery Asphalt, Recycled Asphalt Mixture, Rheological Property

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