Abstract
The purpose of this work is to investigate the effects of flame retardants on long-term aging and rheological characteristics of the modified asphalt binder. The flame retardants included #A (decabromodiphenyl ether, antimony trioxide, and zinc borate with the ratio of 3:1:1 by mass) and #B (tetrabromobisphenol A bis (2, 3-dibromopropyl ether), antimony trioxide with the ratio of 2:1 by mass). The results indicated that flame resistance of asphalt binder increase after PAV and UV aging processing, and the complex modulus also increase. The UV aging brings a plateau region of the phase angle master curves over the intermediate temperature range. This behavior is very weak in the studied PAV aging and unaged asphalt binder. Compared with #B modified asphalt binder, #A modified asphalt binder showed better flame retardancy and rheological characteristics before and after aging.
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