关键词: 沥青, 多聚磷酸, SBR, 韧性, 交联剂

Abstract: The optimized blend condition of PPA and SBR in asphalt and the technics of making such a asphalt was studied . The effects of plasticizer and crosslinking agent ,the technics of making asphalt were investigatated respectively .Results showed the addition of plasticizer in asphalt can improve the aging resistance but caused negative effects on toughness and tenacity, the use of crosslinking agent can improve the toughenss and tenacity of asphalt however reduce its low-temperature ductility ,Wth the increase of SBR`s dose in asphalt , low-temperature ductility of asphalt can be improved greatly by adopting suitable technics.

Key words: asphalt : polyphosphoric acid : SBR : tenacity : crosslinking agent: plasticizer agent: technics