多聚磷酸对沥青高低温性能及老化性能的影响研究

Effect of Polyphosphate on High and Low Temperature Properties and Aging Properties of Asphalt

为探析多聚磷酸(PPA)作为改良剂对沥青高低温性能及老化性能的影响,文中通过测试不同PPA掺量改性沥青的软化点、延度、黏度,分析PPA对沥青性能的改善效果。结果表明,高温下,PPA能显著提高沥青的软化点,增强其抗变形能力;低温下,PPA降低了改性沥青的脆点,提高了韧性和抗裂性。此外,PPA的加入减缓了沥青的老化过程,保持了其黏性和弹性,延长了使用寿命。

In order to investigate the effect of polyphosphoric acid(PPA)as an amendment on the high and low temperature properties and aging properties of asphalt.In this paper,the softening point,ductility and viscosity of modified asphalt with different PPA content were tested to analyze the improvement effect of PPA on asphalt properties.The results show that PPA can significantly improve the softening point of asphalt and enhance its deformation resistance at high temperature.At low temperature,PPA reduces the brittleness point of modified asphalt and improves the toughness and crack resistance.In addition,the addition of PPA slows down the aging process of asphalt,maintains its viscosity and elasticity,and extends its service life.