为了研究沥青在自然环境下的老化反应，研发了环境温度箱，模拟了光、热、氧及水共同作用对沥青的老化，运用了红外光谱分析法研究了基质沥青、SBS 改性沥青及 PPA 改性沥青在不同老化时间后的分子结构组分变化，并利用羰基指数对沥青的老化程度评价。研究结果发现与基质沥青相比，丁二烯-苯乙烯共聚物 SBS 改性沥青和多聚磷酸 PPA改性沥青具有较高的抗老化分解。%In order to study the aging response of asphalt in the natural environment,this paper de-veloped the environment temperature box to simulate the light,heat,oxygen and water interaction of as-phalt aging,using the infrared spectra of matrix asphalt,SBS modified asphalt and PPA modified asphalt composition changes in the molecular structure of different aging time analysis method,and the use of car-bonyl index on aging degree of asphalt.Results showed that compared with the matrix asphalt,butadiene styrene copolymer of SBS modified asphalt and poly phosphoric acid of PPA modified asphalt aging de-composition with higher.
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