研究了四种粉煤灰对沥青砼性能的影响 ,结果表明 :用四种粉煤灰配制的沥青混凝土其性能都满足现行标准要求。其中干排灰级配较好 ,比表面积较大 ,pH值表明其呈碱性 ,用其配制的沥青混凝土性能好 ;湿排灰级配波动大 ,pH值表明几乎呈中性 ,用其配制的沥青混凝土性能较差。因此 ,宜采用干排灰作为沥青混凝土粉料 The effects of four kinds of fly ash on the properties of asphalt concrete were studied. The results show that the performance of asphalt concrete prepared with four types of fly ash meets the current standards. In which dry ash ash gradation is better, the specific surface area is larger, the pH value indicates that it is alkaline, with its preparation of asphalt concrete performance is good; wet ash gradation fluctuations, the pH value shows almost neutral, with its preparation Asphalt concrete performance is poor. Therefore, dry ash should be used as asphalt concrete powder