成型温度对温拌沥青混合料路用性能的影响

为研究温拌沥青混合料成型温度对其路用性能的影响规律,采用旋转压实仪不同温度下成型分别添加Aspha-min、Sasobit和DAT温拌剂制备的沥青混合料,通过沥青混合料密度试验、浸水马歇尔稳定度试验及冻融劈裂试验测定各项指标,得到3种温拌沥青混合料的密实性及水稳定性随成型温度的变化规律,同时得到3种温拌沥青混合料在不同气候分区的最佳成型温度范围。结果表明：随着成型温度的升高,3种温拌沥青混合料的密实性均得到有效的改善,但并未表现出明显的规律性;不同成型温度下,DAT温拌沥青混合料的水稳定性最好;对于潮湿和湿润区,成型温度取105~130℃,即可保证温拌沥青混合料的水稳定性。

Research on Influence of Molding Temperature on Pavement Performance of Warm Mix Asphalt Mixtures

To study the law of influence of molding temperature of warm mix asphalt on its pavement performance,this research uses asphalt mixtures molded by gyratory compactor at different temperatures and prepared with respective addition of Aspha-min,Sasobit and DAT warm mix agent,measures various indexes through asphalt mixture density test,immersion Marshall stability test and freeze-thaw split test and obtains the change law of compaction and water stability of three warm mix asphalt mixtures with molding temperature and their optimal molding temperature range in different climatic regions.The test result shows that the compaction of three warm mix asphalt mixtures is improved effectively but does not show an obvious law with the increase of molding temperature;at different molding temperatures,DAT warm mix asphalt mixture has the best water stability;for humid and wet regions,105~130℃ molding temperature can ensure the water stability of warm mix asphalt mixtures.