短期老化对岩沥青改性沥青流变性能的影响

Effect of Short-term Aging on Rheological Properties of Rock Asphalt Modified Asphalt

为探究不同老化温度下,短期老化作用对不同岩沥青改性沥青流变性能的影响,采用室内模拟试验对老化前后不同岩沥青改性沥青的常规性能和流变性能进行研究。结果表明:老化前添加不同岩沥青的改性沥青其高温性能及抗变形能力增强;在5~25℃时(低温区),163℃短期老化作用使布敦岩沥青改性沥青有较好的抗变形能力;在45~65℃时(高温区),178℃和193℃短期老化作用使新疆岩沥青改性沥青具有较好的抗变形能力。在高温区随着老化温度的升高,新疆岩沥青改性沥青抗车辙性能比布敦岩沥青改性沥青的抗车辙性能好。

In order to investigate the effect of short-term aging on the rheological properties of different rock asphalt modified asphalt under different aging temperatures.The conventional properties and rheological properties of different rock asphalt modified asphalt were studied by the Laboratory simulation test.The results show that the addition of different rock asphalt before aging modified asphalt with high temperature performance and deformation resistance capacity increased.In the 5~25℃(low temperature zone),the effect of short-term aging at 163℃has better deformation resistance capacity of the Buton Bock Asphalt modified asphalt.In the 45~65℃(high temperature zone),the effect of short-term aging at 178℃and 193℃has better deformation resistance capacity of the Xinjiang rock asphalt modified asphalt.In the high temperature area,the rutting resistance of Xinjiang rock asphalt modified asphalt is better than that of the Buton Bock Asphalt modified asphalt.