DOMIX改性沥青混合料特性试验研究

Experimental Study on Properties of DOMIX-modified Asphalt Mixture

对Domix沥青混合料及SBS改性沥青混合料的高温、低温、疲劳性能进行对比试验,探讨2种混合料在极端温度、重载下不发生车辙时的动稳定度控制标准,分析2种混合料对其动稳定度控制标准的适应性。试验结果表明:沥青路面上面层的抗车辙性能对沥青路面整体的抗车辙性能影响最明显;Domix沥青混合料低温性能及疲劳性能低于SBS改性沥青混合料。为平衡Domix沥青混合料低温及疲劳性能,基于其高温性能,提出Domix复掺改性的建议。

This paper carries out comparative test for high - temperature, low - temperature and fatigue properties of Domix asphalt mixture and SBS modified asphalt mixture, probes into control criteria for dynamic stability of 2 mixtures when ruts do not appear at extreme temperature and heavy load, and analyzes adaptability of 2 mixtures to control criteria for dynamic stability. The test results show that the rutting resistance of upper layer asphalt pavement exhibits most obvious influence on overall rutting resistance of asphalt pavement; low - temperature property and fatigue property of Domix mixture are inferior to the properties of SBS modified asphalt mixture. In order to balance low - temperature and fatigue properties of Domix asphalt mixture, the paper proposes recommendations for modification of Domix combined admixture based on its high -temperature property.