论文部分内容阅读
为了揭示阻燃剂种类和掺量对沥青与沥青混合料性能的影响规律,合理选择阻燃剂种类和掺量,首先采用极限氧指数和动态剪切试验分析了阻燃剂种类和掺量对沥青性能的影响;然后采用锥形量热仪试验,研究了阻燃剂对沥青混合料阻燃性能与路用性能的影响。结果表明:4种阻燃剂均提高了沥青车辙因子,降低了其延度,提高了抗老化性能,且降低了老化后软化点和延度降幅,DBDPO溴类、DPDPE溴类和APP膨胀类阻燃沥青极限氧指数较高;阻燃沥青混合料具有良好的高温稳定性、低温抗裂性和水稳定性,提高了引燃指数,降低了烟释放量,其中DBDPO溴类、DPDPE溴类和APP膨胀类阻燃剂阻燃效果较好,ATH无机类阻燃剂抑烟效果较好;阻燃剂提高了沥青及沥青混合料高温性能,降低了其低温性能。
In order to reveal the law of the influence of flame retardant types and dosage on the properties of asphalt and asphalt mixture, the types and dosage of flame retardant were reasonably selected. Firstly, the types and contents of flame retardant were analyzed by limiting oxygen index and dynamic shear test Bitumen performance. Then the cone calorimeter test was used to study the influence of flame retardant on the flame retardancy and road performance of asphalt mixture. The results showed that all four kinds of flame retardants improved the asphalt rutting factor, reduced the ductility, improved the anti-aging performance, reduced the softening point and ductility after aging, reduced the DBDPO bromine, DPDPE bromine and APP expansion Flame retardant asphalt has a higher limit oxygen index; flame retardant asphalt mixture has good high temperature stability, low temperature crack resistance and water stability, improve the ignition index and reduce the release of smoke, of which DBDPO bromine, DPDPE bromine And APP expansion flame retardant flame retardant effect is better, ATH inorganic flame retardant smoke better; flame retardant to improve the asphalt and asphalt mixture high temperature performance, reducing its low temperature performance.