环保型阻燃沥青性能分析与评价

Performance Analysis and Evaluation on Environmental Type Flame-Retarded Asphalt

运用对比分析法评价了SBS改性沥青以及掺加3种阻燃剂后阻燃改性沥青及其混合料的性能。采用极限氧指数、烟密度、烟气毒性分级、闪点、燃点等5种试验评价了4种胶结料的阻燃性能;采用常规指标和PG分级试验评价了4种胶结料的路用性能;采用车辙、冻断、冻融劈裂残留强度比、四点弯曲梁疲劳等4种试验评价了4种改性沥青混合料的路用性能。试验结果证明:掺加LK阻燃剂的阻燃沥青ZR-A各方面性能更优,并得到实体工程的验证。

The performances of SBS modified asphalt, three kinds of flame-retarded asphalts added in- to flame retardants and the mixtures are evaluated using contrastive analysis method. The five kinds of tests for determining limited oxygen index, smoke density and smoke toxicity grade , flash point and igni- tion point are used to evaluate the flame-retarded properties of four kinds of binders mentioned above. And common index and PG test are used to evaluate the binders＇ road performances. And tests of rutting, frost- break, freezing-thaw and freeze-thaw split four-point bending beam fatigue are used to evaluate mixtures＇ road performances. The test results show that the flame-retarded asphalt into which LK flame retardant is added has better performances than other asphalts on the aspects mentioned. And their performances are proved by practice.