Sasobit对沥青混合料阻燃性能的影响

通过对添加Sasobit温拌剂的温拌及温拌阻燃沥青混合料进行试验研究,对比分析了其在添加阻燃剂前后混合料在水稳定性、高温稳定性、低温抗裂性等路用性能方面的变化,并参照GB/T10707—1989橡胶燃烧性能测试标准规定的极限氧指数测试方法,采用改进的试样制备方法,对SBS改性沥青和SBS改性阻燃沥青分别在添加不同掺量Sasobit温拌剂后的阻燃性能进行了试验研究.试验结果表明,Sasobit温拌沥青混合料在添加阻燃剂前后其路用性能均能满足规范要求,可以应用于隧道路面；然而氧指数试验结果表明,蜡基温拌剂Sasobit掺在沥青中有一定的助燃作用,它的添加会使沥青极限氧指数减小,阻燃性能变差,且随着其掺量的增加不断降低.

Influences of Sasobit on Asphalt Retardant Properties

The paper compared differences of water stability,high temperature stability,low temperature cracking resistance performance between warm mix asphalt with Sasobit and that additionally adding flame-retardant agent.And it also studied the flame-retardant properties of the SBS modified bitumen and SBS modified bitumen with retardant,adding different dosage of WMA-agent Sasobit,by the limiting-oxygen-index test using the improved sample preparation method,refering to GB/T10707—1989.The mixture tests’ results show that the road performance of warm mix asphalt,with Sasobit and that additionally adding flame-retardant agent could meet the standard requirements of hot mix asphalt.However,the improved limiting-oxygen-index test indicated that WMA-agent Sasobit based on wax is combustion-supporting adding in asphalt.It decreases the limiting-oxygen-index and flame-retardant properties of asphalt,and decreasing with the continued increase of the dosage.