温拌阻燃沥青混合料阻燃效果评价

通过氧指数、质量损失率及路用性能试验,研究EC130温拌剂、FRMAX型阻燃剂对沥青混合料阻燃效果的影响。试验结果显示,相比普通沥青混合料,阻燃沥青混合料、温拌阻燃沥青混合料氧指数分别增加23.3%、25.6%,质量损失率减小28.0%、32.0%,残留动稳定度增加14.0%、16.1%,残留最大弯拉应变增加14.1%、17.1%,冻融劈裂强度比增加5.3%、9.0%。相比普通沥青路面,阻燃沥青路面、温拌阻燃沥青路面发生火灾时能够减少34.0%、41.1%的毒害气体生成,并减少路面修补所需的混合料质量。其次得出普通沥青路面、阻燃沥青路面及温拌阻燃沥青路面的质量损失率、残留动稳定度、残留最大弯拉应变、残留冻融劈裂强度比与燃烧时间的关系模型。结果表明:阻燃剂对沥青混合料的阻燃效果显著;温拌剂有助于阻燃剂更好地发挥阻燃作用,降低火灾对道路的破坏,降低隧道火灾发生时有害气体的生成,提升隧道安全性。

On the effect evaluation of the asphalt mixture by means of warm-mixed flame retardant

The given paper is inclined to present its research and testing effects of the EC130 warming agent and the FRMAX flame retardant in their application to the flame retardant effect of the asphalt mixture by regulating the oxygen index,mass-losing rate through the performance test and the road status-in-situ application. The combustion effect of the tested pieces under the different oxygen content rate additions has been calculated and measured by XTZ-100 oxygen index meter and the limiting oxygen index measuring one. The maximalist oxygen index rate of the ordinary asphalt is equal to 21. 5%,whereas the limiting oxygen index of the flame retardant asphalt can be higher up to 26. 5%,that is,an increasing rate of 23. 3%. What is more,the limiting oxygen index of the warm mixed flame retardant asphalt should be 27. 0%,an increasing rate of 25. 6%. As for the burning time of the ordinary asphalt,the flame retardant asphalt and the warm mixed flame retardant asphalt mixture should be staying so long as to 296 s,248 s and 235 s,correspondingly and respectively. Furthermore,by the end of the combustion,the mass loss rate of the flame retardant asphalt and the warm mixed flame retardant asphalt mixture should have decreased or reduced by 28. 0% and 32. 0% as compared with the ordinary asphalt one,while the proportion of the poisonous gas generation can be managed to decrease by 34. 0% and 41. 1%. Secondly,the ANSYS software can also be recommended to be adopted to simulate the distribution of the internal temperature field of the 3 asphalt pavements under the fire conditions in correspondence with 5 MW,10 MW,20 MW,50 MW and 100 MW. And,then,as compared with the asphalt pavement,it would be possible for the flame retardant asphalt pavement to be reduced by15. 0%,9. 8%,8. 5%,7. 0%,6. 4% with no influence on the patching compound quality of the road surface. Moreover,the warm-mixed flame retardant asphalt can be saved by 18. 7%,12. 3%,10. 0%,9. 1% and 7. 3% with no influence on the road asphalt surface quality. Besides,as compared with the asphalt mixture,the mixture residual dynamic stability of the flame retardant asphalt and the warm-mixed flame retardant asphalt can be raised by 14. 0% and 16. 1%,with their residual maximum flexural-tensile strain increased by 14. 1%,and 17. 1%,accordingly. But,in contrast,the residual freeze-thaw split intensity ratio may increase by 5. 3% and 9. 0%. And,finally,the relationship model has to be achieved and gained between the burning time and the mass loss rate whereas the residual dynamic stability and the residual maximum flexural-tensile strain can properly be reserved. And,furthermore,the residual freeze-thaw split intensity ratio of the ordinary asphalt pavement and the flame retardant asphalt pavement plus the warm mixed flame retardant asphalt pavement can be all managed to get preserved.Thus,it can be said that it has been made possible for us to identify and determinate the relationship model between the burning time and the mass loss rate,while the residual dynamic stability and the residual maximum flexural-tensile strain;the residual freeze-thaw split intensity ratio of the ordinary asphalt pavement and that of the flame retardant asphalt pavement in addition to the definition of the warm mixed flame retardant asphalt pavement should also be identified and determinated. And,so,the eventual results of the above research work can demonstrate that the flame retardant has a significant flame retardant effect on the asphalt mixture,whereas the warming agent can indeed help the flame retardant to enact the flame to produce a better retardant effect. And,that is how for us to reduce the damage of the fire to the road by all means. Thus,in turn,the safety of the tunnel can be heightened and guaranteed whereas it is also realistic for us to improve and reduce the harmful gase output in the fire flaming.