城市隧道温拌阻燃复合改性沥青铺装技术研究

Research on Warm Mix and Fflame Retardant Composite Modified Asphalt Pavement Technology for Urban Tunnels

出于隧道施工与运营期的环保和安全性考虑,本文对城市隧道采用温拌、阻燃特殊铺装技术的适用条件进行了探讨,并对温拌阻燃复合改性沥青技术进行了试验研究。结果表明:掺加沥青质量0.5%的表面活性温拌液可有效降低施工温度达20℃,优化了隧道铺装施工环境,收到节能环保效果;掺加沥青质量10%的阻燃剂可提高沥青氧指数至23%,大大降低隧道内火灾发生几率,提高隧道施工及运营期的安全性;温拌与阻燃复合改性兼容性佳,在不影响沥青混合料路用性能的前提下起到各自应有的效果。

Regarding environmental protection and safety,this paper discusses the application conditions of warm mix andflame retardant composite modified asphalt technology in city tunnel pavement. Test results showed that with surfactant warmmix agent at the rate of 0.5% of bitumen mass,the paving temperature can be reduced by 20℃. With flame retardant of 10%of bitumen mass,the oxygen index can be increased to 23%,highly reducing the fire risks and improving safety in the constructionand operation period.Warm mix and flame retardant asphalt is compatible with each other,showing their own functioningperformance meanwhile with no adverse effect on asphalt mixture.