摘要
基于氢氧化铝(ATH)沥青阻燃体系,通过极限氧指数与闪点温度测试,研究ATH与氢氧化镁(MH)的阻燃性能及Zeolite沸石粉的阻燃促进作用,提出ATH,MH及Zeolite沸石粉的复合阻燃沥青配合设计,利用研究成果制备开级配沥青磨耗层(OGFC)沥青混合料并测试其阻燃、路用性能。研究结果表明:ATH,MH和Zeolite三者按比例复合制备的阻燃沥青极限氧指数可达到29%以上,闪点温度近420℃,阻燃性能优异;所制备的OGFC沥青混凝土,当空隙率为20%时,动稳定度达到7365次/mm,燃烧时间较水泥混凝土缩短一半,逃逸汽油量高达89%,路表温度控制在200℃以下,空气温度不足50℃,其阻燃、路用性能优异。
Based on the flame-retarding system of ATH, the flame-retarding performance of ATH ＆ MH and the accelerating effect of zeolite powder through tests of limit oxygen index and flash point were studied, the mixture ratio of compound flame-retarding asphalt was presented, and the flre-retardant effect and road performance of open-graded asphalt friction course （OGFC） asphalt mixture which added to fire retardant was tested. The results show that the limit oxygen index of compound flame-retarding asphalt climbs to more than 29%, and the flash point comes to about 420 ℃, the flame-retarding performance of asphalt is improved greatly, and the GFC prepared by the author＇s method is in fact more advantageous than other asphalt pavement materials in dealing with gasoline, combustion time and high temperatures for its excellent fire-retarding performance. To be exact, the OGFC whose volume of air voids is 20% can help to resist the high temperature of the road surface within 200 ℃ and escape gasoline over 89%. In addition, the dynamic stability of porous asphalt pavement is 7 365 times/mm, which is considered to be perfect in the road performance.
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2009年第4期932-939,共8页
Journal of Central South University:Science and Technology
基金
国家高技术发展计划(863计划)项目(2006AA11Z117)
关键词
隧道路面
阻燃沥青
氢氧化铝
路用性能
开级配沥青磨耗层
tunnel pavement
flame-retarding asphalt
ATH
road performance
open-graded asphalt friction course
