摘要
采用锥形量热仪和马弗炉燃烧试验模拟隧道火灾的高温辐射条件,研究热辐射条件下复配阻燃剂对沥青混合料的阻燃耐火性能的影响。采用70#道路石油沥青,沥青混合料设计采用AC-13级配,油石比5.2%。制备阻燃沥青混合料时以阻燃剂替代部分矿粉,并按照规范制备复配阻燃沥青混合料马歇尔试件。试验结果表明:添加复配阻燃剂后,沥青混合料的点燃时间和烟气释放时间延迟,热量和烟气释放速率明显降低,稳定度和燃烧后残留稳定度均有所提高。复配阻燃剂有效提升了高温辐射条件下沥青混合料的阻燃抑烟和耐火性能。
Cone calorimeter and Muffle furnace combustion tests were used to simulate the high temperature radiation condition under tunnel fire, and then the influenees of composite flame retardants on the flame retardant and fire resistant performance of asphalt mixture under thermal radiation conditions were in- vestigated. The samples were prepared by 70 # road asphalt, designed by AC-13, oil stone ratio of 5.2%. Part of the mine powder was replaced by flame retardant during the preparation of flame retardant asphalt mixture. The Marshall test piece of composite flame retardant asphalt mixture was prepared accord- ing to the code. Experimental results indicated that by adding composite flame retardant, the ignition time and flue gas release time of asphalt mixture were delayed, the heat and smoke re- ease rate were significantly decreased, and the stability of asphalt mixture and the residual ratio of stability after combustion vere increased. In conclusion, composite flame retardant can ffeetively improve the flame retardant, smoke suppression and ire resistant performance of asphalt mixture under the condi- on of high temperature radiation.
出处
《消防科学与技术》
CAS
北大核心
2016年第12期1729-1731,共3页
Fire Science and Technology
基金
浙江省自然科学基金项目"基于沥青组成特性的阻燃性能优化研究"(LQ17E080011)
浙江省自然科学基金项目"贫氧高升温速率下沥青的热解燃烧特性及阻燃抑烟机理研究"(LY14E080014)
浙江省自然科学基金项目"基于热成像的硫化矿石自燃灾源识别研究"(LY14E04001)
国家自然科学基金项目"火灾工况沥青热解燃烧特性及纳米粘土/金属氢氧化物复合阻燃体系研究"(51408542)
关键词
高温辐射
沥青混合料
复配阻燃剂
耐火性能
锥形量热仪
high temperature radiation
asphalt mixture
com-posite flame retardant
fire resistant performance
cone calo-rimeter
