阻燃温拌SBS改性沥青技术性能分析
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摘要
采用闪燃点、极限氧指数、三大指标(针入度、软化点、延度)、布氏旋转粘度、PG分级等试验,对比分析阻燃剂、温拌剂对SBS改性沥青阻燃性能、高温稳定性能、抗疲劳性能、低温抗裂性能、施工性能等的影响,评价所选用阻燃剂、温拌剂用于长隧道SBS改性沥青路面的有效性,以指导阻燃温拌沥青路面材料设计和施工。试验结果表明,阻燃剂能显著提高SBS改性沥青的阻燃性能。温拌剂能改善SBS改性沥青和阻燃SBS改性沥青的高温稳定性能。两类改性剂均会在一定程度上削弱SBS改性沥青的低温性能。温拌剂能有效地降低SBS改性沥青、阻燃SBS改性沥青的施工温度,有助于改善SBS改性沥青和阻燃SBS改性沥青的抗疲劳性能。
By flashing point,limiting oxygen index,the three major indexes( penetration,softening point,ductility), brookfield viscosity and PG grading tests,it is analyzed the influences of flame retardant and warm agents on SBS modified asphalt properties of flame retardant,high-temperature stability,fatigue resistance,low temperature crack resistance,workability and etc,and evaluated the effectiveness of flame retardant and warm agents on the SBS modified asphalt pavement in Long tunnel in order to guide the warm mixed and flame retardant asphalt pavement material design and construction. The test results show that the flame retardant can significantly improve the flame retardant performance of SBS modified asphalt,and warm agents can also improve high temperature stability. In a certain extent,two kinds of modifier can reduced low temperature performance of SBS modified asphalt. Warm agents can effectively reduce construction temperature of SBS modified asphalt and flameretarded SBS modified asphalt,can help to improve SBS modified asphalt and flame-retarded SBS modified asphalt fatigue resistance performance.
By flashing point,limiting oxygen index,the three major indexes( penetration,softening point,ductility), brookfield viscosity and PG grading tests,it is analyzed the influences of flame retardant and warm agents on SBS modified asphalt properties of flame retardant,high-temperature stability,fatigue resistance,low temperature crack resistance,workability and etc,and evaluated the effectiveness of flame retardant and warm agents on the SBS modified asphalt pavement in Long tunnel in order to guide the warm mixed and flame retardant asphalt pavement material design and construction. The test results show that the flame retardant can significantly improve the flame retardant performance of SBS modified asphalt,and warm agents can also improve high temperature stability. In a certain extent,two kinds of modifier can reduced low temperature performance of SBS modified asphalt. Warm agents can effectively reduce construction temperature of SBS modified asphalt and flameretarded SBS modified asphalt,can help to improve SBS modified asphalt and flame-retarded SBS modified asphalt fatigue resistance performance.
引文
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[2]曹乐,王修山.新型温拌阻燃沥青混合料的阻燃性能分析[J].交通标准化,2012(16):35-40.
[3]王修山,袁玉卿,郭涛,等.温拌阻燃沥青混合料特性分析[J].筑路机械与施工机械化,2012(12):44-49.
[4]LUSY,HAMERTON I.Recent Developments in the Chemistry of Halogen-free Flame Retardant Polymers[J].Progress in Polymer Science,2002,27(8):1661-1712.
[5]TROITZSCH J H.Overview of Flame Retardants[J].Chemistry Today,1998,16:1-19.
[6]BONATI A,MERUSI F,BOCHICCHIO G,eta.Effect of Nanoclay and Conventional Flame Retardants on Asphalt Mixtures Fire Reaction[J].Construction and Building Materials,2013,47:990-1000.
[7]孔宪明,余剑英,程松波,等.阻燃剂对SBS改性沥青混合料路用性能影响[J].武汉理工大学学报,2007(08):19-22.
[8]朱祖煌.温拌型阻燃沥青混合料的制备与性能研究[D].武汉:武汉理工大学,2011.
[9]南雪峰,夏乐,王莹.沥青混合料阻燃性能试验研究[J].公路,2012(07):224-228.
[10]JTG F20-2011,公路工程沥青及沥青混合料试验规程[S].
[11]徐婷.隧道阻燃抑烟沥青及其混合料技术性能与机理研究[D].西安:长安大学,2009.
[12]王庆国,张军,张峰.锥形量热仪的工作原理及应用[J].现代科学仪器,2003(06):36-39.
[13]严伟.阻燃改性沥青混合料的性能与应用研究[D].长沙:长沙理工大学,2009.
[14]魏建国,谢成,付其林.阻燃剂对沥青与沥青混合料性能的影响[J].中国公路学报,2013(06):30-37.
[15]任梵,张晓娇,孙海斌,等.国内外路用阻燃沥青的研究现状与展望[J].长安大学学报:自然科学版,2012(06):1-10.