基于BBR与FT-IR的沥青胶结料低温性能与抗老化能力分析
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摘要
为了评价几类沥青胶结料的低温性能和抗老化能力,分别对3种具有代表性的沥青胶结料(基质90#沥青、SBS改性沥青和A型温拌沥青)进行了旋转薄膜烘箱老化(RTFO)和压力老化(PAV)试验。并对老化后的胶结料进行了低温弯曲梁流变仪试验(BBR)和傅里叶红外光谱试验(FT-IR)。试验结果表明:沥青的老化对低温性能有直接的影响,而且温度的降低使这种影响更加显著。BBR试验从不同角度分析验证了SBS改性沥青具有相对最优的低温性能,而温拌沥青则相对较差。长期老化沥青FT-IR试验结论与BBR试验规律具有一致性,证明了微观层面揭示的分子官能团的变化规律与宏观层面显现的低温性能具有良好的对应关系。
引文
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[4]Aflaki S,Hajikarimi P,Fini E H,et al.Comparing Effects of Biobinder with other Asphalt Modifiers on Low-Temperature Characteristics of Asphalt[J].Journal of Materials in Civil Engineering,2014,26(3):429-439.
[5]Hajikarimi P,Aflaki S,Hhseini A S.Implementing Fractional Viscoelastic Model to Evaluate Low Temperature Characteristics of Crumb Rubber and Gilsonite Modified Asphalt Binders[J].Construction and Building Materials,2013,49:682-687.
[6]Xiao F,Punith V S,Amirkhanian S N,et al.Rheological and Chemical Characteristics of Warm Mix Asphalt Binders at Intermediate and Low Performance Temperatures[J].Canadian Journal of Civil Engineering,2013,40(9):861-868.
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[8]Jia X,Huang B,Bowers B F,et al.Infrared Spectra and Rheological Properties of Asphalt Cement Containing Waste Engine Oil Residues[J].Construction and Building Materials,2014,50:683-691.
[9]Wu S-P,Pang L,Mo L-T,et al.Influence of Aging on the Evolution of Structure,Morphology and Rheology of Base and SBS Modified Bitumen[J].Construction and Building Materials,2009,23(2):1 005-1 010.
[10]陈俊青.基于低温性能的沥青路面应用技术研究[D].长安大学硕士学位论文,2013.
[11]陈静云,孙依人,徐辉,等.利用改进开窗转换法确定沥青离散松弛时间谱[J].哈尔滨工业大学学报,2014(2).
[12]SENGOZ B,ISIKYAKAR G.Evaluation of Properties and Microstructure of SBS and EVA Polymer Modified Bitumen[J].Construction and Building Material,2007,22(7):1 897-1 905.
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[15]赵永利,顾凡,黄晓明.基于FTIR的SBS改性沥青老化特性分析[J].建筑材料学报,2011(5).
[16]刘峰,杨国良,陈乙轩,等.基于胶结料性能的炭黑沥青最佳配制温度研究[J].中外公路,2018(2).