高模量沥青胶结料路用性能流变学分析
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摘要
以基质沥青、高模量改性沥青和SBS改性沥青的路用性能为研究对象,通过常规流变学试验方法,对比研究了高模量外掺剂和SBS改性剂对基质沥青黏弹特性的定性影响,并量化分析了不同外掺剂种类对基质沥青路用性能的影响;通过多应力重复蠕变恢复试验,对比研究了高模量外掺剂和SBS改性剂在提高基质沥青抗车辙能力上的差异和提高效果;基于加速疲劳试验方法对上述三大类沥青胶结料的疲劳损伤及失效特性进行对比研究,分析比较了不同沥青胶结料在疲劳损伤演化和疲劳寿命方面的差异.结果表明:RA(resin alloy)和PR(PR plasts)这2种常用高模量外掺剂在提高沥青胶结料劲度模量方面具有相近的效应;三大类沥青胶结料在相同试验温度条件下的永久变形抵抗能力排序为:高模量改性沥青>SBS改性沥青>基质沥青;三大类沥青胶结料疲劳寿命的排序为:SBS改性沥青>高模量改性沥青>基质沥青;此外,在使用相同基质沥青的条件下,掺加RA的高模量改性沥青比掺加PR的高模量改性沥青具有更好的抗疲劳性能.
The paving performances of matrix asphalt, high modulus modified asphalt and SBS modified asphalt were studied. Through the conventional rheological test, the influence of high modulus asphalt additives and SBS modifiers on the viscoelastic properties of matrix asphalt were compared and the effects of different additives on the paving performance of matrix asphalt were quantitatively analyzed. Through multiple stress creep recovery test, the difference and effect of high modulus asphalt additive and SBS modifier were compared in improving bituminous rutting resistance of matrix asphalt. Based on the accelerated fatigue test method, the fatigue damage and failure characteristics of three kinds of asphalt binders were compared, and the difference of fatigue process evolution and fatigue life between different asphalt binders was analyzed. The results show that RA and PR high modulus additive have a similar effect in improving asphalt binder stiffness modulus, the perpetual deformation resistance of three kinds of asphalt binder under the same test temperature is: high modulus modified asphalt is the highest, followed by SBS modified asphalt, and the matrix asphalt is the lowest, and the fatigue life of three kinds of asphalt binder is: SBS modified asphalt is the highest, followed by high modulus modified asphalt, and the matrix asphalt is the lowest. In addition, under the condition of using the same matrix asphalt, the high modulus modified asphalt with RA has better fatigue resistance than the high modulus modified asphalt with PR.
The paving performances of matrix asphalt, high modulus modified asphalt and SBS modified asphalt were studied. Through the conventional rheological test, the influence of high modulus asphalt additives and SBS modifiers on the viscoelastic properties of matrix asphalt were compared and the effects of different additives on the paving performance of matrix asphalt were quantitatively analyzed. Through multiple stress creep recovery test, the difference and effect of high modulus asphalt additive and SBS modifier were compared in improving bituminous rutting resistance of matrix asphalt. Based on the accelerated fatigue test method, the fatigue damage and failure characteristics of three kinds of asphalt binders were compared, and the difference of fatigue process evolution and fatigue life between different asphalt binders was analyzed. The results show that RA and PR high modulus additive have a similar effect in improving asphalt binder stiffness modulus, the perpetual deformation resistance of three kinds of asphalt binder under the same test temperature is: high modulus modified asphalt is the highest, followed by SBS modified asphalt, and the matrix asphalt is the lowest, and the fatigue life of three kinds of asphalt binder is: SBS modified asphalt is the highest, followed by high modulus modified asphalt, and the matrix asphalt is the lowest. In addition, under the condition of using the same matrix asphalt, the high modulus modified asphalt with RA has better fatigue resistance than the high modulus modified asphalt with PR.
引文
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[2] CORTE J-F,BROSSEAUD Y,KERZREHO J-P,et al.Study of rutting on the wearing courses of the LCPC test track[C]//8th International Conference on Asphalt Pavements.Seattle:Wash,1997:1555-1568.
[3] 扈少华.添加剂型高模量沥青混合料特性及应用技术研究[D].济南:山东建筑大学,2013.HU Shaohua.Study on properties and application technology of additive high modulus asphalt mixture[D].Jinan:Shandong Jianzhu University,2013.(in Chinese)
[4] 王立志,王鹏,徐强,等.添加剂型高模量沥青混合料作用机理[J].长安大学学报(自然科学版),2015,35(6):42-48.WANG Lizhi,WANG Peng,XU Qiang,et al.Action mechanism of additive high modulus asphalt mixture[J].Journal of Chang'an University(Natural Science),2015,35(6):42-48.(in Chinese)
[5] YUSOFF N I M,SHAW M T,AIREY G D.Modelling the linear viscoelastic rheological properties of bituminous binders[J].Construction and Building Materials,2011,25:2171-2189.
[6] YUSOFF N I M,JAKARNI F M,NGUYEN V H,et al.Modelling the rheological properties of bituminous binders using mathematical equations[J].Construction and Building Materials,2013,40:174-188.
[7] CHRISTENSEN D W,ANDERSON D A.Interpreation of dynamic mechanical test data for paving grade asphalt cements[J].Journal of Association of Asphalt Paving Technologists,1992,61:67-116.
[8] MARASTEANU M O,ANDERSON D A.Time-temperature dependency of asphalt binders-an improved model[J].Journal of Association of Asphalt Paving Technologists,1996,65:408-448.
[9] JOHNSON C M.Estimating asphalt binder fatigue resistance using an accelerated test method[D].Madison:University of Wisconsin-Madison,2010.
[10] AASHTO.Standard method of test for estimating damage tolerance of asphalt binders using the linear amplitude sweep[S].Washington,D.C.:AASHTO TP 101-14,2014.
[11] HINTZ C,BAHIA H.Simplification of linear amplitude sweep test and specification parameter[J].Transportation Research Record:Journal of the Transportation Research Board,2013,2370:10-16.
[12] AASHTO.MP19-10standard specification for performance-graded asphalt binder using multiple stress creep recovery(MSCR) test[S].Washington,D.C.:AASHTO,2010.
[13] AASHTO.Measuring asphalt binder yield energy and elastic recovery using the dynamic shear rheometer[S].Washington,D.C.:AASHTO TP 123,2016.