冻融作用下沥青混合料中骨料级配的差异分析
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摘要
在季节性冻土地区,沥青路面反复经历冻融循环作用,极易出现开裂、坑槽、拥包等病害,其中以横向开裂最为显著。沥青的黏弹性能和骨料的级配特征是影响沥青混合料抗冻融能力的关键因素。目前,大量研究集中在沥青低温性能评价和沥青混合料低温性能研究方面,忽视了骨料级配在冻融前后的差异。该文通过现场调查和室内试验,分析了骨料级配与沥青混合料开裂情况的相关性。研究结果表明:在沥青满足设计要求的情况下,粗集料含量越少(级配曲线越靠近上限值),沥青路面的低温开裂越严重。严格控制骨料的施工配合比及抗压强度是保证沥青路面低温性能的关键。
引文
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[15]Zou,Y.and Boley,C.Compressibility of Fine-Grained Soils Subjected to Closed-System Freezing and Thaw Consolidation[J].Mining Science and Technology,2009,19(5):631-635.
[2]Behnia,B.,Dave,E.V.,Ahmed,S.,Buttlar,W.G.,et al.Effects of Recycled Asphalt Pavement Amounts on Low-Temperature Cracking Performance of Asphalt Mixtures Using Acoustic Emissions[J].Transportation Research Record:Journal of the Transportation Research Board,2011,2 208(1):64-71.
[3]马宏岩.AASHTO沥青路面低温开裂预估模型的验证与改进[D].哈尔滨工业大学硕士学位论文,2011.
[4]冯德成,郑天鸣,高畅.沥青路面低温开裂预估模型及其适用性分析[J].公路交通科技,2007(3).
[5]Li,X.and Marasteanu,M.O.Using Semi Circular Bending Test to Evaluate Low Temperature Fracture Resistance for Asphalt Concrete[J].Experimental Mechanics,2010,50(7):867-876.
[6]Anderson,D.A.,Lapalu,L.,Marasteanu,M.O.,et al.Low-Temperature Thermal Cracking of Asphalt Binders as Ranked by Strength and Fracture Properties[J].Transportation Research Record:Journal of the Transportation Research Board,2001,1 766(1):1-6.
[7]Marasteanu,M.O.,Li,X.,Clyne,T.R.,et al.Low Temperature Cracking of Asphalt Concrete Pavement[Z].Minnesota Department of Transportation,Minneapolis,MN.,MN/RC-2004-23.
[8]Dave,E.V.,Song,S.H.,Buttlar,W.G.et al.Reflective and Thermal Cracking Modeling of Asphalt Concrete Overlays[Z].Proc.Advance Characterization of Pavement and Soil Engineering Materials,2007:1 241-1 252.
[9]葛折圣,黄晓明,许国光.用弯曲应变能方法评价沥青混合料的低温抗裂性能[J].东南大学学报:自然科学版,2002(4).
[10]Soares,J.B.,Freitas,F.and Allen,D.H.,.Crack Modeling of Asphaltic Mixtures Considering Heterogeneity of the Material[J].Transportation Research Record,2003,1 832:113-120.
[11]张东,黄晓明,赵永利.沥青混合料抗裂性能评价指标对比研究[J].建筑材料学报,2012(2).
[12]刘栋,李立寒.沥青混合料抗裂性能评价指标的试验研究[J].建筑材料学报,2012(4).
[13]Ye,J.,Liao,J and Yang,C.Influence of Fine Aggregate on Initial Shrinkage of High Performance Concrete[J].Journal of Chongqing University(in Chinese),2009(2):168-172.
[14]Sousa,P.,Kassem,E.,Masad,E.,et al.New Design Method of Fine Aggregates Mixtures and Automated Method for Analysis of Dynamic Mechanical Characterization Data[J].Construction and Building Materials,2013,41:216-223.
[15]Zou,Y.and Boley,C.Compressibility of Fine-Grained Soils Subjected to Closed-System Freezing and Thaw Consolidation[J].Mining Science and Technology,2009,19(5):631-635.