不同老化方式下沥青混合料疲劳性能研究
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摘要
老化会使沥青混合料抗变形能力变差,故疲劳开裂一般产生于路面整体寿命的后期,此时不能再以材料初始性能来代表其疲劳性能。因此,对沥青混合料疲劳开裂的研究不应忽视老化因素。本研究将通过不同的老化方式对沥青混合料进行老化,并对不同老化方式下沥青混合料的疲劳性能进行对比,得出不同老化方式下混合料疲劳性能衰减规律。
Aging process will worsen the anti-deformation property of asphalt mixture, so fatigue cracking generally occurs at the later stage of the road surface overall life, while the fatigue performance can no longer be represented by the initial performance of the material.Therefore, aging factor should not be neglected in the study on asphalt mixture fatigue cracking. This study tested and compared fatigue performance of asphalt mixture which is aged by different methods in order to conclude the decay trend of fatigue performance of asphalt mixture under different aging conditions.
Aging process will worsen the anti-deformation property of asphalt mixture, so fatigue cracking generally occurs at the later stage of the road surface overall life, while the fatigue performance can no longer be represented by the initial performance of the material.Therefore, aging factor should not be neglected in the study on asphalt mixture fatigue cracking. This study tested and compared fatigue performance of asphalt mixture which is aged by different methods in order to conclude the decay trend of fatigue performance of asphalt mixture under different aging conditions.
引文
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[2]Harrigan,E.T.,Leahy,R.B.andYoutcheff,J.S.(1994)The Superpave mix design system:manual of sPecifications,test methods and practices,SHRPA-379,Strategic Highway Research Program(National Research Council,Washington,D.C.).
[3]Manual S P D.Shell International Petroleum Company[J].Limited,London,1978.
[4]Van Dijk W,Moreaud H,Quedeville A,et al.The fatigue of bitumen and bituminous mixes[C]//Pres-ented at the Third International Conference on the Structural Design of Asphalt Pavements,Grosvenor House,Park Lane,London,England,Sept.11-15,1972.1972,1(Proceeding).
[5]Verstraeten J,Veverka V,Francken L Rational and practical designs of asphalt pavements to avoid cracking and rutting[C]//Proceedings,Fifth International Conference on the Structural Design of Asphalt Pavements.1982,1:45-58.
[6]Kennedy T W.Characterization of asphalt pavement materials using the indirect tensile test[C]//Association of Asphalt Paving Technologists Proc.1977,46.
[7]Kennedy T W,Anagnos J N.PROCEDURES FOR THE STATIC AND REPEATED-LOAD INDIRECT TENSILE TESTS.INTERIM REPORT[R].1983.
[8]Scholz T,Hicks R G,SCHOLL L REPEATABILITY OF TESTING PROCEDURES FOR RESILIENT MODULUS AND FATIGUE.FINAL REPORT[R].1989.
[9]Khosla N P,Omer M S.Characterization of asphaltic mixtures for prediction of pavement performance[M].1985.
[10]唐健娟,龚凤刚,苑红凯,等.沥青混合料疲劳性能影响因素的正交试验分析[J].筑路机械与施工机械化,2009,26(4):51-53.