移动荷载作用下热再生沥青路面响应分析
|
摘要
为分析不同RAP掺量下热再生沥青混合料最佳沥青用量及RAP掺量对混合料强度的影响,利用马歇尔室内试验确定最佳沥青用量,并通过15℃和20℃下单轴压缩试验,分析热再生沥青混合料力学性能;利用3D-MOVE Analysis有限层软件分析移动非均布荷载作用下的再生沥青路面力学响应及RAP掺量对力学响应的影响。研究结果表明:RAP掺量增加,沥青混合料抗压性能有所提高;移动非均布荷载作用下,热再生沥青路面面层动力响应具有拉压应变交替变化现象及应变集中现象,易造成疲劳开裂;前后轮作用在计算点位时动力响应峰值相近,但基层及其下各层存在残余应变的影响;RAP掺量增加结构层内弯拉应变及竖向压应变有所减小,但沥青再生层层底剪应力有所增加。
In order to analyze the optimal asphalt-aggregate ratios of hot recycled asphalt under different RAP content and the strength with different RAP percentages, the mechanical performance was analyzed by uniaxial compression test at 15 ℃ and 20 ℃. The dynamic response of hot recycled asphalt pavement under moving vehicle loads and the dynamic response under different RAP content were obtained using 3 D-MOVE Analysis software. The results show that with the raise of RAP content, the compressive performance of asphalt mixture has improved; The dynamic response of strains in asphalt surface subjected to moving loads exhibit alteration between positive and negative value and the strain concentrate within the asphalt layer, which will cause fatigue cracking; The maximum dynamic response under the front wheel moving load and the rear-wheel moving load are close, but the base and the subgrade have residual strain; With the raise of RAP content, the flexural strain and vertical compressive strain decrese, but the shear stress in the asphalt layer increase.
In order to analyze the optimal asphalt-aggregate ratios of hot recycled asphalt under different RAP content and the strength with different RAP percentages, the mechanical performance was analyzed by uniaxial compression test at 15 ℃ and 20 ℃. The dynamic response of hot recycled asphalt pavement under moving vehicle loads and the dynamic response under different RAP content were obtained using 3 D-MOVE Analysis software. The results show that with the raise of RAP content, the compressive performance of asphalt mixture has improved; The dynamic response of strains in asphalt surface subjected to moving loads exhibit alteration between positive and negative value and the strain concentrate within the asphalt layer, which will cause fatigue cracking; The maximum dynamic response under the front wheel moving load and the rear-wheel moving load are close, but the base and the subgrade have residual strain; With the raise of RAP content, the flexural strain and vertical compressive strain decrese, but the shear stress in the asphalt layer increase.
引文
[1]JTG F41-2008,公路沥青路面再生技术规范[S].JTG F41-2008,Technical specifications for highway asphalt pavement recycling[S].
[2]拾方治,马卫民.沥青路面再生技术手册[M].北京:人民交通出版社,2006:10-12.SHI Fangzhi,MA Weimin.Technical manual on asphalt pavement recycling[M].Beijing:China Comunications Press,2006:10-12.
[3]何兆益,陈龙,陈先勇,等.厂拌热再生沥青混合料力学性能及应用研究[J].建筑材料学报,2016,19(5):871-875.HE Zhaoyi,CHEN Long,CHEN Xianyong,et al.Mechanical properties and application research of hot recycled asphalt mixture from central mixing plant[J].Journal of Building Materials,2016,19(5):817-875.
[4]马登成,任化杰,马尉倘.沥青路面就地热再生混合料级配优化设计[J].公路交通科技,2014,31(8):1-6.MA Dengcheng,REN Huajie,MA Weitang.Optimization design of gradation of mixture for asphalt pavement using hot in-place recycling technology[J].Journal of Highway and Transportation Research and Development,2014,31(8):1-6.
[5]薛彦卿,黄晓明.厂拌热再生沥青混合料在含LSPM路面结构中的应用及评价[J].湖南大学学报(自然科学版),2011,38(10):26-33.XUE Yanqing,HUANG Xiaoming.Application and evaluation of asphalt mixture by central plant hot recycling in pavement structure with LSPM[J].Journal of Hunan University(Natural Sciences),2011,38(10):26-33.
[6]薛彦卿,黄晓明.厂拌热再生沥青混合料力学性能试验研究[J].建筑材料学报,2011,14(4):507-511.XUE Yanqing,HUANG Xiaoming.Experimental research on mechanical property of asphalt mixture from central plant hot recycling[J].Journal of Building Materials,2011,14(4):507-511.
[7]李秀君,拾方治.乳化沥青冷再生路面结构力学分析[J].公路交通科技,2012,29(11):30-52.LI Xiujun,SHI Fangzhi.Analysis on mechanical performance of cold recycled pavement with emulsified asphalt[J].Journal of Highway and Transportation Research and Development,2012,29(11):30-52.
[8]李秀君,张永平,拾方治.泡沫沥青冷再生基层路面结构力学性能分析[J].同济大学学报(自然科学版),2009,37(1):47-51.LI Xiujun,ZHANG Yongping,SHI Fangzhi.Analysis of mechanical performance of cold recycled pavement with foamed asphalt[J].Journal of Tongji University(Natural Science),2009,37(1):47-51.
[9]Varik W R,Huber G,Pine W J,et al.Bailey method for gradation selection in hot-mix asphalt mixture design[C]//Imad AI-Qadi.Transportation Research Record(E-Circular No.E-C044).Washingtong D C:Transportation Research Board of National Academies,2002:10-20.
[10]邓晓青.厂拌热再生沥青混合料配比设计研究[D].西安:长安大学,2007.DENG Xiaoqing.Proportion design research of hot recycled asphalt mixture from central plant mixing[D].Xi’an:Chang’an University,2007.
[11]Christensen D W,Pellinen T K,Bonaquist R F.Hirsch model of estimating the modulus of asphalt concrete[J].Journal of the Association of Asphalt:Paving Technologist,2003,72:97-121.
[12]Siddharthan R V,Krishnamenon N,Mohey E M,et al.Validation of a pavement response model using full-scale field tests[J].International Journal of Pavement Engineering,2002,3(2):85-93.
[13]Henry J J,Wambold J C.Vehicle,tire,pavement interface[M].Philadelphia:American Society for Testing and Materials,1992:54-68.
[14]崔鹏,孙立军,胡晓.高等级公路长寿命路面研究综述[J].公路交通科技,2006,23(10):10-14.CUI Peng,SUN Lijun,HU Xiao.Perpetual pavement on high-grade highway[J].Journal of Highway and Transpotation Research and Development,2006,23(10):10-14.
[2]拾方治,马卫民.沥青路面再生技术手册[M].北京:人民交通出版社,2006:10-12.SHI Fangzhi,MA Weimin.Technical manual on asphalt pavement recycling[M].Beijing:China Comunications Press,2006:10-12.
[3]何兆益,陈龙,陈先勇,等.厂拌热再生沥青混合料力学性能及应用研究[J].建筑材料学报,2016,19(5):871-875.HE Zhaoyi,CHEN Long,CHEN Xianyong,et al.Mechanical properties and application research of hot recycled asphalt mixture from central mixing plant[J].Journal of Building Materials,2016,19(5):817-875.
[4]马登成,任化杰,马尉倘.沥青路面就地热再生混合料级配优化设计[J].公路交通科技,2014,31(8):1-6.MA Dengcheng,REN Huajie,MA Weitang.Optimization design of gradation of mixture for asphalt pavement using hot in-place recycling technology[J].Journal of Highway and Transportation Research and Development,2014,31(8):1-6.
[5]薛彦卿,黄晓明.厂拌热再生沥青混合料在含LSPM路面结构中的应用及评价[J].湖南大学学报(自然科学版),2011,38(10):26-33.XUE Yanqing,HUANG Xiaoming.Application and evaluation of asphalt mixture by central plant hot recycling in pavement structure with LSPM[J].Journal of Hunan University(Natural Sciences),2011,38(10):26-33.
[6]薛彦卿,黄晓明.厂拌热再生沥青混合料力学性能试验研究[J].建筑材料学报,2011,14(4):507-511.XUE Yanqing,HUANG Xiaoming.Experimental research on mechanical property of asphalt mixture from central plant hot recycling[J].Journal of Building Materials,2011,14(4):507-511.
[7]李秀君,拾方治.乳化沥青冷再生路面结构力学分析[J].公路交通科技,2012,29(11):30-52.LI Xiujun,SHI Fangzhi.Analysis on mechanical performance of cold recycled pavement with emulsified asphalt[J].Journal of Highway and Transportation Research and Development,2012,29(11):30-52.
[8]李秀君,张永平,拾方治.泡沫沥青冷再生基层路面结构力学性能分析[J].同济大学学报(自然科学版),2009,37(1):47-51.LI Xiujun,ZHANG Yongping,SHI Fangzhi.Analysis of mechanical performance of cold recycled pavement with foamed asphalt[J].Journal of Tongji University(Natural Science),2009,37(1):47-51.
[9]Varik W R,Huber G,Pine W J,et al.Bailey method for gradation selection in hot-mix asphalt mixture design[C]//Imad AI-Qadi.Transportation Research Record(E-Circular No.E-C044).Washingtong D C:Transportation Research Board of National Academies,2002:10-20.
[10]邓晓青.厂拌热再生沥青混合料配比设计研究[D].西安:长安大学,2007.DENG Xiaoqing.Proportion design research of hot recycled asphalt mixture from central plant mixing[D].Xi’an:Chang’an University,2007.
[11]Christensen D W,Pellinen T K,Bonaquist R F.Hirsch model of estimating the modulus of asphalt concrete[J].Journal of the Association of Asphalt:Paving Technologist,2003,72:97-121.
[12]Siddharthan R V,Krishnamenon N,Mohey E M,et al.Validation of a pavement response model using full-scale field tests[J].International Journal of Pavement Engineering,2002,3(2):85-93.
[13]Henry J J,Wambold J C.Vehicle,tire,pavement interface[M].Philadelphia:American Society for Testing and Materials,1992:54-68.
[14]崔鹏,孙立军,胡晓.高等级公路长寿命路面研究综述[J].公路交通科技,2006,23(10):10-14.CUI Peng,SUN Lijun,HU Xiao.Perpetual pavement on high-grade highway[J].Journal of Highway and Transpotation Research and Development,2006,23(10):10-14.