为了评价应力吸收层复合改性沥青混合料的低温抗裂性能,设计试验夹具和制作试件,确定试验参数并进行圆盘拉伸破坏试验,采用拉伸劲度、拉伸破坏强度、断裂能评价其低温抗裂性,分析矿料级配、试验温度、沥青结合料类型、油石比对混合料低温抗裂性能的影响。结果表明:断裂能是评价应力吸收层混合料低温抗裂性能的综合指标,矿料级配对其抗裂性能影响较敏感,贴近级配中值混合料抗裂性能并非最优;低温抗裂试验比较合理的温度为0 ℃;普通SBS改性沥青难以满足应力吸收层混合料低温抗裂性要求。
Abstract
In order to evaluate the low temperature anti-cracking performance of mixture with compound modified asphalt at stress absorbing layers, test fixture and specimens were designed, test parameters were determined and disk-shaped tension experiment was carried out, and then the low temperature anti-cracking performance was evaluated by tensile stiffness, tensile failure strength and fracture energy. Furthermore, the influence of aggregate gradation, test temperature, asphalt binder and asphalt aggregate ratio on low temperature anti-cracking performance was analyzed. The results indicate that the fracture energy is the comprehensive index to evaluate low temperature anti-cracking performance, aggregate gradation sensitively affects anti-cracking performance, the mixture with gradation close to median limit is not the best and the rational test temperature to evaluate low temperature anti-cracking performance is 0 ℃; the low performance of common SBS modified asphalt can not meet the demand of stress absorbing layers under low temperature.
关键词
道路工程 /
应力吸收层 /
试验研究 /
沥青混合料 /
低温抗裂性
{{custom_keyword}} /
Key words
road engineering /
stress absorbing layer /
experimental research /
asphalt mixture /
low temperature anti-cracking
{{custom_keyword}} /
中图分类号:
U416.224
{{custom_clc.code}}
({{custom_clc.text}})
{{custom_sec.title}}
{{custom_sec.title}}
{{custom_sec.content}}
参考文献
[1] 陈拴发,郑木莲,杨 斌,等.破裂水泥混凝土路面板沥青加铺层温度应力影响因素[J].交通运输工程学报,2005,5(3):25-30.
CHEN Shuan-fa,ZHENG Mu-lian,YANG Bin,et al.Thermal Stress Influence Factors of Asphalt Overlay on Cement Concrete Pavement Cracking Slab[J].Journal of Traffic and Transportation Engineering,2005,5(3):25-30.
[2]李淑明,许志鸿,蔡喜棉.土工织物对复合式路面结构内力影响分析[J].中国公路学报,2006,19(1):28-31.
LI Shu-ming,XU Zhi-hong,CAI Xi-mian.Analysis of Impact of Geo-textile on Stress of Composite Pavement Structure[J].China Journal of Highway and Transport,2006,19(1):28-31.
[3]廖卫东,王小雄.沥青加铺层抗反射裂缝足尺疲劳试验[J].长安大学学报:自然科学版,2006,26(5):9-12.
LIAO Wei-dong,WANG Xiao-xiong.Full-scale-fatigue Test on Anti-reflective Cracking of Asphalt Overlay[J].Journal of Chang'an University:Natural Science Edition,2006,26(5):9-12.
[4]李祖仲,陈拴发,张登良,等.应力吸收层沥青混合料的路用特性[J].长安大学学报:自然科学版,2008,28(2):5-8.
LI Zu-zhong,CHEN Shuan-fa,ZHANG Deng-liang,et al.Road Performance of Stress Absorbing Layers in Asphalt Mixture[J].Journal of Chang'an Univer-sity:Natural Science Edition,2008,28(2):5-8.
[5]陈拴发,彭 翀,王松根,等.贫混凝土基层沥青路面荷载应力有限元分析[J].长安大学学报:自然科学版,2007,27(6):1-5.
CHEN Shuan-fa,PENG Chong,WANG Song-gen,et al.Finite Element Analysis of Stress Caused by Load on Lean Concrete-asphalt Overlays Composite Pavement[J].Journal of Chang'an University:Natural Science Edition,2007,27(6):1-5.
[6]李祖仲,陈拴发,程 毅.Sampave应力吸收层厚度确定的数值模拟[J].河北工业大学学报,2008,37(2):82-85.
LI Zu-zhong,CHEN Shuan-fa,CHENG Yi.Numerical Analysis of Sampave Thickness for Stress Absorbing Layers[J].Journal of Hebei University of Technology,2008,37(2):82-85.
[7]杨旭东,邢明亮,程 毅,等.Sampave层模量对沥青加铺层结构内力影响分析[J].武汉理工大学学报,2009,31(9):8-12.
YANG Xu-dong,XING Ming-liang,CHENG Yi,et al.Analysis of Impact of Sampave Module on Stress of Asphalt Concrete Overlay[J].Journal of Wuhan University of Technology,2009,31(9):8-12.
[8]李祖仲,王伯禹,陈拴发.轴载对复合式路面应力吸收层荷载应力的影响[J].长安大学学报:自然科学版,2012,32(1):20-25.
LI Zu-zhong,Wang Bo-yu,CHEN Shuan-fa.Impact of Axle Load on Load Stress of Stress Absorbing Layer in Composite Pavement[J].Journal of Chang'an University:Natural Science Edition,2012,32(1):20-25.
[9]DEMPSEY B J.Development and Performance of Interlayer Stress Absorbing Composite in AC Overlays[J].Transportation Research Record,2002,1809:175-183.
[10]JTG E20—2011,公路工程沥青及沥青混合料试验规程[S].
JTG E20—2011,Standard Test Methods of Bitumen and Bituminous Mixtures for Highway Engineering[S].
[11]郑健龙,周志刚,张起森.沥青路面抗裂设计理论与方法[M].北京:人民交通出版社,2003.
ZHENG Jian-long,ZHOU Zhi-gang,ZHANG Qi-sen.Design Theory and Method for Cracking Resistance of Asphalt Pavements[M].Beijing:China Communications Press,2003.
[12]XUE L.Investigation of the Fracture Resistance of Asphalt Mixtures at Low Temperatures with a Semi Circular Bend Test[D].Mineapolis:University of Minnesota,2005.
[13]WAGONER M P,BUTTLAR W G,PAULINO G H.Laboratory Testing Suite for Material Characterization of Asphalt Concrete Mixtures[R].Champaign:University of Illinois at Urbana-Champaign,2009.
[14]廖卫东,陈拴发,刘炤宇.应力吸收层沥青混合料路用性能试验研究[J].公路交通科技,2009,26(3):11-16.
LIAO Wei-dong,CHEN Shuan-fa,LIU Zhao-yu.Experimental Research on Service Performance of Stress Absorption Interlayer[J].Journal of Highway and Transportation Research and Development,2009,26(3):11-16.
{{custom_fnGroup.title_cn}}
脚注
{{custom_fn.content}}
基金
“十一五”国家科技基础条件平台建设项目(2005DKA32800);交通运输部西部交通建设科技项目(2008 318 812 10);中央高校基本科研业务费专项资金项目(CHD2010JC011)
{{custom_fund}}
{{custom_fund}}