沥青混合料低温临界开裂温度的确定
|
摘要
为了同时考虑沥青混合料在降温过程中温度应力的累积和松弛作用,确定临界开裂温度,对试件进行了线收缩系数试验,并利用间接拉伸试验确定其抗拉强度和蠕变柔量,由蠕变柔量和松弛模量的关系得到松弛模量的Prony系列表达式;由Boltzmann叠加原理,得到温度应力公式,计算出不同降温速率下产生的温度应力,根据低温抗拉强度曲线,确定出沥青混合料的临界开裂温度,并对结果予以验证。结果表明:该方法考虑了应力累积和松弛二者的综合作用,能够较好地反映沥青混合料的低温开裂特性,其计算结果与约束试件温度应力试验结果相近;该方法不仅适用于恒定降温速率,还适用于现场连续变速降温工况;随温度的降低或降温速率的增加沥青混合料内部温度应力累积速度加快,临界开裂温度随降温速率增加而升高。
In order to consider both the thermal stress accumulation and relaxation effects of asphalt concrete(AC)during the process of temperature drop,and determine the critical cracking temperature,the low temperature shrinkage coefficient tests were conducted on AC specimens,and the tensile strength and creep compliance were determined from indirect tensile tests.The Prony series representation of relaxation modulus was obtained from the theoretical relationship.The thermal stress was computed according to the Boltzmann superposition principle.Thermal stresses induced at several of temperature drop rates were analyzed and the critical cracking temperatures(CCT)were determined based on the tensile strength curve.The calculation results were verified.The results show that this approach can take both the stress accumulation and relaxation into consideration,and better represent the low temperature cracking characteristic of AC.The calculation results are similar to that obtained from thermal stress restrained specimen test(TSRST).This approach can apply to both uniform temperatures drop and continuous drop in the field.The rate of thermal stress accumulation increases with decreasing temperature or increasing drop rate.The CCT increases with increasing drop rate.
In order to consider both the thermal stress accumulation and relaxation effects of asphalt concrete(AC)during the process of temperature drop,and determine the critical cracking temperature,the low temperature shrinkage coefficient tests were conducted on AC specimens,and the tensile strength and creep compliance were determined from indirect tensile tests.The Prony series representation of relaxation modulus was obtained from the theoretical relationship.The thermal stress was computed according to the Boltzmann superposition principle.Thermal stresses induced at several of temperature drop rates were analyzed and the critical cracking temperatures(CCT)were determined based on the tensile strength curve.The calculation results were verified.The results show that this approach can take both the stress accumulation and relaxation into consideration,and better represent the low temperature cracking characteristic of AC.The calculation results are similar to that obtained from thermal stress restrained specimen test(TSRST).This approach can apply to both uniform temperatures drop and continuous drop in the field.The rate of thermal stress accumulation increases with decreasing temperature or increasing drop rate.The CCT increases with increasing drop rate.
引文
[1]交通运输部.公路沥青路面设计规范:JTG D50—2017[S].北京:人民交通出版社,2017.Ministry of Transport of the People’s Republic of China.Specifications for design of highway asphalt pavement:JTG D50—2017[S].Beijing:China Communication Press,2017(in Chinese).
[2]姚祖康.沥青路面结构设计[M].北京:人民交通出版社,2011.YAO Zukang.Structural design of asphalt pavements[M].Beijing:China Communication Press,2011(in Chinese).
[3]陈龙,朱建勇,何兆益,等.厂拌热再生沥青混合料低温抗裂与水稳定性研究[J].重庆交通大学学报(自然科学版),2017,36(4):38-44.CHEN Long,ZHU Jianyong,HE Zhaoyi,et al.Low Temperature anti-cracking performance and water stability of hot recycled asphalt mixture from central plant mixing[J].Journal of Chongqing Jiaotong University(Natural Science),2017,36(4):38-44(in Chinese).
[4]刘红瑛,常睿,张铭铭,等.多聚磷酸改性沥青及其混合料低温性能研究[J].湖南大学学报(自科版),2017,44(5):104-112.LIU Hongying,CHANG Rui,ZHANG Mingming,et al.Study on low temperature performance of polyphosphoric acid modified asphalt and asphalt mixture[J].Journal of Hunan University(Natural Science),2017,44(5):104-112(in Chinese).
[5]崔华杰,李立寒,刘栋.高模量沥青混凝土低温抗裂性能研究[J].公路交通科技,2014,31(2):37-41.CUI Huajie,LI Lihan,LIU Dong.Research on low-temperature anti-cracking performance of high modulus asphalt mixture[J].Journal of Highway and Transportation Research and Development,2014,31(2):37-41(in Chinese).
[6]谭忆秋,张磊,柳浩,等.基于约束试件温度应力试验评价几种沥青混合料的低温性能[J].公路,2010(01):171-175.TAN Yiqiu,ZHANG Lei,LIU Hao,et al.An evaluation of several kinds of asphalt mixtures’low-temperature performance based on TSRST[J].Highway,2010(01):171-175(in Chinese).
[7]BIRGISSON B,MONTEPARA A,ROMEO E,et al.Determination and prediction of crack patterns in hot mix asphalt(HMA)mixtures[J].Engineering Fracture Mechanics,2008,75(3-4):664-673.
[8]RAJBONGSHI P,DAS A.Estimation of temperature stress and low-temperature crack spacing in asphalt pavements[J].Journal of Transportation Engineering,2009,135(10):745-752.
[9]MARASTEANU M O,LI X,CLYNE T R,et al.Low temperature cracking of asphalt concrete pavement[R].Minnesota:University of Minnesota Department of Civil Engineering,2004.
[10]HILLS J F,BRIEN D.The fracture of bitumens and asphalt mixers by temperature induced stresses[J].Proceedings of the Association of Asphalt Paving Technologists,1966,35:292-309.
[11]TSCHOEGL,N.W.The phenomenological theory of linear viscoelastic behavior:An introduction[M].New York,NY:Springer-Verlag,1989.
[12]赵延庆,唐积民,白龙.利用沥青混合料复数模量确定松弛模量研究[J].建筑材料学报,2012,15(04):498-502.ZHAO Yanqing,TANG Jimin,BAI Long.Determination of relaxation modulus using complex modulus of asphalt mixture[J].Journal of Building Materials,2012(04),498-502(in Chinese).
[13]赵延庆,刘慧,白龙,等.沥青混合料本构关系对沥青力学响应的影响[J].中国公路学报,2012,1325(5):6-11.ZHAO Yanqing,LIU Hui,BAI Long,ea al.Effect of constitutive relationship of asphalt mixture on pavement response[J].China Journal of Highway and Transport,2012,25(5):6-11(in Chinese).
[14]赵延庆,吴剑,文健.沥青混合料动态模量及其主曲线的确定与分析[J].公路,2006(8):163-167.ZHAO Yanqing,WU Jian,WEN Jian.Determination and analysis of dynamic modulus of asphalt mixture and its master curve[J].Highway,2006(8):163-167(in Chinese).
[15]ZHAO Y Q,KIM Y R.The Time-temperature superposition for asphalt mixtures with growing damage and permanent deformation in compression[J]. Transportation Research Board,2003(1832):161-172.
[16]交通运输部公路科学研究院.公路工程沥青及沥青混合料试验规程:JTG E20—2011[S].北京:人民交通出版社,2011.Research Institute of Highway Ministry of Transport.Standard test methods of bitumen and bituminous mixtures for highway engineering:JTG E20—2011[S].Beijing:China Communication Press,2011(in Chinese).
[17]AASHTO Provisional Standard.Standard method of test for creep compliance and strength of hot-mix asphalt(HMA)using the indirect tensile test device:T322-03[S].Washington D C:American Association of State Highway and Transportation Official(AASHTO),1995.
[18]HUANG Y H.Pavement analysis and design[M].2nd ed.England Cliffs:Prentice Hall,2003.
[19]应荣华,田小革.沥青混凝土温度应力试验研究[J].公路,2001(4):66-69.YING Ronghua,TIAN Xiaoge.Tests on thermal Stress in asphalt cement sample[J].Highway,2001(4):66-69(in Chinese).
[20]AASHTO Provisional Standard.Standard test method for thermal stress restrained specimen tensile strength:TP10-93[S].Washington D C:American Association of State Highway and Transportation Official(AASHTO),1996.
[2]姚祖康.沥青路面结构设计[M].北京:人民交通出版社,2011.YAO Zukang.Structural design of asphalt pavements[M].Beijing:China Communication Press,2011(in Chinese).
[3]陈龙,朱建勇,何兆益,等.厂拌热再生沥青混合料低温抗裂与水稳定性研究[J].重庆交通大学学报(自然科学版),2017,36(4):38-44.CHEN Long,ZHU Jianyong,HE Zhaoyi,et al.Low Temperature anti-cracking performance and water stability of hot recycled asphalt mixture from central plant mixing[J].Journal of Chongqing Jiaotong University(Natural Science),2017,36(4):38-44(in Chinese).
[4]刘红瑛,常睿,张铭铭,等.多聚磷酸改性沥青及其混合料低温性能研究[J].湖南大学学报(自科版),2017,44(5):104-112.LIU Hongying,CHANG Rui,ZHANG Mingming,et al.Study on low temperature performance of polyphosphoric acid modified asphalt and asphalt mixture[J].Journal of Hunan University(Natural Science),2017,44(5):104-112(in Chinese).
[5]崔华杰,李立寒,刘栋.高模量沥青混凝土低温抗裂性能研究[J].公路交通科技,2014,31(2):37-41.CUI Huajie,LI Lihan,LIU Dong.Research on low-temperature anti-cracking performance of high modulus asphalt mixture[J].Journal of Highway and Transportation Research and Development,2014,31(2):37-41(in Chinese).
[6]谭忆秋,张磊,柳浩,等.基于约束试件温度应力试验评价几种沥青混合料的低温性能[J].公路,2010(01):171-175.TAN Yiqiu,ZHANG Lei,LIU Hao,et al.An evaluation of several kinds of asphalt mixtures’low-temperature performance based on TSRST[J].Highway,2010(01):171-175(in Chinese).
[7]BIRGISSON B,MONTEPARA A,ROMEO E,et al.Determination and prediction of crack patterns in hot mix asphalt(HMA)mixtures[J].Engineering Fracture Mechanics,2008,75(3-4):664-673.
[8]RAJBONGSHI P,DAS A.Estimation of temperature stress and low-temperature crack spacing in asphalt pavements[J].Journal of Transportation Engineering,2009,135(10):745-752.
[9]MARASTEANU M O,LI X,CLYNE T R,et al.Low temperature cracking of asphalt concrete pavement[R].Minnesota:University of Minnesota Department of Civil Engineering,2004.
[10]HILLS J F,BRIEN D.The fracture of bitumens and asphalt mixers by temperature induced stresses[J].Proceedings of the Association of Asphalt Paving Technologists,1966,35:292-309.
[11]TSCHOEGL,N.W.The phenomenological theory of linear viscoelastic behavior:An introduction[M].New York,NY:Springer-Verlag,1989.
[12]赵延庆,唐积民,白龙.利用沥青混合料复数模量确定松弛模量研究[J].建筑材料学报,2012,15(04):498-502.ZHAO Yanqing,TANG Jimin,BAI Long.Determination of relaxation modulus using complex modulus of asphalt mixture[J].Journal of Building Materials,2012(04),498-502(in Chinese).
[13]赵延庆,刘慧,白龙,等.沥青混合料本构关系对沥青力学响应的影响[J].中国公路学报,2012,1325(5):6-11.ZHAO Yanqing,LIU Hui,BAI Long,ea al.Effect of constitutive relationship of asphalt mixture on pavement response[J].China Journal of Highway and Transport,2012,25(5):6-11(in Chinese).
[14]赵延庆,吴剑,文健.沥青混合料动态模量及其主曲线的确定与分析[J].公路,2006(8):163-167.ZHAO Yanqing,WU Jian,WEN Jian.Determination and analysis of dynamic modulus of asphalt mixture and its master curve[J].Highway,2006(8):163-167(in Chinese).
[15]ZHAO Y Q,KIM Y R.The Time-temperature superposition for asphalt mixtures with growing damage and permanent deformation in compression[J]. Transportation Research Board,2003(1832):161-172.
[16]交通运输部公路科学研究院.公路工程沥青及沥青混合料试验规程:JTG E20—2011[S].北京:人民交通出版社,2011.Research Institute of Highway Ministry of Transport.Standard test methods of bitumen and bituminous mixtures for highway engineering:JTG E20—2011[S].Beijing:China Communication Press,2011(in Chinese).
[17]AASHTO Provisional Standard.Standard method of test for creep compliance and strength of hot-mix asphalt(HMA)using the indirect tensile test device:T322-03[S].Washington D C:American Association of State Highway and Transportation Official(AASHTO),1995.
[18]HUANG Y H.Pavement analysis and design[M].2nd ed.England Cliffs:Prentice Hall,2003.
[19]应荣华,田小革.沥青混凝土温度应力试验研究[J].公路,2001(4):66-69.YING Ronghua,TIAN Xiaoge.Tests on thermal Stress in asphalt cement sample[J].Highway,2001(4):66-69(in Chinese).
[20]AASHTO Provisional Standard.Standard test method for thermal stress restrained specimen tensile strength:TP10-93[S].Washington D C:American Association of State Highway and Transportation Official(AASHTO),1996.