不同类型沥青胶浆自愈合行为方程
|
摘要
在设计耐久性路面时,自愈合技术在延长沥青路面使用寿命方面有着巨大优势。明晰沥青自愈合行为和定量评价沥青自愈合性能,是沥青自愈合技术应用的前提。基于扩散理论,将自愈合分为润湿愈合和扩散愈合两个过程,沥青的润湿愈合强度在裂缝开裂后的短时间内得以形成,进入间歇期后主要进行扩散愈合,且扩散愈合强度与愈合时间成线性关系,进而建立了考虑温度及愈合时间影响的沥青材料宏观自愈合行为方程,定量描述了沥青胶浆愈合强度随愈合时间变化的过程,对量化沥青材料的自愈合过程具有重要价值。然后,基于沥青的复数模量指标,提出以损伤恢复度作为宏观愈合能力评价指标。此外,在不同温度条件下对不同损伤度、填料类型、粉胶比、沥青类型的沥青胶浆进行疲劳自愈合试验,发现损伤恢复度与愈合时间具有较强的线性相关性,从而验证了提出的毛细扩散理论对沥青胶浆自愈合的适用性。最后,根据毛细扩散愈合机理和沥青组成成分特点,分析了不同沥青胶浆的自愈合行为的差异性。通过对不同沥青类型与温度条件下的胶浆愈合方程进行参数分析,发现可采用愈合方程曲线的截距和斜率分别表征沥青胶浆的润湿愈合强度与扩散愈合速率,进一步验证了理论方程的可靠性。
Self-healing technology has great superiority to extend the service life of asphalt pavement for designing durable pavement. Clarifying the self-healing behavior and quantitatively evaluating the self-healing performance of asphalt are the basis of application of self-healing technology. Based on diffusion theory, the self-healing process is divided into 2 steps, i.e., wetting healing and diffusion healing. The wetting healing strength of asphalt can be formed in a short time after cracks appear, the diffusion healing is mainly carried out after intermission, and the intensity of diffusion healing is linearly related to the healing time. The macroscopic self-healing behavior equation of asphalt materials considering temperature and healing time is established. It quantitatively describes the process of asphalt mastic healing strength changing with healing time, which is of great value for quantifying the self-healing process of asphalt materials. Then, based on the complex modulus of asphalt mastic, the damage recovery degree is proposed as the evaluation index of macro healing capability. In addition, the asphalt mastics with different damage degrees, filler types, filler-asphalt ratios and asphalt types are used to conduct the fatigue-healing test at different temperatures. The result shows that there is a strong linear correlation between the damage recovery degree and the healing time, which verified the applicability of the presented capillary diffusion theory to the self-healing of asphalt mastic. Finally, according to the capillary diffusion healing mechanism and the characteristics of asphalt components, the differences among self-healing behaviors of different asphalt mastics are analyzed. Through analyzing the parameters of mastic healing behavior equation with different asphalt types and temperatures, it is found that the intercept and the slope of the equation curve can be used respectively to characterize the wetting healing strength and diffusion healing rate of asphalt mastic, which further verified the reliability of the theoretical equation.
Self-healing technology has great superiority to extend the service life of asphalt pavement for designing durable pavement. Clarifying the self-healing behavior and quantitatively evaluating the self-healing performance of asphalt are the basis of application of self-healing technology. Based on diffusion theory, the self-healing process is divided into 2 steps, i.e., wetting healing and diffusion healing. The wetting healing strength of asphalt can be formed in a short time after cracks appear, the diffusion healing is mainly carried out after intermission, and the intensity of diffusion healing is linearly related to the healing time. The macroscopic self-healing behavior equation of asphalt materials considering temperature and healing time is established. It quantitatively describes the process of asphalt mastic healing strength changing with healing time, which is of great value for quantifying the self-healing process of asphalt materials. Then, based on the complex modulus of asphalt mastic, the damage recovery degree is proposed as the evaluation index of macro healing capability. In addition, the asphalt mastics with different damage degrees, filler types, filler-asphalt ratios and asphalt types are used to conduct the fatigue-healing test at different temperatures. The result shows that there is a strong linear correlation between the damage recovery degree and the healing time, which verified the applicability of the presented capillary diffusion theory to the self-healing of asphalt mastic. Finally, according to the capillary diffusion healing mechanism and the characteristics of asphalt components, the differences among self-healing behaviors of different asphalt mastics are analyzed. Through analyzing the parameters of mastic healing behavior equation with different asphalt types and temperatures, it is found that the intercept and the slope of the equation curve can be used respectively to characterize the wetting healing strength and diffusion healing rate of asphalt mastic, which further verified the reliability of the theoretical equation.
引文
[1]BAZIN P,SAUNIER J B.Deformability,Fatigue and Healing Properties of Asphalt Mixes[C]//International Conference on the Structural Design of Asphalt Pavements.Ann Arbor,US:International Society for Asphalt Pavements,1967:553-569.
[2]KIM Y R,LITTLE D N,LYTTON R L.Evaluation of Micro-damage,Healing,and Heat Dissipation of Asphalt Mixtures,Using a Dynamic Mechanical Analyzer[J].Transportation Research Record,2001,176:60-66.
[3]HOU Y,WANG L B,PAULI T,et al.Investigation of the Asphalt Self-healing Mechanism Using a Phase-field Model[J].Journal of Materials in Civil Engineering,2015,27(3):04014118.
[4]SUN D Q,HU J L,ZHU X Y.Size Optimization and Selfhealing Evaluation of Microcapsules in Asphalt Binder[J].Colloid and Polymer Science,2015,293(12):3505-3516.
[5]徐辰.沥青自愈合特性及影响因素研究[D].重庆:重庆交通大学,2013.XU Chen.Study on Characteristics of Asphalt Self-healing and Its Influencing Factors[D].Chongqing:Chongqing Jiaotong University,2013.
[6]ROBERTSON R E,BRANTHAVER J F,HARNSBE-RGER P M,et al.Fundamental Properties of Asphalts and Modified Asphalts,Vol II:Final Report,New Methods,FHWA-RD-99-213[R].McLean,US:Turner-Fairbank Highway Research Center,2001.
[7]LITTLE D N,LYTTON R,WILLIAMS D,et al.An Analysis of the Mechanism of Micro-damage Healing Based on the Application of Micromechanics First Principles of Fracture and Healing[J].Journal of the Association of Asphalt Paving Technologists,1999,68:501-542.
[8]SCHAPERY R A.On the Mechanics of Crack Closing and Bonding in Linear Viscoelastic Media[J].International Journal of Fracture,1989,39(1-3):163-189.
[9]KRINGOS N,PAULI T,ROBERT R,et al.AThermodynamic Approach to Healing in Bitumen[C]//7th RILEM Conference on Advanced Testing and Characterization of Bituminous Materials.London:Taylor and Francis Group,2009:123-132.
[10]WOOL R P,O'CONNOR K M.A Theory Crack Healing in Polymers[J].Journal of Applied Physics,1981,52(10):5953-5963.
[11]SHEN S H,SUTHARSAN T.Quantification of Cohesive Healing of Asphalt Binder and Its Impact Factors Based on Dissipated Energy Analysis[J].Road Materials and Pavement Design,2011,12(3):525-546.
[12]GARCA.Self-healing of Open Cracks in Asphalt Mastic[J].Fuel,2012,93(1):264-272.
[13]孙大权,张立文,梁果.沥青混凝土疲劳损伤自愈合行为研究进展(1):自愈合行为机理与表征方法[J].石油沥青,2011,25(5):7-11.SUN Da-quan,ZHANG Li-wen,LIANG Guo.Review on Self-healing Behavior of Asphalt Concrete(1)Mechanism and Characterization Methods of Self-healing Behavior[J].Petroleum Asphalt,2011,25(5):7-11.
[14]WASHBURN E W.The Dynamics of Capillary Flow[J].Physical Review,1921,17(3):273-283.
[15]SUN D Q,LIN T B,ZHU X Y,et al.Calculation and Evaluation of Activation Energy as a Self-healing Indication of Asphalt Mastic[J].Construction&Building Materials,2015,95:431-436.
[16]QIU J,WU S P,YU J Y,et al.Investigating Self Healing Behaviour of Pure Bitumen Using Dynamic Shear Rheometer[J].Fuel,2011,90(8):2710-2720.
[17]姜睆.沥青胶浆自愈合能力研究[D].武汉:武汉理工大学,2011.JIANG Huan.Research on Seal-healing Capacity of Bitumen Mastics[D].Wuhan:Wuhan University of Technology,2011.
[18]崔亚楠,赵琳,孙广宁.两种沥青胶浆的疲劳及自愈合性能试验[J].复合材料学报,2018,35(3):699-705.CUI Ya-nan,ZHAO Lin,SUN Guang-ning.Experimental Study on Fatigue and Self-healing Performance of Two Kinds of Asphalt Mortar[J].Acta Materiae Compositae Sinica,2018,35(3):699-705.
[19]单丽岩.基于粘弹特性的沥青疲劳流变机理研究[D].哈尔滨:哈尔滨工业大学,2010.SHAN Li-yan.Study on Asphalt Fatigue Rheological Mechanism Based on Viscoelastic Properties[D].Harbin:Harbin Institute of Technology,2010.
[20]肖庆一.沥青混合料油石界面研究[D].南京:东南大学,2004.XIAO Qing-yi.Study on Asphalt-aggregate Interface of Asphalt Mixture[D].Nanjing:Southeast University,2004.
[21]何曼君,陈维孝,董西侠.高分子物理[M].修订版.上海:复旦大学出版社,2000.HE Man-jun,CHEN Wei-xiao,DONG Xi-xia.Polymer Physics[M].Rev.ed.Shanghai:Fudan University Press,2000.
[2]KIM Y R,LITTLE D N,LYTTON R L.Evaluation of Micro-damage,Healing,and Heat Dissipation of Asphalt Mixtures,Using a Dynamic Mechanical Analyzer[J].Transportation Research Record,2001,176:60-66.
[3]HOU Y,WANG L B,PAULI T,et al.Investigation of the Asphalt Self-healing Mechanism Using a Phase-field Model[J].Journal of Materials in Civil Engineering,2015,27(3):04014118.
[4]SUN D Q,HU J L,ZHU X Y.Size Optimization and Selfhealing Evaluation of Microcapsules in Asphalt Binder[J].Colloid and Polymer Science,2015,293(12):3505-3516.
[5]徐辰.沥青自愈合特性及影响因素研究[D].重庆:重庆交通大学,2013.XU Chen.Study on Characteristics of Asphalt Self-healing and Its Influencing Factors[D].Chongqing:Chongqing Jiaotong University,2013.
[6]ROBERTSON R E,BRANTHAVER J F,HARNSBE-RGER P M,et al.Fundamental Properties of Asphalts and Modified Asphalts,Vol II:Final Report,New Methods,FHWA-RD-99-213[R].McLean,US:Turner-Fairbank Highway Research Center,2001.
[7]LITTLE D N,LYTTON R,WILLIAMS D,et al.An Analysis of the Mechanism of Micro-damage Healing Based on the Application of Micromechanics First Principles of Fracture and Healing[J].Journal of the Association of Asphalt Paving Technologists,1999,68:501-542.
[8]SCHAPERY R A.On the Mechanics of Crack Closing and Bonding in Linear Viscoelastic Media[J].International Journal of Fracture,1989,39(1-3):163-189.
[9]KRINGOS N,PAULI T,ROBERT R,et al.AThermodynamic Approach to Healing in Bitumen[C]//7th RILEM Conference on Advanced Testing and Characterization of Bituminous Materials.London:Taylor and Francis Group,2009:123-132.
[10]WOOL R P,O'CONNOR K M.A Theory Crack Healing in Polymers[J].Journal of Applied Physics,1981,52(10):5953-5963.
[11]SHEN S H,SUTHARSAN T.Quantification of Cohesive Healing of Asphalt Binder and Its Impact Factors Based on Dissipated Energy Analysis[J].Road Materials and Pavement Design,2011,12(3):525-546.
[12]GARCA.Self-healing of Open Cracks in Asphalt Mastic[J].Fuel,2012,93(1):264-272.
[13]孙大权,张立文,梁果.沥青混凝土疲劳损伤自愈合行为研究进展(1):自愈合行为机理与表征方法[J].石油沥青,2011,25(5):7-11.SUN Da-quan,ZHANG Li-wen,LIANG Guo.Review on Self-healing Behavior of Asphalt Concrete(1)Mechanism and Characterization Methods of Self-healing Behavior[J].Petroleum Asphalt,2011,25(5):7-11.
[14]WASHBURN E W.The Dynamics of Capillary Flow[J].Physical Review,1921,17(3):273-283.
[15]SUN D Q,LIN T B,ZHU X Y,et al.Calculation and Evaluation of Activation Energy as a Self-healing Indication of Asphalt Mastic[J].Construction&Building Materials,2015,95:431-436.
[16]QIU J,WU S P,YU J Y,et al.Investigating Self Healing Behaviour of Pure Bitumen Using Dynamic Shear Rheometer[J].Fuel,2011,90(8):2710-2720.
[17]姜睆.沥青胶浆自愈合能力研究[D].武汉:武汉理工大学,2011.JIANG Huan.Research on Seal-healing Capacity of Bitumen Mastics[D].Wuhan:Wuhan University of Technology,2011.
[18]崔亚楠,赵琳,孙广宁.两种沥青胶浆的疲劳及自愈合性能试验[J].复合材料学报,2018,35(3):699-705.CUI Ya-nan,ZHAO Lin,SUN Guang-ning.Experimental Study on Fatigue and Self-healing Performance of Two Kinds of Asphalt Mortar[J].Acta Materiae Compositae Sinica,2018,35(3):699-705.
[19]单丽岩.基于粘弹特性的沥青疲劳流变机理研究[D].哈尔滨:哈尔滨工业大学,2010.SHAN Li-yan.Study on Asphalt Fatigue Rheological Mechanism Based on Viscoelastic Properties[D].Harbin:Harbin Institute of Technology,2010.
[20]肖庆一.沥青混合料油石界面研究[D].南京:东南大学,2004.XIAO Qing-yi.Study on Asphalt-aggregate Interface of Asphalt Mixture[D].Nanjing:Southeast University,2004.
[21]何曼君,陈维孝,董西侠.高分子物理[M].修订版.上海:复旦大学出版社,2000.HE Man-jun,CHEN Wei-xiao,DONG Xi-xia.Polymer Physics[M].Rev.ed.Shanghai:Fudan University Press,2000.