掺加纤维对高模量沥青混合料柔韧性及路用性能影响研究
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摘要
为了评价单纤维及交织化复合纤维对BRA改性高模量沥青混合料性能的增强作用,并揭示纤维对高模量沥青混合料的增柔增韧改性机理。采用半圆针入度试验、直接拉伸试验和直接剪切试验研究了纤维对高模量沥青柔韧性和剪切性能的影响,通过电子显微镜(SEM)分析了纤维BRA高模量沥青的表面形貌特征,并采用车辙试验、贯入剪切试验、低温弯曲试验、冻融劈裂、浸水马歇尔试验、间接拉伸疲劳试验和MMLS1/3加速加载试验评价了纤维高模量沥青混合料的各项性能。结果表明,掺加单纤维及交织化复合纤维能显著提高BRA高模量沥青的蠕变柔量和抗剪切强度;纤维的微观形貌差异决定了不同纤维原材料对高模量沥青及其混合料性能改善效果有一定侧重点,采用交织化纤维复配方案恰好实现了不同纤维对BRA改性沥青性能改善效果的叠加作用;m(木质素纤维)∶m(聚酯纤维)∶m(玄武岩纤维)=1∶2∶2组成的交织化纤维,其对高模量沥青混合料各项路用性能有较大提升并且更加均衡,改性效果更佳明显;交织化纤维方案对改善高模量沥青混合料低温抗裂性能、长期高温稳定性和抗疲劳耐久性方面有较好技术优越性。
In order to evaluate the reinforcing effect of single fiber and composite fiber on the performance of BRA modified high modulus asphalt mixture,the mechanism of fiber softening and toughening modification of high modulus asphalt mixture was revealed.The effects of fiber on the flexibility and shear properties of high modulus asphalt were studied by semi-circular penetration test,direct tensile test and direct shear test.The surface shape of fiber BRA high modulus asphalt was analyzed by electron microscopy(SEM).The rutting test,penetration shear test,low temperature bending test,freeze-thaw splitting,water-immersed Marshall test,indirect tensile fatigue test and MMLS1/3 accelerated loading test were used to evaluate the fiber high modulus asphalt mixture.The results show that the addition of single fiber and interwoven composite fiber could significantly improve the creep compliance and shear strength of BRA high modulus asphalt.The difference in fiber morphology determined the high modulus asphalt and its mixing.The material performance improvement effect had a certain focus.The interwoven fiber blending scheme just achieved the superposition effect of different fibers on the performance improvement of BRA modified asphalt.The interwoven fiber with m(lignin fiber)∶mpolyester fiber)∶m(basalt fiber)=1∶2∶2 had higher performance and more balanced performance for high modulus asphalt mixture,and the modification effect was better and obvious.The interwoven fiber solution improved the low temperature crack resistance of the high modulus asphalt mixture.It had good technical superiority in long-term high temperature stability and fatigue durability.
In order to evaluate the reinforcing effect of single fiber and composite fiber on the performance of BRA modified high modulus asphalt mixture,the mechanism of fiber softening and toughening modification of high modulus asphalt mixture was revealed.The effects of fiber on the flexibility and shear properties of high modulus asphalt were studied by semi-circular penetration test,direct tensile test and direct shear test.The surface shape of fiber BRA high modulus asphalt was analyzed by electron microscopy(SEM).The rutting test,penetration shear test,low temperature bending test,freeze-thaw splitting,water-immersed Marshall test,indirect tensile fatigue test and MMLS1/3 accelerated loading test were used to evaluate the fiber high modulus asphalt mixture.The results show that the addition of single fiber and interwoven composite fiber could significantly improve the creep compliance and shear strength of BRA high modulus asphalt.The difference in fiber morphology determined the high modulus asphalt and its mixing.The material performance improvement effect had a certain focus.The interwoven fiber blending scheme just achieved the superposition effect of different fibers on the performance improvement of BRA modified asphalt.The interwoven fiber with m(lignin fiber)∶mpolyester fiber)∶m(basalt fiber)=1∶2∶2 had higher performance and more balanced performance for high modulus asphalt mixture,and the modification effect was better and obvious.The interwoven fiber solution improved the low temperature crack resistance of the high modulus asphalt mixture.It had good technical superiority in long-term high temperature stability and fatigue durability.
引文
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[3]Wu Zhaoyang,Ren Zhongshan.Effect of rubber powder content on the performance of high modulus asphalt and its mixture[J].Engineering Journal of Wuhan University,2016,49(3):411-416(in Chinese).吴朝阳,任仲山.橡胶粉掺量对高模量沥青及其混合料性能的影响[J].武汉大学学报(工学版),2016,49(3):411-416.
[4]Yang Peng.Characteristics of behavior of high modulus asphalt and high modulus asphalt mixture[D].Guangzhou:South China University of Technology,2015(in Chinese).杨朋.高模量沥青及其混合料特性研究[D].广州:华南理工大学,2015.
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[6]Lu Jingjing.Study on the factors affecting the performance of rubber asphalt and its modification mechanism[D].Xi'an:Chang'an University,2015(in Chinese).陆晶晶.橡胶沥青性能影响因素与改性机理研究[D].西安:长安大学,2015.
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[8]Lee H J,Lee J H,Park H M.Performance evaluation of high modulus asphalt mixtures for long life asphalt pavements[J].Construction and Building Materials,2017,31(5):1079-1087.
[9]Hofko B.Addressing the entire deformation behavior of hot mix asphalt by triaxial cyclic compression testing with cyclic confining pressure[J].Journal of Traffic and Transportation Engineering:English Edition,2015,2(1):17-29.
[10]Wang Lizhi,Wang Peng,Xu Qiang.Mechanism research on additives of high modulus asphalt mixture[J].Journal of Chang'an University(Natural Science Edition),2015,35(6):42-48(in Chinese).王立志,王鹏,徐强.添加剂型高模量沥青混合料作用机理[J].长安大学学报(自然科学版),2015,35(6):42-48.
[11]Wang Hong.Study on crack resistance of TPS modified asphalt and its mxture by polyester fiber[J].Highway,2016,60(10):209-214(in Chinese).王宏.聚酯纤维对TPS改性沥青及其混合料抗裂性能研究[J].公路,2016,60(10):209-214.
[12]Wang Hong.Experimental study on softening toughening and modification mechanism of polyester fiber for hard asphalt mixture[J].Highway,2016,60(3):160-166(in Chinese).王宏.聚酯纤维对硬质沥青混合料增柔增韧性及改性机理试验研究[J].公路,2016,60(3):160-166.
[13]Xu Tingting,Gu Xingyu,Ni Fujian.Experiment research on performance of basalt fiber reinforced asphalt concrete[J].Journal of Transportation Engineering and Information,2016,14(2):115-121(in Chinese).许婷婷,顾兴宇,倪富健.玄武岩纤维增强沥青混凝土试验与性能研究[J].交通运输工程与信息学报,2016,14(2):115-121.
[14]Gao Huiting,Zhang Ying,Zhang Ling.Research on low temperature crack resistance of hybrid fiber asphah mixture[J].Journal of Jilin Institute of Architecture&Civil Engineering,2016,33(3):37-39(in Chinese).高慧婷,张颖,张亮.混杂纤维沥青混合料低温抗裂性的研究[J].吉林建筑工程学院学报,2016,33(3):37-39.
[15]Chen Lifeng,Guan Yongsheng.Application of durable high modulus asphalt mixture based on low-grain asphalt pellet blending technology[J].Highway Traffic Technology,2014,16(6):14-19(in Chinese).陈李峰,关永胜.基于低标号沥青颗粒掺配技术的耐久性高模量沥青混合料应用研究[J].公路交通技术,2014,16(6):14-19.
[16]Zha Xudong,Qian Guangyao,Zhang Yunfan.Research on suitable mixing amount for BRA modified asphalt mixture AC-13C[J].Transportation Science and Engineering,2015,31(2):1-6(in Chinese).查旭东,钱光耀,张云帆.RA改性沥青混合料AC-13C适宜掺量的研究[J].交通科学与工程,2015,31(2):1-6.
[2]Laboratoire Central des Pontset Chaussées.LPC bituminous mixtures design guide[M].Paris:Laboratoire Central des Pontset Chaussées,2007.
[3]Wu Zhaoyang,Ren Zhongshan.Effect of rubber powder content on the performance of high modulus asphalt and its mixture[J].Engineering Journal of Wuhan University,2016,49(3):411-416(in Chinese).吴朝阳,任仲山.橡胶粉掺量对高模量沥青及其混合料性能的影响[J].武汉大学学报(工学版),2016,49(3):411-416.
[4]Yang Peng.Characteristics of behavior of high modulus asphalt and high modulus asphalt mixture[D].Guangzhou:South China University of Technology,2015(in Chinese).杨朋.高模量沥青及其混合料特性研究[D].广州:华南理工大学,2015.
[5]Ouyang Wei.Study on application technology of high modulus asphalt concrete[D].Shenyang:Northeastern University,2016(in Chinese).欧阳伟.高模量沥青混凝土抗车辙性能研究[D].沈阳:东北大学,2016.
[6]Lu Jingjing.Study on the factors affecting the performance of rubber asphalt and its modification mechanism[D].Xi'an:Chang'an University,2015(in Chinese).陆晶晶.橡胶沥青性能影响因素与改性机理研究[D].西安:长安大学,2015.
[7]Wu C Y,Jing B,Li X Y.Performance evaluation of highmodulus asphalt mixture[J].Advanced Materials Research,2015,32(4):2138-2141.
[8]Lee H J,Lee J H,Park H M.Performance evaluation of high modulus asphalt mixtures for long life asphalt pavements[J].Construction and Building Materials,2017,31(5):1079-1087.
[9]Hofko B.Addressing the entire deformation behavior of hot mix asphalt by triaxial cyclic compression testing with cyclic confining pressure[J].Journal of Traffic and Transportation Engineering:English Edition,2015,2(1):17-29.
[10]Wang Lizhi,Wang Peng,Xu Qiang.Mechanism research on additives of high modulus asphalt mixture[J].Journal of Chang'an University(Natural Science Edition),2015,35(6):42-48(in Chinese).王立志,王鹏,徐强.添加剂型高模量沥青混合料作用机理[J].长安大学学报(自然科学版),2015,35(6):42-48.
[11]Wang Hong.Study on crack resistance of TPS modified asphalt and its mxture by polyester fiber[J].Highway,2016,60(10):209-214(in Chinese).王宏.聚酯纤维对TPS改性沥青及其混合料抗裂性能研究[J].公路,2016,60(10):209-214.
[12]Wang Hong.Experimental study on softening toughening and modification mechanism of polyester fiber for hard asphalt mixture[J].Highway,2016,60(3):160-166(in Chinese).王宏.聚酯纤维对硬质沥青混合料增柔增韧性及改性机理试验研究[J].公路,2016,60(3):160-166.
[13]Xu Tingting,Gu Xingyu,Ni Fujian.Experiment research on performance of basalt fiber reinforced asphalt concrete[J].Journal of Transportation Engineering and Information,2016,14(2):115-121(in Chinese).许婷婷,顾兴宇,倪富健.玄武岩纤维增强沥青混凝土试验与性能研究[J].交通运输工程与信息学报,2016,14(2):115-121.
[14]Gao Huiting,Zhang Ying,Zhang Ling.Research on low temperature crack resistance of hybrid fiber asphah mixture[J].Journal of Jilin Institute of Architecture&Civil Engineering,2016,33(3):37-39(in Chinese).高慧婷,张颖,张亮.混杂纤维沥青混合料低温抗裂性的研究[J].吉林建筑工程学院学报,2016,33(3):37-39.
[15]Chen Lifeng,Guan Yongsheng.Application of durable high modulus asphalt mixture based on low-grain asphalt pellet blending technology[J].Highway Traffic Technology,2014,16(6):14-19(in Chinese).陈李峰,关永胜.基于低标号沥青颗粒掺配技术的耐久性高模量沥青混合料应用研究[J].公路交通技术,2014,16(6):14-19.
[16]Zha Xudong,Qian Guangyao,Zhang Yunfan.Research on suitable mixing amount for BRA modified asphalt mixture AC-13C[J].Transportation Science and Engineering,2015,31(2):1-6(in Chinese).查旭东,钱光耀,张云帆.RA改性沥青混合料AC-13C适宜掺量的研究[J].交通科学与工程,2015,31(2):1-6.