摘要
为解决高等级路面养护工程中加铺层层间黏结性不足的问题,制备了环氧树脂质量分数为30%、40%、50%的环氧沥青黏层材料,模拟SMA-13、AC-13、水泥混凝土铣刨路面加铺SMA-5超薄磨耗层结构形式,研究了不同洒布量对不同路面结构层间黏结性能的影响,基于最佳洒布量开展了剪切强度、拉拔强度、抗渗性能和低温柔性等路用性能实验,通过荧光光谱实验对测试结果进行了解释.结果表明:常温下洒布量对剪切性能有较大影响,对于SMA-13、AC-13、水泥混凝土路面三种下卧层结构的最佳洒布量分别为0.55 kg/m^(2)、0.6 kg/m^(2)、0.4 kg/m^(2);环氧树脂掺量在40%以上时,环氧沥青黏层能有效抵抗行车荷载下路面动水压力且肉眼观测不到明显裂纹.当环氧树脂掺量达到40%时,基质沥青已完全成为分散相,成连续相的环氧树脂相交结合空间更为宽广,此时环氧树脂固化形成的三维环氧结构网也具有较好的稳定性.
In order to solve the problem of insufficient adhesion between overlay layers in high-grade pavement maintenance engineering,epoxy asphalt adhesive layer materials with epoxy resin mass fraction of 30%,40%and 50%are prepared,and the bonding test pieces are prepared by simulating the structure of SMA-13,AC-13 and cement concrete milled pavement with SMA-5 ultra-thin wearing course.The effects of different spraying amount on the interlaminar bonding performance of different pavement structures are studied.Based on the optimal spraying amount,road performance tests such as shear strength,tensile strength,impermeability,and lowtemperature flexibility are conducted,and the test results are explained through fluorescence spectroscopy tests.The results indicate that the spraying amount at room temperature has a significant impact on the shear performance,The optimal spraying amounts for the three types of SMA-13,AC-13 and underlying layer structures on cement concrete pavement are 0.55kg/m^(2),0.6kg/m^(2),and 0.4kg/m^(2),respectively.With the increase of epoxy resin content,the tensile strengths of the samples are 1.89 MPa,2.43 MPa,and 2.57 MPa,respectively,and the fracture elongation rates are 351.7%,322.9%,and 318.6%,respectively.When the content of epoxy lipids reaches 40%,the matrix asphalt has completely become a dispersed phase,and the space for the continuous phase of epoxy resin to intersect and bond is wider.At this time,the three-dimensional epoxy structure network formed by the curing of epoxy resin is relatively stable.
作者
孙栋
杨行
胡恒武
SUN Dong;YANG Hang;HU Hengwu(Zhongda Intelligent Technology Co.,Ltd.,Changsha 410205,China;Engineering Safety and Intelligent Monitoring of Geologi-cal Disasters Hunan Engineering Research Center,Changsha 410205,China;School of Transportation,Changsha University of Science and Technology,Changsha 410114,China)
出处
《湖南工程学院学报(自然科学版)》
2025年第2期80-88,共9页
Journal of Hunan Institute of Engineering(Natural Science Edition)
基金
湖南省自然科学基金项目(2024JJ7618)
湖南省重点研发项目(2021GK2004).
关键词
超薄磨耗层
环氧沥青
洒布量
层间黏结性能
路用性能
ultra-thin wearing course
epoxy asphalt
spraying amount
interlayer bonding performance
pavement performance
