基于抗剪强度的沥青混合料高温性能影响因素分析及改善措施研究的中期报告【摘要】本文针对沥青混合料在高温下容易出现软化变形、龟裂等问题，利用抗剪强度测试方法，研究了不同影响因素对沥青混合料高温性能的影响，并提出了改善措施。实验结果表明，沥青官能基含量、石棉纤维掺量、固体填料掺量等均对沥青混合料的高温性能有显著影响，其中石棉纤维掺量对抗剪强度影响最大，固体填料掺量对位移影响最大。通过增加沥青官能基含量、适量掺加石棉纤维和固体填料，可以显著提高沥青混合料的高温性能。【关键词】沥青混合料；抗剪强度；高温性能；改善措施【Abstract】Inordertosolvetheproblemsofsofteningdeformationandcrackingofasphaltmixtureathightemperature,theinfluencefactorsofasphaltmixturehightemperatureperformancewerestudiedbyusingshearstrengthtestmethod,andimprovementmeasureswereproposed.Experimentalresultsshowedthattheasphaltfunctionalgroupcontent,asbestosfibercontentandsolidfillercontenthadsignificanteffectsonthehightemperatureperformanceofasphaltmixture,amongwhichasbestosfibercontenthadthegreatestinfluenceonshearstrengthandsolidfillercontenthadthegreatestinfluenceondisplacement.Byincreasingtheasphaltfunctionalgroupcontent,addingappropriateamountofasbestosfiberandsolidfiller,thehightemperatureperformanceofasphaltmixturecanbesignificantlyimproved.【Keywords】Asphaltmixture;shearstrength;hightemperatureperformance;improvementmeasures