沥青混合料四点弯曲疲劳试验方法及夹具改进

Test Method of Four-Point Bending Fatigue for Asphalt Mixtures and Modification of Test Frame

综合介绍了沥青混合料四点弯曲小梁试件疲劳试验方法。在开展了近千次沥青混合料四点弯曲疲劳试验的基础上,分析评价了夹具的设计、疲劳试件的制备、疲劳试验的控制等环节中可能存在的影响沥青混合料四点弯曲疲劳试验结果的因素。并提出了保证和提高四点弯曲疲劳试验结果精确性的操作方法与相关建议。

Four-point bending beam fatigue test for asphalt mixtures is introduced in this paper.According to the experience of hundreds of four-point fatigue tests,the factors may affect the accuracy of test results are analyzed during the processes of test frame design,specimen preparation,and test control.The operation methods for improving the accuracy of four-point bending beam test results are suggested.