沥青混合料内部结构和组成对疲劳性能的影响研究

 采用一个沥青混合料小梁试件大样本，在相同条件下进行了应变控制疲劳试验，利用IMAQ数字图像处理软件对疲劳试验后的小梁试件中部纯弯段的内部结构和组成进行了处理和分析，定义了沥青混合料内部结构和组成的指标，进一步利用SPSS软件分析建立了疲劳试验结果参数与内部结构和组成指标的关系模型。分析表明，沥青混合料的疲劳寿命与沥青混合料内部结构和组成指标密切相关，沥青混合料疲劳寿命内部结构和组成的差异直接造成了相同条件下沥青混合料疲劳寿命的巨大差异，揭示了沥青混合料内部结构和组成对沥青混合料疲劳性能的影响规律。

Effect on Fatigue Properties of Inner Structure and Composition of Asphalt Mixtures

A big sample of beam specimens of asphalt mixtures was used to carry out strain-control fatigue tests under the same conditions. IMAQ digital image processing was used to process and analyze the inner structure and composition of the flexural section at the centre of the beam specimens through fatigue tests. In this way, the indices of the inner structure and composition of asphalt mixtures wre indentified. Furthermore, SPSS was used to establish a model on relationship between results of fatigue tests and indices of its inner structure and composition. The analysis result shows that fatigue properties of asphalt mixtures are directly correlated with the indices of its inner structure and composition, and the difference in the inner structure and composition of asphalt mixtures causes the significant difference in fatigue properties under the same conditions, which unveils the laws of effect of the inner structure and composition of asphalt mixtures on fatigue properties.