论文部分内容阅读
为探究级配离析对桥面上面层沥青混合料的影响,室内设计SMA-13的标准级配和4种离析级配,对不同的级配成型马歇尔试件,进行力学试验和车辙试验,测定其各项指标,并利用分形理论研究级配离析。研究结果表明:级配离析对沥青路面的空隙率和沥青饱和度影响很大,仅是轻度离析就超过了设计要求的上下限;SMA-13级配离析后抗水损害能力有所增强,但动稳定度下降很快;该文以修正的级配分维数D作为评价级配离析的指标,通过拟合级配分维数与空隙率的关系得到SMA-13的无离析D值范围为1.990~2.092。
In order to explore the effect of gradation separation on the asphalt mixture on the deck, standard design of SMA-13 and four kinds of segregation gradation for interior design, mechanical tests and rutting test were carried out on different gradation shaped Marshall specimens. Its various indicators, and the use of fractal theory study grading segregation. The results show that grading segregation has a great influence on the porosity and asphalt saturation of asphalt pavement, only the light segregation exceeds the upper and lower limits of design requirements; the ability of SMA-13 after grading segregation increases, However, the dynamic stability decreases rapidly. In this paper, the modified graded fractal dimension D is used as an index to evaluate the grading segregation. The relationship between the fractal dimension and the porosity is obtained. ~ 2.092.