基于新型骨架嵌挤原理的沥青混合料设计方法研究

发布时间：2018-03-07 11:56

  本文选题：新型沥青混合料　切入点：骨架嵌挤　出处：《山东建筑大学》2017年硕士论文　论文类型：学位论文

【摘要】：自沥青混合料诞生以来,因其优异的性能表现而成为全世界高等级路面材料之一,随着新交通环境的不断变化,对沥青混合料性能的要求也在不断提高。骨架密实型沥青混合料以高内摩阻力的矿料结构和适当的细料胶浆水平而具有出色的路用性能表现。论文总结了现有级配设计理论及方法,基于法国GB5沥青混合料设计的理论基础,提出适合我国筛孔的新型骨架嵌挤沥青混合料设计方法,通过室内试验对比验证该方法的可行性。首先,就目前常用矿料级配理论和骨架密实型沥青混合料矿料级配设计方法做了简单概述。针对最大密度曲线理论,借助分形理论在沥青混合料领域的应用,从计算公式参数取值上分析其相关性,并建立了他们之间的联系。Superpave级配设计方法、美国贝雷法、CAVF法、SAC法和MDBG法均属于骨架密实级配设计方法,其中,后4种设计方法的理论基础为粒子干涉理论。其次,对法国GB5沥青混合料及其设计方法做了系统介绍,分析了单一粒径集料颗粒间的边界作用和干涉作用,分析了矿料空隙比随粗细集料粒径比的变化规律,对GB5级配设计方法的公式进行了解析。再次,基于法国新型骨架嵌挤理论和采用Superpave旋转压实仪制备试件,确定级配设计基础参数,提出设计骨架密实型沥青混合料新方法。最后,选用优质玄武岩和SBS改性沥青制备沥青混合料,对比分析基于新型骨架嵌挤理论设计的GB5-13沥青混合料和用传统马歇尔设计法获得SMA-13沥青混合料。借助室内60℃车辙试验、单轴贯入试验、低温小梁弯曲试验、浸水试验、冻融劈裂试验、单轴动态模量试验和四点弯曲疲劳试验对两种沥青混合料做路用性能对比。试验结果显示,GB5-13沥青混合料矿料级配偏粗,沥青用量小,密实度高,车辙试验和抗剪试验证明其高温稳定性较好,低温抗裂性能比SMA-13沥青混合料稍差,抗水损害水平高,应变控制模式下的疲劳试验表明其劲度模量高,疲劳寿命比SMA-13低,其20℃-10Hz条件下的动态模量较SMA-13高31%。综上所述,基于新型骨架嵌挤原理的GB5-13沥青混合料的经济性和综合路用性能较好,具有一定的推广价值。
[Abstract]:Since the birth of asphalt mixture, it has become one of the high-grade pavement materials in the world because of its excellent performance. The requirements for the performance of asphalt mixture are also being improved. The skeleton dense asphalt mixture has excellent road performance due to its high internal friction structure and proper fine slurry level. The existing grade is summarized in this paper. The theory and method of matching design, Based on the theoretical basis of GB5 asphalt mixture design in France, a new design method of skeleton embossed asphalt mixture suitable for sieve hole in China is put forward. The feasibility of this method is verified by laboratory test. This paper gives a brief overview of the current mineral aggregate gradation theory and the design method of the mineral aggregate gradation of the framework dense asphalt mixture. According to the maximum density curve theory, the application of fractal theory in the field of asphalt mixture is discussed. In this paper, the correlation of calculating formula parameters is analyzed, and the relationship between them. Superpave gradation design method is established. The American Bayley method, CAVF method and MDBG method both belong to the skeleton dense gradation design method. The theoretical basis of the latter four design methods is particle interference theory. Secondly, the paper systematically introduces the French GB5 asphalt mixture and its design method, and analyzes the boundary action and interference between single particle size aggregate particles. Based on the analysis of the variation of the void ratio of mineral aggregate with the particle size ratio of coarse and fine aggregate, the formula of GB5 gradation design method is analyzed. Thirdly, based on the new skeleton extrusion theory in France and the Superpave rotary compaction instrument, the specimens are prepared. The basic parameters of gradation design are determined, and a new method of design framework dense asphalt mixture is put forward. Finally, high quality basalt and SBS modified asphalt are selected to prepare asphalt mixture. The GB5-13 asphalt mixture designed based on the new skeleton embossing theory and the SMA-13 asphalt mixture obtained by the traditional Marshall design method are compared and analyzed. The indoor 60 鈩，

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