大孔隙排水沥青混合料组成设计及性能研究

【作者】 袁媛；

【导师】 郑南翔；

【作者基本信息】 长安大学 ， 道路与铁道工程， 2005， 硕士

【摘要】 沥青路面的水损害已经成为我国沥青路面的主要病害之一。一旦水进入路面结构层后,最好的办法是在沥青路面结构中设置多孔隙沥青混合料排水层,可迅速排除渗入结构层内的自由水,从而改善路面的工作环境,减轻水损害,延长其使用寿命。 本论文将OGDM-19设置在半刚性基层上,作为排水层,发挥其排水、减少由半刚性基层开裂引起的反射裂缝等优良特性。并对OGDM-19混合料的材料组成及其作为排水层所应具备的特性进行研究。 首先,对OGDM-19混合料的组成进行研究,主要包括:针对作为排水层,沥青标号的选用;引入力学指标抗压回弹模量的沥青用量确定方法。其次,对OGDM-19排水层性能进行研究,主要包括:研究OGDM-19混合料有效空隙率及渗透系数与空隙率的关系;设置OGDM-19排水层前、后的结构应力分析,从结构角度提出对排水层性能要求;不同沥青结合料OGDM-19混合料疲劳特性研究;模拟在动水压力作用下,OGDM-19排水层抗冲刷的能力。最后,对OGDM-19混合料不同水稳性改善措施进行对比。更多还原

【Abstract】 The water damage of asphalt pavement has been one of the uppermost disease in highway. A treated permeable base which is the most effective methods can efficiently intercept and convey water laterally away from the pavement.OGDM-19 asphalt mixture is set on the semi-rigid base as permeable base can make full use of it’s favorable factors, and the OGDM-19 permeable base’s mix design and performance are studied in this thesis.First, the mix design of OGDM Permeable base is presented, which is one of the most important research findings in this thesis. This part includes the following two points. The selection approach of Asphalt grade of OGDM-19 asphalt mixture is given in this area. Moreover, a more reasonable method for determining the optimum bitumen content is provided. Secondly, the Performance of OGDM Permeable base is researched in this dissertation. This part includes the following points. Effective porosity and coefficient permeability can be estimated by two equations in this part. Based on the comparison between the asphalt pavement structure without OGDM-19 and that with OGDM-19, the performance requirement of OGDM-19 is presented. On the basis of the stringer fatigue tests in laboratory, the adhesion of asphalt factors effected on fatigue properties of OGDM-19 permeable base materials is analyzed. Thus, the different measures which can improve the water stability of OGDM-19 permeable base materials are compared.更多还原