【作者】 苏春华；

【导师】 沙爱民；

【作者基本信息】 长安大学 ， 道路与铁道工程， 2011， 硕士

【摘要】 大粒径沥青碎石混合料具有良好的抵抗反射裂缝和抗车辙的能力,可有效解决半刚性沥青路面常见的开裂和高温变形等问题。本文参照国内外对大粒径沥青碎石混合料的研究成果,针对模拟现场振动压路机的工作状况的室内振动成型方法应用较少,尤其用于大粒径沥青碎石混合料室内振动成型更少,对大粒径沥青沥青碎石混合料组成设计和室内振动成型试验方法进行研究。首先,本文分析了大粒径沥青碎石混合料的组成结构特性和强度构成机理,同时还介绍了逐级填充理论,并根据逐级填充理论采用多级嵌挤级配设计方法,分别对粗、细集料的级配组成进行设计,然后进行粗、细级配的理论合成计算,最终提出了具有嵌挤骨架密实结构的级配。其次,分别利用大马歇尔击实试验和振动成型击实试验确定大粒径沥青碎石混合料最佳沥青用量。其中,重点介绍了振动压实成型试验方法,它是利用实验室内自行研制的振动成型击实机,对大粒径沥青碎石混合料进行不同配置条件下的振动试验,找出—套适用于大粒径沥青碎石混合料的最佳振动组合参数。然后在最佳振动组合参数条件下进行混合料配合比设计。最后,进行振动成型击实试验与大马歇尔击实试验的比较分析。第一,对两种成型方法后试件各种物理指标方面的进行对比；第二,对两种成型方式后的试件进行抽提试验,并对试验后集料级配破碎状况作对比；第三,两种方法的击实功做比较。更多还原

【Abstract】 The large stone asphalt mixture (short for LSAM) has the good properties of eliminating the reflect crack and resistance the rutting, it can effectively solve these problems of semi-rigid asphalt pavement, such as cracking and high temperature deformation. This article refers to the research result of LSAM at home and abroad, directed against the lack of the application on laboratory vibratory molding method that can simulate field vibratory compaction of vibratory roller, especially when this method is applied to LSAM, the laboratory experiment based on design and vibratory compaction method of LSAM treated base has been researched.At first, this paper analyses the composition and intensity mechanism of LSAM, and introduces the grading filler theory, according to it and based on multi-grade stone-to-stone theory, gradation composition of coarse and fine gradation is designed, and then they are calculated by combining. At last, gradation with the skeleton dense built-in structure is addressed.Secondly, large scale Marshall Compaction test and vibratory molding method are used to ascertain asphalt content of LSAM. The laboratory vibratory molding method is emphsised, which is based on the self-developed vibratory molding machine and under different of allocation conditions, in order to find out the optimum combination of vibratory parameters for LSAM. Then mixture proportioning design is discussed under the optimum combination of vibratory parameters,Last, the vibratory molding test and the large scale Marshall Compaction test are compared. First, various of physical indexes of specimens after formed by the vibratory molding test and the large scale Marshall Compaction test are compared; second, the extraction test has been applied to the mixture specimens under vibratory compaction and Marshall Compaction, then the crushing condition of aggregate grading after the extraction test is compared. Third, the compaction of the two methods is discussed.更多还原