沥青混合料高温强度影响因素及提高措施方法研究

Research on Affecting Factors and Improving Methods of Strength in High Temperature of Asphalt Mixture

沥青混合料是一种复杂的多成分构成的材料,性质取决于沥青性质以及矿料与胶结料之间的相互作用等因素。主要分析了沥青混合料内部结构以及强度原理,确定了影响沥青混合料高温强度的两大因素为矿料之间的嵌挤力与摩擦力以及沥青与矿料之间的粘聚力。文章还进行了提高沥青混合料高温强度的方法措施研究,并对几种常规提高沥青混合料粘聚力方法进行了室内试验,总结适合工程实际所需要的合理方法。

Asphak mixture is a complex multi - component material, the property depends on the asphalt property and the interaction between the mineral aggregate and binder. This paper analysed the internal struc- ture and strength principle of the asphalt mixture, identified the two major factors that affecting the high tem- perature strength, they were the friction of mineral aggregate and the cohesive force between the asphalt and mineral aggregate. The paper studied the methods and measures to improve the high -temperature strength of asphalt mixture, and test several methods of improving the cohesive force of asphalt mixture in indoor. At last the reasonable methods of engineering practice were summarized.