沥青混合料的基本参数对其高低温性能的影响

Influence of basic parameters on high and low temperature performances of bituminous mixture

沥青混合料的结构和参数决定了沥青路面的路用性能。将沥青类型、级配、级配的4.75mm、2.36 mm的通过率以及粉油比等作为沥青混合料的基本参数,从混合料的宏观特点出发,用试验的方法揭示各项基本参数对混合料高低温性能的影响及变化规律。结果表明:沥青的变化和结构的调整对其温度稳定性影响相当大;随着4.75 mm通过率和2.36 mm通过率的增大,沥青混合料的高低温性能趋差;粉油比应在不同类型中加以综合考虑。

The parameters and structure of bituminous mixture determine the performances of asphalt pavement. Taking the types of asphalt, the grade of mixture, the 4.75 mm passing percentage, the 2.35 mm passing percentage, and the ratio of powder to oil as the basic parameters, a lot of tests are carried out to reveal the influence of those basic parameters on the performances of asphalt pavement at low and high temperature. The results show that the types of asphalt and the change of mixture structure have a great influence on the performances of pavement. With the increase of 4.75 mm and 2.35 mm passing percentage, the performances of bituminous mixture will dicrease; the influence of the ratio of powder to oil must be considered in different structure. 1 tab, 12 figs, 6 refs.