花岗岩矿料与沥青交互作用能力的研究

Interaction capability of granite aggregate and asphalt

为了找出影响花岗岩沥青混合料水稳定性的主要因素,使花岗岩大规模应用于沥青路面,本文采用动态剪切流变仪(DSR),对不同花岗岩石粉、不同粉胶比条件下的沥青胶浆进行流变性能的研究,以此分析不同花岗岩与沥青交互作用能力.研究发现不同沥青与石粉产生的交互作用能力有所不同.因此,应用花岗岩时在材料选择方面应该注意与花岗岩的"配伍性"问题.通过冻融劈裂试验检验沥青混合料水稳定性与沥青和石粉交互作用能力之间的关系,发现花岗岩沥青胶浆的流变学性质与花岗岩沥青混合料水稳定性之间存在良好的对应关系.

In order to find the main factor influencing the water stability of asphalt mixture and make it possible for the large-scale use of granite aggregate in asphalt pavement, the rheological property of asphalt mastic mixed with different granite powders and different ratios of filler to asphalt was studied using dynamic shear rheometer. The result shows that the interaction capability is different with different granite powders and asphalt. So the compatibility of granite and asphalt should be considered in the choice of materials. A freeze thaw split test was conducted to verify the relationship between the water stability of granite asphalt mixture and the interaction capability of granite and asphalt. It is indicated that there is a good corresponding relationship between the rheological property of asphalt mastic and the water stability of asphalt mixture.