北美岩沥青改善混合料性能的实验研究

Experimental on Improving the Performance of Mixtures by North American Rock Asphalt

为评价北美岩沥青对沥青混合料的改善作用,增强对天然沥青在路面运用情况和微观机理的研究,从宏观角度开展北美岩沥青改性机理的实验分析,同时从微观角度采用红外光谱实验分析、差热扫描、扫描电镜法,研究北美岩沥青的改性机理。研究得出北美岩是筛分目数很细的粉末材料,与沥青性质相差不大,只是形态上有所不同,沥青加热温度要求不高,产生废料的几率小,北美岩改性混合料能有效延长沥青道路的使用寿命。且具备较大的直接经济性,对道路的发展有着深远的意义。

In order to evaluate the improvement effect of North American rock asphalt on asphalt mixtures,and enhance the research on the use of natural asphalt on pavement and micro-mechanism,carries out the experimental analysis of the modified mechanism of North American rock asphalt from a macro perspective,and uses infrared spectroscopy experiments from a micro perspective.Analysis,differential thermal scanning,and scanning electron microscopy to study the modification mechanism of North American rock asphalt.The study shows that North American rock is a powder material with a very fine sieve mesh.It is not much different from asphalt in properties,but is different in form.The asphalt heating temperature is not high,and the probability of generating waste is small.The North American rock modified mixture can effectively extend the service life of asphalt roads.And it has a greater direct economy,which has far-reaching significance to the development of the road.