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为了研究掺加橡胶颗粒的沥青混合料级配分形特征及其与高温性能的关系,采用分形理论计算了掺加橡胶颗粒的AC-16沥青混合料集料级配分形维数D;根据车辙试验结果,建立了其与动稳定度之间的回归关系;通过进一步计算二重分形维数,回归得到了粗、细集料分形维数与动稳定度的关系。研究结果表明:橡胶颗粒沥青混合料的集料分形维数与动稳定度之间具有较好的线性相关性,且粗集料分形维数对高温稳定性影响较大;要满足沥青混合料的动稳定度大于800次/mm的要求,整体集料分形维数不宜大于2.53,粗集料分形维数不宜大于2.66。
In order to study the gradation characteristics of graded asphalt mixture with rubber particles and its relationship with high temperature performance, fractal theory was used to calculate the fractal dimension D of aggregate gradation of AC-16 asphalt mixture with rubber particles. According to the rutting test As a result, the regression relationship between dynamic stability and dynamic stability was established. By calculating the double fractal dimension, the relationship between the fractal dimension of coarse and fine aggregates and the dynamic stability was obtained by regression. The results show that there is a good linear correlation between the aggregate fractal dimension and the dynamic stability of the rubber asphalt mixture and the fractal dimension of the coarse aggregate has a great influence on the stability at high temperature. To meet the requirements of asphalt mixture Dynamic stability greater than 800 times / mm requirements, the overall aggregate fractal dimension should not be greater than 2.53, the coarse aggregate fractal dimension should not be greater than 2.66.