国产塔河沥青混合料矿料级配研究

Research on Aggregate Gradation of Tahe Asphalt Mixture

利用分形理论评价了塔河沥青混合料矿料级配性质,研究了沥青混合料级配的分形理论表征方法,分析了分形维数D与最大密度曲线理论中n值的关系,研究了塔河沥青混合料级配分形维数与最佳沥青用量、车辙动稳定度和冻融劈裂等指标的关系。研究结果表明矿料级配分形维数D与最大密度曲线理论中n值的关系为:D=3-n。当级配曲线没有交叉时,分形维数D能够定量表征连续级配的粗细程度,分形维数D与车辙试验的动稳定度、抗水稳定性能的TSR具有较好的相关性。

With the theory of the distributing fractal geometry, this paper analyses the properties of the gradation of Tahe asphalt mixture. The relationship between D and N in the theory of distributing fractal, and maximum density curve is analyzed. And the relationship between the road performance and the distributing fractural dimension of aggregates gradation is analyzed. The present test results show that there is a rdationship between the two theories, When gradation curves are not crass, the distributing fractat dimension can depict aggregate gradation in quantity. The good correlation between the distributing fractal dimension and the road performance, such as the dynamics stability and TSR, is obtained. When a gradation curve is cross, the correlation between the road performance and the D is poor.