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针对目前缺乏有效评价与预测基层混合料离析方法的问题,在研究混合料颗粒在离析前后的运动方程的基础上,定义基层混合料离析指数L为集料各筛孔分计筛余与相应尺寸颗粒在离析状态下的相对位移的乘积,同时探讨了离析指数与混合料离析趋势之间的关系。并通过计算4种典型级配的基层混合料的离析指数,分析集料级配对基层混合料离析的影响。结果认为:离析指数完全可以表征不同级配对基层混合料的离析影响;在4类典型级配中,悬浮密实型级配的离析趋势较骨架密实型要小,且悬浮密实型级配中正S型级配的离析趋势最小。
In view of the current lack of effective evaluation and prediction of grass-roots mixture segregation method, based on the analysis of the motion of the mixture particles before and after segregation, based on the definition of grass-roots mixture segregation index L for the sieve sieve sieve residue and the corresponding size The product of the relative displacements of the particles in the segregated state is also discussed, and the relationship between the segregation index and the segregation tendency of the mixture is also discussed. By analyzing the segregation index of the four kinds of typical gradation mixture, the influence of aggregate gradation on the segregation of the primary mixture was analyzed. The results show that the segregation index can completely characterize the segregation effect of the grassroots mixture with different grades. The segregation tendency of the suspended dense gradation is smaller than that of the solid skeleton in the four typical gradations, Grading with the trend of the smallest segregation.