一种沥青混合料间断级配新型数学模型

发布时间：2018-08-03 14:08

【摘要】：基于沥青混合料级配间断性评价指标当量粒径比,分别结合代表级配偏粗、居中和偏细的3种函数模型——指数函数模型、幂函数模型和对数函数模型,分析4.75 mm通过率和2.36 mm粒径含量双因素与当量粒径比的关系,改进原有当量粒径比与4.75 mm通过率单因素非线性公式。研究结果表明:当量粒径比与2.36 mm粒径含量符合幂函数模型;4.75 mm通过率与2.36 mm粒径含量对当量粒径比的权重比为60%∶40%;将4.75 mm通过率和2.36 mm粒径含量分别与当量粒径比进行回归,两者回归系数的统计关系式有所不同。以16 mm公称最大粒径沥青混合料为例,验证了该新型级配间断性模型不仅符合评价指标的定义,而且计算结果更加准确。
[Abstract]:Based on the equivalent particle size ratio of asphalt mixture gradation evaluation index, three function models, i.e. exponential function model, power function model and logarithmic function model, which represent coarse, middle and thin gradation of asphalt mixture, are combined, respectively. The relationship between the double factors of passing rate of 4.75 mm and the content of 2.36 mm particle size and the ratio of equivalent particle size is analyzed, and the single factor nonlinear formula of the original equivalent particle size ratio and 4.75 mm passing rate is improved. The results show that the ratio of equivalent particle size to 2.36 mm particle size is in accordance with the power function model. The weight ratio of 4.75 mm passing rate and 2.36 mm particle size content to equivalent particle size ratio is 60: 40, and 4.75 mm passing rate and 2.36 mm particle size content are respectively equal to equivalent. The particle size ratio is regressed, The statistical relationship between the two regression coefficients is different. Taking the 16 mm nominal maximum particle size asphalt mixture as an example, it is verified that the new gradation discontinuity model not only accords with the definition of evaluation index, but also has more accurate calculation results.
【作者单位】：重庆交通大学土木工程学院;重庆交通大学材料科学与工程学院;交通运输部公路科学研究院道路结构与材料交通行业重点实验室;
【分类号】：U414

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