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二元混合矿料间隙率填充取代复合模型
Voids Model of Binary Mineral Aggregate Based on Filling and Replacing
投稿时间:2018-09-11  修订日期:2018-11-15
DOI:103969/j.issn.1007 9629201906008
中文关键词:  道路工程  堆积密度  干涉理论  级配理论  体积参数
英文关键词:highway engineering  packing density  interference theory  gradation theory  volume parameter
基金项目:
  
作者单位
刘克
LIU Ke
重庆市智翔铺道技术工程有限公司,重庆400067
Chongqing Zhixiang Paving Technology Engineering Co., Ltd., Chongqing 400067, China
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中文摘要:
      为计算2种矿料在任意掺配率下的空隙率(ε),提出了二元混合矿料间隙率填充取代复合模型.将ε与细料质量分数(Pf)的函数关系分为填充、过渡和取代3段,混合机制量化为填充、干涉、取代和壁效应4种;在沥青混合料CAVF设计法的体积方程中叠加干涉项后,用于描述上述函数关系的填充段和过渡段;取代作用与壁效应叠加后,用于描述上述函数关系的取代段.结果表明:干涉的实质是细料取代粗料,用于干涉和填充的Pf值按常量k分配,其常用区间为[058,064];壁效应可解释为粗料组合取代细料,发挥壁效应和取代作用的粗料质量分数分配常量为w;k,w越大则矿料填充、取代作用越显著,εPf曲线斜率越大.模型计算结果与3次实测值基本相符,研究成果可以丰富现有的矿料级配理论.
英文摘要:
      In order to calculate the void(ε) of two kinds of aggregates with arbitrary mixing ratio, the functional relations between ε and fine material mass fraction(Pf) were divided into three sections:filling, transition and replacement. The mixing mechanism was quantified into four kinds:filling, interference, replacing and wall effect. The interference term was added to the volume equation of asphalt mixture CAVF design to describe the filling section and transition section. The replacing effect and wall effect was used to describe the replacement section. An example was taken to test the model and analyze the model parameters. The results show that the essence of interference is that coarse aggregate is replaced by the fine aggregate, and the fine aggregate mass is responsible for the interference and filling is distributed according to constant k, and its common intervals is[058, 064]. The wall effect can be interpreted as the replacement of fine aggregate by combined coarse aggregate, and the mass distribution constant of coarse aggregate with wall effect and replacing is w. The larger the k and w, the more significant the filling and replacing effect, and the larger the slope of ε Pf curve. The model predictions are basically consistent with the measured values, and the research results can enrich the theory of mineral aggregate gradation.
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