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间歇式拌和楼二次筛分生产合成级配矩阵模型及参数研究

DOI: 10.3969/j.issn.1674-0696.2014.06.15, PP. 68-78

Keywords: 道路工程,级配模型,合成级配,沥青混合料,路面,roadengineering,gradationmodel,syntheticgradation,asphaltmixture,pavement

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Abstract:

:？沥青混合料生产级配具有变异性，其动态规律分析有赖于基于过程机理的计算模型。拌和楼内集料经历冷料合成-风选分离-二次筛分-热料合成4个阶段，其中两次分离结果的算法是建立生产级配模型的关键。用通过率向量描述集料级配，利用生产试验研究粉尘级配与除尘量变化规律，并以此计算热提料级配；通过二次筛分假设建立各规格热料级配算法，并用热筛统计数据分析参数取值，最后进行模型验证和应用。研究表明：试验工况下浇注式混合料的除尘量占上料总质量的7.6%~13.5%，粉尘级配与除尘量无关；上层筛网筛分效率低于下层筛网，混合料粒径越大则筛分效率越低；热料粒径越小则粉尘附着量越大；按模型计算的生产级配与2种现有方法差异不大；适用于不同生产参数的级配变化规律分析。

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