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Application of compressible packing model for optimization of asphalt concrete mix design

机译：可压缩填料模型在沥青混凝土配合比优化设计中的应用

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Packing of an aggregate blend is a measure reflecting how solid part and air voids would share the volume occupied by the blend. It is usually measured in terms of "packing density". In this paper, Compressible Packing Model (CPM) is described as a potential technique to optimize aggregate blend by optimizing the packing density in asphalt mixes. Gradation envelops for high-performance asphalt mixes or Enrobe a Module Eleve (EME) were determined for two different mix types (12.5 mm NMAS and 19 mm NMAS) using CPM. Further, asphalt mixes were fabricated using two types of modified asphalt binders. Compactibility and volumetrics of the mixes were assessed. Dynamic modulus test was performed to evaluate the Theological behavior of the mixes at elevated temperatures as well as loading frequencies to develop master curves. Results of this study showed that the gradation limits obtained from CPM were Very close to the grading control points of EME mixes and that the asphalt mixes had higher compactibility than the conventional mix. Dynamic modulus test results also depicted the designed mixes could meet stiffness requirement of EME mixes, and the mixes behaved more elastically. (C) 2017 Elsevier Ltd. All rights reserved.
机译：骨料混合物的填充是一种反映固体零件和空气空隙如何共享混合物所占体积的度量。通常用“堆积密度”来衡量。在本文中，可压缩堆积模型（CPM）被描述为通过优化沥青混合料的堆积密度来优化集料混合的潜在技术。使用CPM为两种不同的混合类型（12.5毫米NMAS和19毫米NMAS）确定了高性能沥青混合料或Enrobe Module Eleve（EME）的级配信封。此外，使用两种类型的改性沥青粘合剂制造沥青混合料。评估了混合物的可压实性和体积。进行动态模量测试以评估混合物在升高的温度下的神学行为以及加载频率以形成主曲线。这项研究的结果表明，从CPM获得的等级极限非常接近EME混合料的等级控制点，并且沥青混合料比常规混合料具有更高的压实性。动态模量测试结果还描述了所设计的混合物可以满足EME混合物的刚度要求，并且混合物表现得更具弹性。 （C）2017 Elsevier Ltd.保留所有权利。

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