Packing theory-based framework to evaluate permanent deformation of unbound granular materials
Packing theory-based framework to evaluate permanent deformation of unbound granular materials
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DOI：
10.1080/10298436.2012.736620
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发表时间：
2013-02
影响因子：
3.8
通讯作者：
Tatek Fekadu Yideti;B. Birgisson;D. Jelagin;A. Guarin
中科院分区：
文献类型：
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作者：
Tatek Fekadu Yideti;B. Birgisson;D. Jelagin;A. Guarin
非结合粒料的永久变形对路面结构的长期性能起着至关重要的作用。非结合颗粒材料的稳定性由系统的颗粒与颗粒之间的接触、颗粒尺寸分布和堆积排列来定义。本文提出了一种基于堆积理论的级配模型，用于评价松散粒料的永久变形。通过使用来自不同国家的10种未结合的颗粒材料对框架进行评价。介绍了决定二级结构（SS）破坏一级结构（PS）能力的破坏势。本研究还确定了PS和SS的量，最终可用作未结合路面永久变形的设计参数。颗粒材料的永久变形行为的模型的评价被认为是比较有利的实验结果。
Permanent deformation of unbound granular materials plays an essential role in the long-term performance of a pavement structure. Stability of unbound granular materials is defined by the particle-to-particle contact of the system, the particle size distribution and the packing arrangement. This paper presents a gradation model based on packing theory to evaluate permanent deformation of unbound granular materials. The framework was evaluated by using 10 unbound granular materials from different countries. The disruption potential, which determines the ability of secondary structure (SS) to disrupt the primary structure (PS), is introduced. This study also identified the amount of PS and SS that may eventually be used as a design parameter for permanent deformation of unbound road layers. The evaluation of the model regarding permanent deformation behaviour of granular materials is found to compare favourably with experimental results.