Influence of compaction direction on performance characteristics of roller-compacted HMA specimens
Influence of compaction direction on performance characteristics of roller-compacted HMA specimens
复制标题
压实方向对碾压HMA试件性能特征的影响
DOI：
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
A. Alisov
中科院分区：
文献类型：
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作者：
B. Hofko;R. Blab;A. Alisov
热混合沥青（HMA）板碾压生产的可用于岩心和切割样品进一步测试。压实方向与实验室试验之间的关系并不总是与现场压实方向与实际载荷之间的关系相同。本文介绍了压实方向对碾压HMA试件性能特性影响的研究结果。通过基于性能的试验方法，包括高温、刚度、疲劳和低温试验，获得了基层混合料的性能参数。压实方向与试样试验之间的关系在三个维度上都有所变化，以找出相关的影响。结果表明，得到的所有性能参数都对材料因压实作用而产生的各向异性敏感，尤其是刚度和疲劳性能。在高温性能方面，比较了路径控制和力控压实的试样。施加的压实功而不是压实方法与相应结果的差异有关。压实的均匀性反映在试样容重变化上，反映在试验结果的散射上。
Hot mix asphalt (HMA) slabs produced by roller compaction can be used to core and cut specimens for further testing. The relation between the direction of compaction and testing in the laboratory is not always the same relation as it is between the direction of compaction and actual loading in the field. This paper presents outcomes of a study analysing the influence of the compaction direction on performance characteristics of roller-compacted HMA specimens. Performance parameters of a base layer mix are obtained from performance-based test methods, including high-temperature, stiffness, fatigue and low-temperature tests. The relation between direction of compaction and specimen testing is varied in all three dimensions to find relevant influences. From the results, it can be concluded that all obtained performance parameters are sensitive to the anisotropy of the material due to compaction, especially for stiffness and fatigue performance. For the high-temperature performance, specimens from path- and force-controlled compaction were compared. The applied compaction work rather than the compaction method is linked to the difference in the corresponding results. The uniformity of the compaction in terms of the variation of bulk density of the specimens reflects on the scattering of test results.