| 摘要: |
| 为对室内外老化条件下沥青混合料的动态模量特征进行比较和评价，按照北京市五环路上、中、下3个面层的结构与材料类型，在室内成型SMA 16，AC 25，AC 30沥青混合料试件，分别进行不同老化程度下的间接拉伸疲劳试验，根据时温等效原理建立不同老化程度沥青混合料的动态模量主曲线，并与室外自然老化13a的沥青路面芯样进行对比，研究室内外老化的关系.结果表明：老化效应对沥青混合料动态模量的影响随试验温度升高而逐渐增强；沥青混合料动态模量对老化效应的敏感程度依次为：AC 25>AC 30>SMA 16；间接拉伸试验条件下3种沥青混合料室内外老化的动态模量主曲线差异不大，可以通过室内老化试验对室外路面沥青混合料的动态模量进行评价. |
| 关键词: 沥青混合料 动态模量 间接拉伸 老化效应 主曲线 |
| DOI：103969/j.issn.1007 9629201706018 |
| 分类号: |
| 基金项目:国家自然科学基金资助项目（51478021）；北京市科技计划项目（Z161100004516014）；北京市自然科学基金重点项目（KZ201510005002） |
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| Dynamic Modulus Evaluation of Indoor and Outdoor Aging Asphalt Mixture |
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ZHANG Jinxi, JIANG Fan, WANG Chao, SONG Bo
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Beijing Key Laboratory of Traffic Engineering, Beijing University of Technology, Beijing 100124, China
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| Abstract: |
| In order to compare and evaluate the dynamic modulus of aged asphalt mixture obtained in room and field pavement, the asphalt mixture specimens were prepared according to the materials of upper, middle and lower layers of the fifth ring road in Beijing. Indirect tensile dynamic modulus tests were carried out under different aging degrees. Based on the time temperature equivalence principle, the dynamic modulus master curves of specimens under different aging degrees were established and compared with the field core specimens. Results show that the effect of aging on the dynamic modulus of asphalt mixtures gradually increased with the increase of temperature. The comparative analysis of the dynamic modulus of the three asphalt mixtures with different aging degrees indicates that the sensitivity of the dynamic modulus of asphalt mixtures to the aging effect is AC 25>AC 30>SMA 16 in turn. There is not much difference between indoor and outdoor aging asphalt mixture dynamic modulus master curves in the indirect tensile dynamic modulus test, pavement asphalt mixture dynamic modulus can be evaluated by laboratory test. |
| Key words: asphalt mixture dynamic modulus indirect tension aging effect master curve |
