| 摘要: |
| 基于沥青混合料的材料组成及分布，采用扫描电镜（SEM）测定热拌沥青混合料中集料表面裹附的沥青膜厚度，并提出一种拌和和易性评价指标.采用集料分布均匀性和压实度测试结果进一步验证和分析不同热拌沥青混合料拌和和易性的变化规律.结果表明：沥青种类、级配类型及拌和温度对热拌沥青混合料拌和和易性影响作用不同；沥青膜在集料表面裹附得越均匀，热拌沥青混合料的拌和和易性就越好，集料分布的离散性越小，热拌沥青混合料成型的压实度越大. |
| 关键词: 道路工程 热拌沥青混合料 拌和和易性 沥青膜厚度 压实度 |
| DOI：10.3969/j.issn.1007-9629.2024.03.012 |
| 分类号:U414 |
| 基金项目:国家自然科学基金资助项目（52278451）； 江苏现代路桥有限公司科技项目（2021JKY18） |
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| Mixing Workabilty Evaluation Method of Hot Mix Asphalt Mixture |
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DONG Fuqiang1, ZU Yuanzhe1, ZHU Qiyang2, LIU Lin2, WANG Haijun2
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1.School of Civil and Transportation Engineering， Hohai University， Nanjing 210098， China;2.Jiangsu Xiandai Road & Bridge Co.， Ltd.， Jiangsu Communications Holding Co.， Ltd.， Nanjing 210002， China
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| Abstract: |
| Based on the material composition and distribution of asphalt mixtures， scanning electron microscopy （SEM） was used to determine the thickness of the asphalt film wrapped around the aggregate surface in hot mix asphalt mixtures， and to propose a mixing workability evaluation index. Then the changes of mixing workability in different hot mix asphalt mixtures were further verified and analyzed through the index of aggregate distribution and compaction. The results show that the type of asphalt， gradation type， and mixing temperature have different effects on the mixing workability of hot mix asphalt mixtures. The better the uniformity of asphalt film attachment to the aggregate surface， the better the mixing workability of hot mix asphalt mixtures， the less discrete the aggregate distribution， the greater the compaction of the hot mix asphalt mixtures molding. |
| Key words: road engineering hot mix asphalt mixture mixing workability asphalt film thickness compaction |
