| 基于沥青混合料各组分密度的内部结构均匀性分析 |
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| 引用本文： | 郭乃胜,王聪,赵颖华,谭忆秋,尤占平.基于沥青混合料各组分密度的内部结构均匀性分析[J].工程力学,2016,33(7):249-256. |
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| 作者姓名： | 郭乃胜 王聪 赵颖华 谭忆秋 尤占平 |
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| 作者单位： | 1.大连海事大学道路与桥梁工程研究所, 辽宁, 大连 116026; |
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| 基金项目： | 国家自然科学基金项目(51308084);中央高校基本科研业务费专项资金项目(3132014223) |
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| 摘 要： | 为了有效地测试和评价沥青混合料内部结构均匀性,应用X-ray CT技术和数字图像处理方法,考虑粗集料、砂浆和空隙各组分的作用,提出了一种基于沥青混合料各组分密度的内部结构均匀性识别方法,选用4组不同油石比的沥青混合料试件,利用该方法对其内部结构均匀性进行了分析。结果表明:基于该方法提出的均匀性评价参数可以识别单一或一组沥青混合料试件的内部结构均匀性,并且通过分析计算得到沥青混合料的最佳油石比与室内试验获得的相差0.21%,这表明均匀性识别方法的有效性。
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| 关 键 词： | 道路工程 沥青混合料 数字图像 均匀性 X-ray CT 密度 |
| 收稿时间： | 2014-12-18 |
HOMOGENEITY OF INTERNAL STRUCTURE OF ASPHALT MIXTURES BASED ON DENSITY OF INCLUSIONS |
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| Affiliation: | 1.Road and Bridge Engineering Institute, Dalian Maritime University, Dalian, Liaoning 116026, China;2.School of Transportation Science and Engineering, Harbin Institute of Technology, Harbin, Heilongjiang 150090, China;3.Department of Civil and Environmental Engineering, Michigan Technological University, Houghton, Michigan 49931, USA |
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| Abstract: | The objective of this study is to test and evaluate the homogeneity of internal structure of asphalt mixtures effectively. A homogeneity identifying method based on the density of inclusions (HIMDI) of asphalt mixtures is put forward which uses X-ray CT techniques and digital image processing to consider the interaction of coarse aggregate, mastics, and air voids. Asphalt mixture specimens including four groups of asphalt-aggregate ratios are used to analyze the homogeneity of the internal structure of the specimens using the HIMDI. The results show that the homogeneity of internal structures of single or a set of asphalt mixtures specimens can be characterized through analyzing the homogeneity evaluation parameters proposed by the HIMDI, and the difference between the optimum asphalt-aggregate ratio of asphalt mixtures calculated by the HIMDI and the test result is 0.21%. This means that the HIMDI is an effective method with acceptable precision in analyzing homogeneity of internal structure of asphalt mixtures. |
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