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首页> 外文会议>Airfield and Highway Pavement Specialty Conference; 20060430-0503; Atlanta,GA(US) >Characterization of Asphalt Materials using X-ray High-Resolution Computed Tomography Imaging Techniques
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Characterization of Asphalt Materials using X-ray High-Resolution Computed Tomography Imaging Techniques

机译：使用X射线高分辨率计算机断层扫描成像技术表征沥青材料

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摘要

X-ray Computerized Tomography (CT) has emerged as a powerful, nondestructive tool to study and quantify the three-dimensional internal structure of HMA. Studies, in conjunction with modeling and computational techniques, have focused on characterization of HMA internal air-void distribution, internal structure evolution during laboratory compaction, damage evolution in specimens during laboratory tests, segregation analysis, forensic investigation of pavements using cores, and the quantification of HMA microstractural properties. The Center for Nondestructive Evaluation (CNDE) at Iowa State University (ISU) has an in-house built high-resolution CT system with customized software for data acquisition, volumetric file reconstruction, and visualization. Preliminary studies were conducted at the CNDE to investigate the capabilities and resolution levels of the imaging systems in studying asphalt materials. Researchers at both ISU and Iowa Department of Transportation are currently using the advanced imaging facilities available at the CNDE and the latest developments in image analysis techniques to develop a deeper understanding of the HMA internal structure, develop and optimize the various parameters that describe the internal structure and relate them to the performance of pavements in a scientific way. This will provide the foundations to building more durable and long-lasting pavements.
机译：X射线计算机断层扫描（CT）已成为研究和量化HMA三维内部结构的强大，无损工具。结合建模和计算技术的研究集中在HMA内部气孔分布的表征，实验室压实过程中内部结构的演变，实验室测试过程中试样的损伤演变，偏析分析，使用岩心的路面法医研究以及量化方面HMA显微结构特性。爱荷华州立大学（ISU）的无损评估中心（CNDE）拥有内部构建的高分辨率CT系统，该系统具有用于数据采集，体积文件重建和可视化的定制软件。在CNDE上进行了初步研究，以研究成像系统研究沥青材料的能力和分辨率水平。 ISU和爱荷华州交通运输部的研究人员目前正在使用CNDE上提供的先进成像设施以及图像分析技术的最新进展，以加深对HMA内部结构的了解，开发和优化描述内部结构的各种参数。并以科学的方式将它们与人行道的性能联系起来。这将为建造更坚固耐用的路面奠定基础。

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