Godoi W C, Coraiola G, Junior S Ribeiro, Swinka-Filho V, de Geus K, Portella K Franke, Medeiros B L, Cunha de Andrade F, Hönnicke M G
Universidade Tecnológica Federal do Paraná, 80230-901, Curitiba, PR, Brazil.
Universidade Federal do Paraná, 81531-980, Curitiba, PR, Brazil.
Heliyon. 2019 Apr 9;5(4):e01467. doi: 10.1016/j.heliyon.2019.e01467. eCollection 2019 Apr.
A simple solution to improve the contrast between the different concrete composites in X-ray imaging (radiography and tomography) of a highly compressed composite sample of real size roller compacted concrete (RCC) specimens is presented. This is made by applying a 9.5 mm thick Copper (Cu) filter at the output window of the X ray tube in a conventional X-ray inspection equipment. Our results show that with the employed filtration, at 140 kV and 200 kV, we were able to distinguish the gravel from the other concrete composites even in a highly compacted specimen. Cement and sand grains as well as porosity were not detected mainly due to the low spatial resolution of our detector system. This suggests a further improvement by using the now available high voltage microfocus X-ray tube (>= 200 kV), a bow-tie (or through) Cu filters and a high resolution flat panel detector for phase contrast imaging on real size compacted concrete specimens.
本文提出了一种简单的解决方案，用于在实际尺寸的碾压混凝土（RCC）试件高度压缩复合样本的X射线成像（射线照相和断层扫描）中提高不同混凝土复合材料之间的对比度。这是通过在传统X射线检测设备的X射线管输出窗口处应用一个9.5毫米厚的铜（Cu）滤波器来实现的。我们的结果表明，在所采用的滤波条件下，在140 kV和200 kV时，即使在高度压实的样本中，我们也能够将砾石与其他混凝土复合材料区分开来。水泥和砂粒以及孔隙率未被检测到，主要是由于我们的探测器系统空间分辨率较低。这表明通过使用现有的高压微焦点X射线管（>= 200 kV）、蝴蝶结（或穿透式）铜滤波器和高分辨率平板探测器对实际尺寸的压实混凝土试件进行相衬成像，可以进一步改进。
