15:30 〜 15:45
[2K08] 950keV/3.95MeV可搬型X線/中性子源で高速道路PC橋の点検
キーワード：X-ray, Nondestructive test, Linear Accelerator, Bridge Inspection, Structural Analysis
The 950keV and 3.95MeV portable LINAC-based X-Ray source is applied to cut-samples from a particular highway PC bridge in Japan. The advanced flat-panel detector adopts a longer data stacking time. For the first time, the inner structure of the 570mm-thick PC concrete, which is the typical thickness for highway PC bridges, is successfully visualized. The use of X-ray mesh collimators reduces soft X-ray scattering noises, which improves the X-ray image quality. Grout-filling flaws inside the PC sheath could be confirmed through the visualization as well. The guideline was proposed to a real PC bridge and maintenance could be applied based on the inspection result, and the thickness of the concrete and the rod diameters were also calculated.