Deformation Analysis of Reinforced Concrete using Neutron Imaging Technique
T. Koyama, K. Ueno, M. Sekine, Y. Matsumoto, T. Kai, T. Shinohara, H. Iikura, H. Suzuki, M. Kanematsudownload PDF
We suggest a novel method to observe internal deformation of concrete using a neutron transmission imaging technique. In order to visualize the internal deformation of concrete, cement paste markers containing Gd2O3 powder were dispersed two-dimensionally around the ferritic deformed rebar in reinforced concrete. Displacement of the neutron transmission image of the Gd marker was evaluated by a change in the position of the marker as a function of the travel distance of the vertical sample stage, and it was successfully evaluated to within approximately ±0.1 mm accuracy by analyzing selected markers with higher contrast and circularity. Furthermore, concrete deformation under pullout loading to the embedded rebar was evaluated in the same way and compressive deformation of concrete was successfully observed by analyzing the displacement of the markers. The results obtained in this study bring beneficial knowledge that the measurement accuracy of the marker displacement can be improved by choosing spherical-shaped markers and by increasing the contrast of markers.
Neutron Imaging, Reinforced Concrete, Deformation Analysis, Image Analysis
Published online 4/20/2018, 6 pages
Copyright © 2018 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA
Citation: T. Koyama, K. Ueno, M. Sekine, Y. Matsumoto, T. Kai, T. Shinohara, H. Iikura, H. Suzuki, M. Kanematsu, ‘Deformation Analysis of Reinforced Concrete using Neutron Imaging Technique’, Materials Research Proceedings, Vol. 4, pp 155-160, 2018
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