Development of visualization technique relating to physical property for the diagnosis of concrete structure

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Concrete is a primary construction material and hence has been used for varied types of structural members under diverse environments. It has been found that some concrete structures exhibit deterioration with cracks and alteration. For upgrading these degraded concrete the technology of diagnosis needs to be further developed first so that one can take next proper action for repairing.Visualization technique is now popular because rational evaluation can be made through image analysis and similar methods. To do so a X-ray Computed Tomography (XRCT) is considered promising tool. It can enable to obtain three dimensional images of internal microstructure and cracks. Then this research aims to clarify the capacity of the XRCT using mortar specimens. It was found that the 3D crack image could be obtained and the crack geometry such as crack width distribution with 10 micrometers or larger was quantified.