| Budget Amount *help |
¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
Fiscal Year 2014: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2013: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2012: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
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| Outline of Final Research Achievements |
Deterioration and restoration processes of concrete were examined by image analysis. Coarse capillary pore structures were not greatly changed by carbonation. Surface treatments with silicate-based penetrants also did not change the visible pore structures. Nevertheless, electrical conductivity of concrete was significantly changed by carbonation and the surface treatment. The relevant changes in microstructure occur at observation levels smaller than the resolution of images. Coupling the SEM examination with electrical conductivity testing is useful for the image diagnosis of concrete. Images acquired at low magnifications were also used for the diagnosis. Superabsorbent polymer particles (SAP) and air bubbles were well distinguished from the cement paste matrix in mortar images, which were taken by a flatbed scanner. Regardless of magnifications and means for obtaining segmented images, the point process statistics is quite useful for quantitative evaluation of those particles.
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