2014 Fiscal Year Final Research Report
Image diagnosis based on characteristics of microstructure in deterioration and restoration processes of concrete
| Project/Area Number |
24560564
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Civil engineering materials/Construction/Construction management
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| Research Institution | Kanazawa University |
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Principal Investigator |
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| Project Period (FY) |
2012-04-01 – 2015-03-31
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| Keywords | 画像解析 / 空間統計量 / 点過程 / 電気伝導率 / 中性化 / けい酸塩系表面含浸材 / 超吸水性ポリマー |
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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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| Free Research Field |
土木材料
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