Multi-scale monitoring of degradation process of reinforced concrete

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This research aims at developing the technique to track degradation process of reinforced concrete(RC) by using digital image correlation(DIC). In addition, combination of the developed method and microscopic observation gives "multi-scale monitoring" which can measure the damage of RC from microscopic level to macroscopic one. Alkali-silica reaction and steel corrosion were focused as the degradation of RC. The result of the experiment showed that DIC is promising tool to evaluate the degradation of RC. Multi-scale monitoring also enables to associate the macroscopic degradation process with the microscopic damaging process which can contribute to clarification of the degradation mechanism of RC. Finally, the combination of DIC and multi-rosette analysis showed one possibility to evaluate the induced strain in concrete due to ASR expansion.