Fracture mechanics / Investigation of existing structure / Maintenance & Life cycle Ⅰ

[2222] VISUALIZATION OF CORRODED STEEL BARS IN RC BEAMS USING DIGITAL IMAGE PROCESSING OF X-RAY PHOTOGRAMS

Sopokhem LIM¹, Haitao JIANG¹, Takehiro OKAMOTO¹, Mitsuyoshi AKIYAMA² (1.Waseda University, Departoment of Civil and Environmental Engineering 2.Waseda University, Departoment of Civil and Environmental Engineering)

Keywords:RC beam, spatial variability, steel weight loss, surface crack width, X-ray technique, digital image processing

The structural performance of deteriorated RC structures in chloride-contaminated environments depends strongly on local conditions of corrosion-damage reinforcement. Corrosion-induced surface cracking is the only key visible indicator that indicates steel corrosion inside RC members. Therefore, it is crucial to study the spatial variability of steel weight loss in relation to corrosion cracking. This paper demonstrates applications of X-ray techniques and digital image processing to continuously observe the spatial variation of steel weight loss and its relationship with surface crack widths.