鋼筋混凝土腐蝕破壞與超音波振幅衰減關聯之研究

Correlation between Corrosion Damage and Amplitude Attenuation of Rebar in Concrete

本研究係利用超音波振幅衰減、開路電位法與直流極化法，量測不同水灰比混凝土中鋼筋腐蝕程度及混凝土之損壞程度，並探討混凝土裂縫對鋼筋腐蝕速率的影響。最後並將電化學測得之腐蝕電位及腐蝕速率與超音波振幅衰減比較，建立其關聯性。

The amplitude attenuation method in ultrasonic testing was used to evaluate the corrosion damage of reinforced concrete members. Open circuit potential and corrosion rate after acceleration corrosion were also measured by electrochemical method. It is found that the nondestructive ultrasonic method shows good performance on corrosion detection for reinforced concrete. The relationship between the average amplitude attenuation and the electrochemical parameters was analyzed and concluded in this study.