Abstract
This paper describes a method of remaining life prediction of aged RC-T girder bridges based on the concrete core test results. The prediction of remaining life of the bridge also can be quantitatively estimated by applying the J-BMS BREX system with the field inspection data. Then it needs to verify through the concrete core tests which extracted from some parts on main girders, deck slabs and bridge piers, such as carbonation depth, chloride ion content, etc. In this paper, two aged bridges(about 70 years old) being demolished were selected for developing a method of remaining life prediction of the bridge in case where the main deterioration factor is carbonation and chloride attack. As a result, a flowchart of the remaining life prediction in the case of the chloride attack is more dominant than the carbonation and the case of the carbonation is more dominant than the chloride attack on deterioration process of the bridges was proposed based on the collected concrete core test results. Furthermore, it has been found that the remaining life for two aged bridges can be predicted accurately based on the proposed method with the accumulated values, 75mg/cm2 of corrosion of reinforcing bar due to both of carbonation and chloride attack.
