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In this paper, CO2 amount is evaluated considering repairing timing and unit CO2 amount per repair method including various stage of material manufacturing, moving, and construction. Four mix proportions with mineral admixture are considered and repairing timing/ numbers are simulated based on the results from Life 365 which can handle chloride penetration. Furthermore two repair methods (simple cover concrete replacement and replacement with electro-chemical method for removing chloride content) are considered and the related CO2 emissions are evaluated. From the study, the case with high W/B (water to binder ratio) ratio shows smaller CO2 emission in construction stage but it increases more rapidly with increasing number of repair. CO2 emission considering electro-chemical method greatly increases with the increasing unit CO2 for the repairing method. The numbers of jumping step (repairing number) are evaluated to be 9 for WB37-OPC, 18 for WB50-OPC, 4 for WB40-SG, and 7 for WB47-SG respectively. RC structures with the longer maintenance free period are evaluated to be advantageous for saving CO2 emission.

CO2Evaluation of Reinforced Concrete Column Exposed to Chloride Attack Considering Repair Timing

CO₂Evaluation of Reinforced Concrete Column Exposed to Chloride Attack Considering Repair Timing