矿物对混凝土中钢筋锈蚀的试验研究

摘要

By inspecting the changes of rebar potential and corrosion current density, the corrosion rate of rebar embedded in concrete affected by slag and fly ash was studied. The experiment result showed that the rebar corrosion could be retarded by the separate addition of slag and fly ash which improved the resistance of concrete to chloride ion penetration. The change of steel potential coincided with the change of corrosion current density, so they could be used as the criterion for the state of rebar corrosion.%通过检测钢筋电位以及腐蚀电流密度的变化,比较了矿粉、粉煤灰对混凝土中钢筋锈蚀速率的影响.试验结果表明:由于矿粉、粉煤灰能改善混凝土抵抗氯离子渗透的能力,因而能延缓混凝土中钢筋的锈蚀.钢筋电位与腐蚀电流密度的变化情况基本一致,可以作为混凝土中钢筋锈蚀情况的判断依据.