加速渗透试验预测混凝土寿命的研究

Study on predicting service life of concrete through accelerated permeability test

主要通过变电压的加速氯离子渗透试验来预测混凝土的寿命,根据不同电压下混凝土中氯离子含量的变化规律,找到加速电压与达到氯离子临界浓度的时间之间的关系,最终预测海水中混凝土自然渗透情况下的寿命。依据对加速渗透试验结果的分析,建立了混凝土结构的寿命预测方程,方程预测的结果与实测数值符合性较好,表明预测方法较为合理。

The service life of concrete structure was predicted through accelerated chlorid ion penetration test under various voltages.According to change rule of chloride ion content in concrete under various voltages,the relationship between critical concentration time and voltage was obtained.Based on the obtained results,the service life of concrete structures in natural marine environment was predicted.Through the analysis of the experimental results of accelerated penetration test,the service life prediction equation of concrete structures was established.The predicted results exhibited good compliance with the measured values,which indicated the reasonableness of the mentioned prediction method.