有腹筋混凝土构件的再碱化试验研究

Experiment Research on Realkalization Technique for Carbonated Concrete Members with Stirrups

通过对有腹筋混凝土构件的再碱化试验,从钢筋配置方式、钢筋类别差异等角度对再碱化过程及碱化效果进行了分析研究。结果表明:再碱化过程中,电源从钢筋笼的任何位置接入试件对再碱化效果的影响基本没有区别;再碱化过程是电化学、电渗以及扩散相互结合、共同作用的过程;再碱化对纵筋和箍筋都具有良好的修复效果,而且不因钢筋所处位置、钢筋尺寸以及钢材种类等因素不同而改变。

A series of realkalization experiments were carried out on carbonated concrete members with stirrups. In these experiments, the locations and types of rebars were taken into consideration to evaluate the realkalization effects. Results show that during the realkalitation process, it makes no difference in realkalization effects whether the direct current is applied to rebar cage through longitudinal reinforcements or stirrups; realkalization process is the cooperation among electrolysis, electroosmosis and diffusion; excellent realkalization effects are achieved both in longitudinal reinforcements and stirrups no matter the location, dimension or types of rebar are embedded.