混凝土渗透性概念的细化及其测试方法

Different concepts and the corresponding testing methods of concrete permeability

探讨了混凝土渗透性概念的三种含义及其测试方法,并重点探讨了它们之间的相互关系。根据混凝土渗透性驱动力的种类,将其概念划分为毛细孔压力渗透性、水压力渗透性和浓度差渗透性(或称离子渗透性)三种。重点指出毛细孔压力渗透性与其他两种渗透性之间的相互关系,会随着混凝土孔结构的变化而发生变化。并进一步指出水压力渗透性和氯离子渗透性测试方法的不足,以及两者与毛细孔压力渗透性测试方法之间不确定的相关性。故评价混凝土的渗透性时,应当综合考虑毛细孔压力渗透性与其他两种渗透性。

Three meanings and their corresponding testing methods of concrete permeability are discussed, with great emphasis on the relations among them.There are capillary pressure permeability,hydraulic pressure permeability,and ion permeability （or concentration difference） on the basis of driving forces of concrete permeability.The relativity between capillary pressure permeability and others that changed with pore structure changing in concrete is expounded, the defect of testing methods of hydraulic pressure permeability and chlorin ion permeability is analyzed, and the undefined relativity between capillary pressure permeability and others is studied.Capillary pressure permeability and others must be generally considered when concrete permeability was evaluated.