微粒矿渣掺合料对混凝土中钢筋锈蚀影响的电化学研究

ELECTROCHEMICAL STUDY OF THE INFLUENCE OF FINE SLAG PARTICLES ADMIXTURE ON CORROSION OF REBARS IN CONCRETE

用线性极化法和交流导纳法对微粒矿渣掺合料对混凝土中钢筋锈蚀的影响进行了研究．结果表明，微粒矿渣掺合料的加入可阻止混凝土中钢筋的锈蚀．机理研究表明，微粒矿渣掺合料可改变混凝土的孔结构、降低孔隙率、提高密实性，并可降低氯离子的渗透性．

It is shown in the paper that addition of fine slag particles admixture in cement will significantly inhibit the corrosion of rebars in concrete. Mechanism of the inhibition was studied by electrochemical methods, i.e. measurement of linear polarization and AC impedance. It is proved that inhibition is related to the change of microstructure of concrete and the reduction of permeability of chloride ions in concrete.