偏高岭土对混凝土抗氯离子渗透性能的影响及机理研究

Research on Influences of Metakaolin on Chloride Penetration Resistance of Concrete and Its Mechanism

以偏高岭土作为矿物掺和料,研究了偏高岭土的掺量对混凝土抗氯离子渗透性能的影响,并对其作用机理进行了探讨。结果表明:随着偏高岭土掺量的增加,混凝土的抗压强度和抗氯离子渗透能力增强;偏高岭土中的C_3A与氯离子形成Friedel盐,通过固化作用有效地阻止了氯离子的渗透。

Based on metakaolin as a mineral admixture, the influences of its dosage on chloride penetration resistance of concrete were investigated, and its mechanism was discussed. The experimental results showed that the compressive strength and chloride penetration resistance increased with the increasing of the dosage of metakaolin. Friedel salt was formed by C3A and chloride ion, which could effectively prevent the penetration of chloride ions.