An experimental investigation was performed to study factors influencing the chloride penetration resistance of concrete in laboratory-accelerated and outdoor exposure tests. Concrete specimens fabricated with and without supplementary cementitious materials (SCMs) were employed for the rapid chloride migration test, immersion test, and outdoor exposure test. The experimental results obtained from the rapid chloride migration test and immersion test indicated that mixing SCMs contributed to improving the chloride penetration resistance of concrete. Additionally, the rapid chloride migration test was found useful for clarifying the time-dependent development of the chloride penetration resistance of concrete containing SCMs. On the other hand, chloride profiles of the concrete specimens that had been exposed near a coastline in Japan for approximately two years were influenced by carbonation of the specimen surface. The concrete specimens containing high-volume SCMs showed greater chloride penetration than did those made only with ordinary Portland cement. It should be noted that this adverse effect due to the use of high-volume SCMs was not predictable in the conventional laboratory-accelerated tests. |