ABSTRACT
This paper describes chloride migration coefficient and hydration heat generation properties of concrete composed of various types of cement and mineral admixture with the water-cementitious materials ratio ranging from 0.30 to 0.40. Slag cement and low heat cement were effective in reducing the hydration heat compared with normal portland cement but the low heat cement had negative influence on the chloride migration property. As for the mineral admixtures, fly ash was effective in reducing the hydration heat, and both silica fume and meta kaolin were able to increase the compressive strength and reduce the chloride migration coefficient significantly. The experimental results showed that the concrete composed of three kinds of binder (normal portland cement + 20% fly ash + 10% silica fume) led to the reduction of the maximum temperature from 37 ~ 43°C to 33 w 35°C and the chloride migration coefficient from 9.1 < 11.7 X 10-12m2/sto 2.0 ~ 3.8 X 10-12m2/s as compared with the plain concrete (W/Cm 0.30~0.40).
