ABSTRACT
This research aimed to study the effect of brinewater curing on the compressive strength of concrete containing fly ash (FA) and blast furnace slag (BFS). The water-cementitious ratio was 0.4, The FA and BFS replaced 0%, 30%, and 60% of cement weight, respectively. The concrete specimens were cured by freshwater and brinewater till the ages of 28 and 56 days for testing. Test results showed that the compressive strength of concrete cured by brinewater was higher than that of concrete cured by freshwater, and the compressive strength at 56-day was higher than their strength at 28-day. The compressive strength of concrete with FA was lower than other concretes, and the compressive strength of concrete cured by freshwater or brinewater presented not much difference on 28-day. The strength of concrete with FA cured by brinewater was significantly higher than that of concrete cured by freshwater on 56-day. The BFS concrete had the highest strength, however, it showed no obvious effect for freshwater or brinewater curing on its compressive strength. The compressive strength of concrete with FA/BFS was lower than that of concrete with BFS, but higher than that of control concrete (F00B00). Adding FA and BFS in concrete at the same time can enhance the compressive strength of concrete with sole FA at the age of 28 days.
