Carbonation Behavior of Concrete in Cyclic Wetting-drying Environment

The cyclic wetting-drying environment affects the internal microstructure and durability of hardened concrete. The carbonation behavior of concrete in cyclic wetting-drying condition and standard condition is investigated in this study. The concrete specimens are designed with different contents of mixed mineral and carbonated in different curing condition. The carbonation depth is tested to study the carbonation process in combination of pore structure analysis and microstructural observations. The experimental results show that the carbonation reaction of concrete in cyclic wetting-drying condition proceeds more rapidly. When mixed mineral is added, difference in the curing condition shows less effect on the carbonation behavior of concrete.