Effects of CO2 surface treatment on strength and permeability of one-day-aged cement mortar

Many of the degradation problems of concrete can be attributed to the weak surface layer. Surface treatment of concrete has been proven a simple and effective method to enhance the durability of concrete. In the present study, two series of portland cement mortar specimens with w/c ratios of 0.4 and 0.3 were prepared. CO2 treatment was applied to he mortars 24 h after casting. The results indicated that CO2 treatment resulted a carbonated a...