Experimental Investigation of Concrete Carbonation under Different Conditions

This paper summarized the results of an experimental investigation on the carbonation of concrete under different conditions. Effects of two different conditions on carbonation of concrete were studied: (1) 5% CO2 concentration and 70% relative humidity, (2) 20% CO2 concentration and 70% relative humidity. The carbonation depth of specimens were obtained by experimental data and theoretical calculation. The analytical results showed that the carbonation of concrete under low CO2 concentration can reflect the rule of concrete carbonation very well. The investigations, in this paper, were not only important improvement for the method of artificial accelerated carbonation of concrete, but also the solid foundations for further study on the concrete carbonation.