Einfluss des CO2-Gehaltes, der Nach- und Vorbehandlung sowie der Luftfeuchtigkeit auf die Karbonatisierungsgeschwindigkeit von Beton

Influence of CO₂-content, curing, preconditioning and relative humidity on the carbonation rate of concrete

In the middle of the last century the carbonation of concrete was an important issue. The damages then occurred, caused by the corrosion of the reinforcement, led to corresponding improvements of the standards. Due to changes in the cement and concrete market the durability of concrete is now again in the centre of attention. Thereby the performance of concrete has to be assured increasingly by testing. The present paper deals with the testing of the carbonation resistance of concrete. It is shown that the test with 4 % CO₂ is feasible and allows evaluating various factors. Furthermore, results on the influence of curing, preconditioning (pre-treatment) as well as of the relative humidity are presented.