Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Carbonation of concrete: the role of $ CO_{2} $ concentration, relative humidity and $ CO_{2} $ buffer capacity
Abstract In this study, the effect of $ CO_{2} $ concentration and ambient relative humidity (RH) on accelerated and natural carbonation of 18 concrete mixtures produced with nine different cement types is investigated. Increasing the $ CO_{2} $ concentration from 0.045 to 1 and 4 % at 57 % RH does not alter the relative carbonation resistance between the concrete mixtures. The increase of RH from 57 to 70 and 80 % RH at 4 % $ CO_{2} $ shows a water-to-cement ratio and cement-specific effect that affects the relative carbonation resistance between the concrete mixtures. The carbonation resistance at 4 % $ CO_{2} $ and 57 % RH allows assessing the carbonation resistance of concrete in sheltered and with restrictions in unsheltered outdoor exposure. The carbonation resistance below 70 % RH is mainly governed by the $ CO_{2} $ buffer capacity. However, in the accelerated tests at 80 % RH and in the unsheltered outdoor exposure capillary condensation is of increased importance.
Carbonation of concrete: the role of $ CO_{2} $ concentration, relative humidity and $ CO_{2} $ buffer capacity
Abstract In this study, the effect of $ CO_{2} $ concentration and ambient relative humidity (RH) on accelerated and natural carbonation of 18 concrete mixtures produced with nine different cement types is investigated. Increasing the $ CO_{2} $ concentration from 0.045 to 1 and 4 % at 57 % RH does not alter the relative carbonation resistance between the concrete mixtures. The increase of RH from 57 to 70 and 80 % RH at 4 % $ CO_{2} $ shows a water-to-cement ratio and cement-specific effect that affects the relative carbonation resistance between the concrete mixtures. The carbonation resistance at 4 % $ CO_{2} $ and 57 % RH allows assessing the carbonation resistance of concrete in sheltered and with restrictions in unsheltered outdoor exposure. The carbonation resistance below 70 % RH is mainly governed by the $ CO_{2} $ buffer capacity. However, in the accelerated tests at 80 % RH and in the unsheltered outdoor exposure capillary condensation is of increased importance.
Carbonation of concrete: the role of $ CO_{2} $ concentration, relative humidity and $ CO_{2} $ buffer capacity
Leemann, Andreas (Autor:in) / Moro, Fabrizio (Autor:in)
2016
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Carbonation of concrete: the role of CO2 concentration, relative humidity and CO2 buffer capacity
| British Library Online Contents | 2017
Carbonation of concrete: the role of CO2 concentration, relative humidity and CO2 buffer capacity
| Online Contents | 2017
Carbonation of concrete: the role of CO2 concentration, relative humidity and CO2 buffer capacity
| Springer Verlag | 2016
Influence of environmental relative humidity on carbonation of concrete (mathematical modeling)
| British Library Conference Proceedings | 1993
Influence of Cyclic Humidity on Carbonation of Concrete
| British Library Online Contents | 2013