A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
The carbonation of autoclaved aerated concrete
During the long-term investigation of the physical properties of AAC (autoclaved aerated concrete) in the indoor environment with changing relative humidity and temperature the significant increase of the AAC density was found. It was proved that the increase of the density was a consequence of carbonation process. For the investigated types of the AAC the ultimate increase of density was proportional to initial dry density of the AAC. It was found as well that relative volumes of the micropores (with radius from 3.5 nm to 7500 nm) of the investigated types of the AAC are proportional to their dry densities. The simulation of the time courses of density increase due to carbonation based on solution of modified diffusion equation was done. In spite of using simplifications (constant value Of CO2 diffusion coefficient, neglecting the relative humidity changes), the calculated time courses coincided sufficiently with the measured ones.
The carbonation of autoclaved aerated concrete
During the long-term investigation of the physical properties of AAC (autoclaved aerated concrete) in the indoor environment with changing relative humidity and temperature the significant increase of the AAC density was found. It was proved that the increase of the density was a consequence of carbonation process. For the investigated types of the AAC the ultimate increase of density was proportional to initial dry density of the AAC. It was found as well that relative volumes of the micropores (with radius from 3.5 nm to 7500 nm) of the investigated types of the AAC are proportional to their dry densities. The simulation of the time courses of density increase due to carbonation based on solution of modified diffusion equation was done. In spite of using simplifications (constant value Of CO2 diffusion coefficient, neglecting the relative humidity changes), the calculated time courses coincided sufficiently with the measured ones.
The carbonation of autoclaved aerated concrete
Carbonatisierung von autoklaviertem Gasbeton
Hanecka, K. (author) / Koronthalyova, K.H. (author) / Matiasovsky, P. (author)
Cement and Concrete Research ; 27 ; 589-599
1997
11 Seiten, 4 Bilder, 1 Tabelle, 10 Quellen
Article (Journal)
English
Kohlendioxid , Beton , Leichtbeton , Autoklavierung , Dichte , Dauer , Feuchtigkeit , Pore , Carbonat , Diffusion , Flugasche , Porengrößenverteilung , Porengröße
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