A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Natural carbonation of self-compacting concretes
AbstractThis experimental work involves a study of the carbonation depth in self-compacting concretes at different ages and also analyses their porous microstructure, since these aspects are directly related to each other. Eight different concretes were used, four self-compacting (SCC) and four normally-vibrated (NVC). The carbonation rate was found to be lower in SCC than NVC, due to the fact that limestone fines produce less porosity and a finer microstructure. The difference between both types of concrete tends to disappear as their fines content becomes similar. It was also observed that, under the test conditions (RH 60.8%), for pore sizes under 0.065μm CO2 diffusion in the interior of the concrete is not significant. An expression is proposed to estimate carbonation rate in concrete from the volume of pores over 0.065μm and the threshold diameter.
Natural carbonation of self-compacting concretes
AbstractThis experimental work involves a study of the carbonation depth in self-compacting concretes at different ages and also analyses their porous microstructure, since these aspects are directly related to each other. Eight different concretes were used, four self-compacting (SCC) and four normally-vibrated (NVC). The carbonation rate was found to be lower in SCC than NVC, due to the fact that limestone fines produce less porosity and a finer microstructure. The difference between both types of concrete tends to disappear as their fines content becomes similar. It was also observed that, under the test conditions (RH 60.8%), for pore sizes under 0.065μm CO2 diffusion in the interior of the concrete is not significant. An expression is proposed to estimate carbonation rate in concrete from the volume of pores over 0.065μm and the threshold diameter.
Natural carbonation of self-compacting concretes
Valcuende, M. (author) / Parra, C. (author)
Construction and Building Materials ; 24 ; 848-853
2009-10-15
6 pages
Article (Journal)
Electronic Resource
English
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