Materiales de Construcción, Vol 64, No 313 (2014)

A statistical approach to the study of concrete carbonation


https://doi.org/10.3989/mc.2014.00413

I. Garcia-Lodeiro
Instituto de Ciencias de la Construcción Eduardo Torroja (IETcc-CSIC), Spain

J. G. Palomo
Universidad Politécnica de Madrid, Spain

A. Palomo
Instituto de Ciencias de la Construcción Eduardo Torroja (IETcc-CSIC), Spain

A. Fernández-Jiménez
Instituto de Ciencias de la Construcción Eduardo Torroja (IETcc-CSIC), Spain

Abstract


Carbonation is one of the factors that conditions reinforced concrete durability, while porosity is one of the parameters that determines the carbonation rate: as a rule, the greater the porosity, the higher the rate. While many papers have been published on the effect of CO2 penetration in the pore solutions of concretes prepared under different experimental conditions, the literature has yet to address the joint effect of the factors considered in concrete design, such as the water/cement (w/c) ratio, type of cement, type of aggregate and presence of admixtures. The present paper discusses the findings of a statistical study of the impact of the aforementioned factors on both system porosity and carbonation rate. The type of cement, individually and in its interaction with the rest of the factors, proved to be the major determinant in concrete carbonation.

Keywords


Carbonation; Porosity accessible to water; Concrete; Factorial design

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