Carbonic Gas Randomness Effect on Reinforced Concrete Carbonation

Abstract

This paper deals the randomness effect of the pressure of carbonic gas on the carbonation phenomenon of the reinforced concrete. This analysis concentrates on the evaluation of carbonation depth (Xc) and the carbonation time (T1) which is the time necessary so that the face of carbonation arrives until the reinforcement from a probabilistic analysis. Monte Carlo simulations are realized under the assumption that the carbonic gas on the surface of the concrete is random variable with a log-normal probability distribution

Probabilistic Carbonation Simulations in Concrete Based on Marble Powder

“…Log-normal distributions are generated, and the deterministic numerical procedure is applied to each individual simulation, providing 10,000 values of the depth carbonation parameters. Finally, statistics of the depth factors (mean, standard deviation and confidence interval) are calculated [6,7]. The behavior of the coefficient of variation of carbonation depth versus the number of realizations is also investigated.…”

Uncertainty Impact of the Effective Diffusion Coefficient on the Concrete Chemical Degradation

“…The characteristics of studied concrete and cement chemical composition are shown in (Badaoui et al, 2012). It is considered that this concrete is located inside of a building where the humidity of the ambient air is medium or high.…”

“…Indeed, the diffusion of carbon dioxide through the porous structure of concrete is determined by the Water to cement ratio and porosity. Badaoui et al (2012;Castellote et al, 2001) and are identified in italic type, within parentheses.…”

Incidence of the Randomness of the Most Influential Parameters on the Reinforced Concrete Carbonation Time

“…The parameters of the lognormal distribution of W/C, RH and Cs are expressed as. [7,8] Finally, statistics of the time factors (mean, standard deviation and confidence interval) are calculated.…”