Numerical analysis of the effect of coarse aggregate distribution on concrete carbonation

Corrugated stainless steels embedded in carbonated mortars with and without chlorides: 9-Year corrosion results

“…The effect of carbonation and chlorides in the corrosion behav ior of carbon steel in reinforcements has been studied in solution [15], showing a great dependence not only on the chloride content, but also on the concentration of the CO 3 2 /HCO 3 buffer. Although a common way to express critical chloride threshold to initiate cor rosion in reinforced structures is the [Cl ]/[OH ] ratio [16], some authors [17,18]have proved that the inhibiting effect of hydroxide ions becomes weaker with decreasing pH.…”

“…The carbonation rate depends on the diffusion of the gases in the concrete porous network. The penetration rate of the carbonation front is affected by the environmental conditions such as the C0 2 concentration [1] and the humidity (1,2], but also on concrete characteristics, such as the size of the aggregates (3], the water/cement ratio (4] or the composition of the cement (5 7].…”

CaPrM: Carbonation prediction model for reinforced concrete using machine learning methods

“…(1). This chemical reaction may gradually reduce the alkalinity of the pore fluid from pH value around 13-9 [7][8][9][10][11] CaðOHÞ 2 þ CO 2 À!…”

The effect of random porosity field on supercritical carbonation of cement-based materials

“…Using a random aggregate model, Han, et al [25] studied the effect of aggregates on carbonation penetration. Huang, et al [26] and Ruan, et al [27] studied the carbonation process of concrete and obtained a non-uniform distribution of carbonation depth.…”