A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Simulation of chloride penetration in cement-based materials
Corrosion of reinforcement in concrete can initiate when chloride ion concentration in contact with steel bars exceeds a threshold value. It is then of crucial importance to describe Cl(-) penetration through models based on fundamental physico-chemical relationships avoiding the use of empirical parameters. Here, the multicomponent diffusional process was simulated by means of the percolation concepts. Furthermore, the adsorption of chloride within hardened cement paste was also considered. General relationships were derived to calculate binding coefficients and effective diffusivity of ions as a function of technological concrete parameters. The model explains experimental trends in a wide range of operating conditions (e.g., with and without superimposed current) both for cement paste and concrete.
Simulation of chloride penetration in cement-based materials
Corrosion of reinforcement in concrete can initiate when chloride ion concentration in contact with steel bars exceeds a threshold value. It is then of crucial importance to describe Cl(-) penetration through models based on fundamental physico-chemical relationships avoiding the use of empirical parameters. Here, the multicomponent diffusional process was simulated by means of the percolation concepts. Furthermore, the adsorption of chloride within hardened cement paste was also considered. General relationships were derived to calculate binding coefficients and effective diffusivity of ions as a function of technological concrete parameters. The model explains experimental trends in a wide range of operating conditions (e.g., with and without superimposed current) both for cement paste and concrete.
Simulation of chloride penetration in cement-based materials
Simulierung der Chloridpenetration in Werkstoffen auf Zementbasis
Masi, M. (author) / Colella, D. (author) / Radaelli, G. (author) / Bertolini, L. (author)
1997
11 Seiten, 8 Bilder, 1 Tabelle, 31 Quellen
Conference paper
English
armierter Beton , Korrosion , Chlorid , Beton , Diffusion , Adsorption , Porosität , Portlandzement , Simulation , mathematisches Modell , Zementpaste
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