Simulation of chloride penetration in cement-based materials
- Politecnico di Milano (Italy). Dipt. di Chimica Fisica Applicata
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{sup {minus}} 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.
- OSTI ID:
- 561942
- Journal Information:
- Cement and Concrete Research, Vol. 27, Issue 10; Other Information: PBD: Oct 1997
- Country of Publication:
- United States
- Language:
- English
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