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Effect of CaCl2 and NaCl additions on concrete corrosivity by F Pruckner; O.E Gjørv is a Engineering article available to read on EtoBox.

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In addition to breaking down the passive film on embedded steel, the level of chloride content in concrete also influences the electrical resistivity of the concrete and, hence, the kinetics of the reinforcement corrosion, as long as the corrosion process is under resistance control. While there is general agreement in the literature that the binding of chlorides in concrete is higher when CaCl 2 is added to the fresh concrete, in comparison with NaCl, the effect of different chloride sources on the concrete resistivity is not so well known. To quantify the effect of different types of chloride source on the concrete corrosivity, different mortars with OPC and 0.50 w/c were prepared, and various amounts of CaCl 2 , NaCl and NaOH were added to the fresh mixtures. The corrosivity was primarily tested by measurements of electrical resistivity and acid capacity. The paper summarizes the results of the study regarding the effect of both the type and amount of chloride source on concrete corrosivity.

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Author

F Pruckner; O.E Gjørv

Publisher

Elsevier Science; Elsevier ; Elsevier Ltd.; Elsevier BV (ISSN 0008-8846)

Published

2004

Language

EN

Field

Engineering (Physical Sciences)