A statistical treatment has been applied to a deterministic service life model of concrete structures in marine environments. The chloride ingress model based on Fick's second law of diffusion was assumed. The quality of concrete was quantified in terms of three factors, namely, an apparent diffusion coefficient at 1 year (Da ), surface chloride concentration (Cs) and a critical chloride level (Ccr). The standard deviation of service life can be estimated from standard deviations of the four factors, namely, Cs , Da, Ccr and cover depth. The effect of the severity of environment on service life was also demonstrated. With data from the literature and an approximation of the inverse error function, sensitivity analyses were carried out. Service life was found to be more sensitive to cover depth than the diffusion coefficient, and more sensitive to surface chloride concentration than the critical chloride level. Characteristic service life of a range of normal Portland cement (NPC) concrete grades was evaluated as a function of 28-day strength and cover depths for a nominated confidence level. Such characteristic service life can be readily used and appreciated by design engineers.


    Access

    Access via TIB

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Characteristic service life for concrete exposed to marine environments


    Contributors:

    Published in:

    Publication date :

    2004


    Size :

    8 Seiten, 32 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




    Interpretation of chloride profiles from concrete exposed to tropical marine environments

    Castro, P. / De Rincon, O.T. / Pazini, E.J. | Tema Archive | 2001




    Concrete Bridge Service Life Extension Using Sealers in Chloride-Laden Environments

    Żemajtis, Jerzy / Weyers, Richard E. | Transportation Research Record | 1996


    Concrete Bridge Service Life Extension Using Sealers in Chloride-Laden Environments

    Żemajtis, Jerzy / Weyers, Richard | Transportation Research Record | 1996