ABSTRACT
In recent years a number of new important concrete structures in Norwegian marine environments have been built, and for most of them the specified durability has mainly been based on the minimum requirements according to the current concrete codes (Standard Norway, 2003a, 2003b, 2003c). In order to obtain some further information about the quality of the concrete typically applied to all these new concrete structures, samples of the concrete from some of these construction sites were collected in order to test the development of chloride diffusivity based on the RCM method (NORDTEST, 1999). Although all of these types of concrete fulfilled the specified durability requirements for a severe marine environment according to current concrete codes, it may be seen from Table 11.1 that
the chloride diffusivity or the resistance to chloride penetration of the various types of concrete varied within wide limits. All this testing was carried out on separately cast concrete specimens from the various construction sites and then water cured in the laboratory until the time of testing.
