Testing Concrete Resistance to Frost and Salts by Pull of Method

A number of concrete specimens were laboratory tested by applying a freezing/thawing cycle according to RILEM CDC 4. The strength of concrete was tested by the pull-off method before and after the freezing/thawing cycle. The same tests were performed in situ on motorway concrete aged 3 and 4 years. The change of pull-off strength has been shown to be a good criterion for evaluating the resistance of concrete to frost and deicing salt.