ABSTRACT
When testing the salt scaling resistance of concrete, different test methods can be used. The difference in preconditioning climate, test surfaces used, the time the test specimens are subjected to the climate etc., give rise to difficulties when comparing results from different methods. In order to accurately be able to interpret and translate the results from these methods, it is necessary to learn more about the causes of the differences in results. In this investigation the influence of the preconditioning climate on the scaling resistance for various types of test surfaces is examined. The freeze/thaw test used is the Swedish standard SS 13 72 44, more commonly known as the "slab test" or the "Boras method". Two concrete qualities, both with OPC as binder, were tested. Three types of test surfaces were investigated, surface cut 7 respectively 21 days after casting and cast surface. Two preconditioning climates were examined, 65% RH/20°C and 50% RH/20°C.
