Zastosowanie ilościowej analizy obrazu do oceny struktury porów w betonie napowietrzanym

The paper is dedicated to an application of image analysis in evaluation of air-voids structure in air-entrained concrete. Awell-known procedure according to ASTM C457 is compared with the recommendations in the new Polish Standard PN EN 480-11. In accordance with the recent document, the air-void system can be evaluated also by means of appropriate image analysis system. A general description and some details of such system completed recently are given. A technique of concrete samples preparation for automatic measurements and effects of specimen preparation technique on the accuracy of results are also discussed. Some results obtained with the use of image analysis system are presented. Results obtained on selected specimens were compared with those obtained in two qualified European laboratories. Introduction of the presented technology is needed from the point of view of expected development of concrete road systems in Poland.