The Influence of Short Time Water Cooling on the Mechanical Properties of Concrete Heated Up To High Temperature

This paper deals with the description of tests on concrete subjected to a high temperature and then cooled in two ways. Two series of cylinder specimens (103 mm in diameter, 200 mm in height) made of concrete C25/30 and C40/50 were tested. Specimens were heated in the electric furnace to 270, 370 and 500 °C. After heating, some of specimens were left in the open air and some of them were put in water for 10 sec and then left in the open air. Next day the compressive strength of concrete was tested. Test results are presented. In addition, the paper includes some test results taken from the literature.