The test was conducted using cylindrical concrete that had been cured for 28 days and then burned to simulate the event that concrete would be heated by a fire. It takes 2 hours to burn at a temperature of 600 degrees Celsius.
Testing was conducted using cylindrical concrete that has been cured for 28 days. And burn it to simulate the event of concrete being heated by a fire, which takes 2 hours to burn at 600 degrees Celsius.