DETERMINATION OF THE FIRE SOURCE BASED ON THE VALUE OF THE SURFACE HARDNESS OF CELLULAR CONCRETE BLOCKS
The article presents the results of measuring of the residual surface hardness of samples from cellular concrete blocks after thermal exposure to them for 15, 20, 30 minutes and cooling with water followed by drying. The dependence of the change in the residual surface hardness of cellular concrete samples after thermal exposure to them and cooling with water followed by drying has been established. The results of the conducted studies show that the surface hardness of cellular concrete correlates with the magnitude of the acting high temperatures. It has been established that the measurement of the residual surface hardness is most appropriate to be carried out one day after the termination of fire extinguishing work. This method of investigating cellular concrete building structures at the site of a fire can be successfully applied to detect a fire source in conjunction with the results obtained by other methods.