Thermal analysis of rubber concrete under the effect of two heat treatments: shock temperature and standard fire

In order to know the advantages of using environmentally friendly materials in construction, namely, aggregates from tire recycling, this study aims to develop a numerical and mathematical model in order to analyze the thermal behavior of concrete on the basis of rubber aggregates as a function of time. The main goal of this paper is to look at how the heat shock temperature of 800 °C and the conditions of exposure to the ISO 834 standard fire affect the thermal behavior of concrete with different amounts of rubber (0%, 10%, 20%, and 30%) and constant humidity (3%). The results obtained show that for all mixtures, the temperature propagated in the sample decreases at different rates depending on the content of rubber aggregates. This reduction is mainly due to the decrease in the ability of the material to transfer heat and the increase in the thermal capacity that must be given to the material to increase its temperature. Statistics, frequency distributions, contours, and 3D views have all shown that the numerical model developed works. This makes the model an important tool and a good way to describe how concretes behave when heated.