Effect of hot and cold temperature on the mechanical behaviour of macro-synthetic fiber reinforced concretes

Fiber reinforced concretes (FRCs) are used in many civil engineering applications, i.e. industrial floors, tunnels, etc., given their ability of reducing concrete cracking. Besides their mechanical characteriza-tion, the effect of the environmental conditions, i.e. temperature, need to be properly understood. The present paper presents results of experimental tests on the effects of hot and cold temperatures, from -30 °C to + 60 °C, on the mechanical performances of FRCs containing polypropylene fibers. The results show that the temperature affects the compressive, tensile and residual flexural strength of the material.