Review article

The article presents the study results of the thermal conductivity of steel fiber reinforced concrete (SFRC) on a matrix of fine-grained concrete with different types of steel fibers and different content of fibers. It is shown, that with an increase in the volume content of steel fiber, the thermal conductivity coefficient of SFRC, depending on the diameter of the fiber, can either increase or decrease compared to the thermal conductivity coefficient of the matrix. The obtained result is explained based on the influence of both the ratio between the wavelength of infrared (thermal) radiation and the diameter of the steel fiber and the conditions of thermal flow passage through the fiber-matrix boundary on the thermal flow propagation.