Steel rebars have a minimal impact on the thermal conductivity of concrete. Since steel is a good conductor of heat, the presence of steel rebars in concrete can slightly increase its thermal conductivity. However, the effect is generally insignificant due to the low volume fraction of steel rebars compared to the concrete matrix.
Steel rebars have a negligible effect on the thermal conductivity of concrete, as they conduct heat at a much higher rate than concrete.
Steel rebars have a significant impact on the thermal conductivity of concrete. Due to their high thermal conductivity, steel rebars act as conductive pathways, allowing heat to easily transfer through the concrete. This results in an increased overall thermal conductivity of the concrete structure.
