ABSTRACT
In order to provide basis for service life of steel fiber reinforced concrete engineered for pavements in frigid region. Long-term freeze-thaw cycles were carried out on mill-cut steel fiber reinforced concrete (MFSRC) in 3.5% NaCl solution, taking into account the fiber volume fraction and cycle index under the coupled deterioration mechanisms of freeze-thaw and chloride penetration. The effect of fiber volumes (0.6%, 1% and 1.4% volume content of concrete) was quantitatively analyzed. The performance degradation of MFSRC was evaluated by surface scaling, mass loss, internal damage, relative dynamic elastic modulus and residual compressive and splitting tensile behaviors. The results show that MSFRC are able to withstand 100 freeze-thaw cycles without significantly surface scaling or degradation in mechanical properties. The internal damage degree of MSFRC sample in 200 saline freeze-thaw cycles is within the acceptable range. When the steel fiber content is increased to 1%, the deterioration of concrete is considerably reduced in the same cycle.
