Experimental Investigation on the Dynamic Mechanical Properties and Microstructure Deterioration of Steel Fiber Reinforced Concrete Subjected to Freeze–Thaw Cycles

In this study, the dynamic mechanical properties of steel fiber reinforced concrete under influence freeze–thaw cycles were studied. The studied parameters include content (0%, 1% and 2%), confining pressures (0, 5 10 MPa) strain rates (10−5/s, 10−4/s, 10−3/s 10−2/s). Performance was also evaluated, including triaxial compressive strength, peak strain, relationship between stress failure mode microstructure. results show that with increase in F–T cycles, strength energy absorption capacity gradually decrease. increased addition fibers during optimum amount to enhance resistance is within evaluation range. effects rate pressure on after are Both factor linearly rate, characterized by an intensity caused rate. When there no confining, crack direction specimen parallel loading direction, when it manifested as oblique shear failure. scanning electron microscopy analysis microstructure demonstrate performance at macroscopic level (compressive strain).