EXPERIMENTAL STUDY ON COMPRESSIVE STRENGTH OF THE FIBER REINFORCED CONCRETE WITH SLAG POWDER AFTER THE ACTION OF HIGH TEMPERATURE

Through the compressive experiments on the cubic and prismatic specimens respectively,the influences of temperature,slag powder content,steel fiber volume ratio,polypropylene fiber content and concrete strength grade on compressive strength after high temperature were analyzed.The results show that the cubic and prismatic compressive strength of the fiber reinforced concrete with slag powder reduces along with the rising of temperature,and the cube compressive strength is close to the axial compressive strength gradually.Furthermore,the cubic and prismatic compressive strength of fiber reinforced concrete with slag powder increases with the increasing of slag powder content,steel fiber volume ratio and polypropylene fiber content after the action of high temperature;but the rates of increase are not different.