Workability and mechanical properties of steel fiber reinforced rubberized concrete
In this paper,a total of 150 specimens were fabricated with rubber particles volume substation of sand(0％-20％)and steel fiber volume fraction(0vol％-1.5vol％).The cube and axial compression test,splitting tensile test,bending test,double-shear test were performed to investigate their mechanical properties of steel fiber rein-forced rubberized concrete(SF-R/C),and the microstructure and interface of SF-R/C were investigated by scanning electron microscopy(SEM).The results show that adding rubber particles and steel fiber can significantly reduce the workability.With the increase of rubber content,each test of SF-R/C strength decreases.Different from rubber concrete,the failure mode of SF-R/C specimens is ductile.After adding steel fiber,SF-R/C strengths increase in varying degree,especially in shear strength.The shear strength is enhanced by 78％with a steel fiber content of 1.5vol％and a rubber particles volume substation of 10％.Based on experimental data and comprehen-sively considering the influence of rubber particles and steel fibers,the calculation formula of strength indexes of SF-R/C were put forward and the interrelations among the strength indexes of SF-R/C are obtained.
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