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对钢纤维掺量(体积分数,下同)为0%,1%,2%和4%的4种活性粉末混凝土(RPC),在较长龄期(3a)时进行单轴压缩试验,得到其轴向、径向应力-应变全曲线及轴应力-体应变曲线,并对以上曲线进行分析.结果表明:钢纤维活性粉末混凝土(SFRPC)峰值强度随钢纤维掺量的增加几乎呈线性增加,当钢纤维掺量为4%时,其圆柱体试件(Ф50×100mm)峰值强度可达218MPa;轴向峰值应变及平均泊松比随钢纤维掺量的增加而增加;钢纤维掺量为0%的素RPC弹性模量最大,钢纤维掺量为1%,2%和4%的SFRPC弹性模量相当;素RPC表现为劈裂破坏,钢纤维掺量为1%的SFRPC表现为单剪切破坏,而钢纤维掺量为4%的SFRPC表现为X形剪切破坏.
Four types of reactive powder concrete (RPC) with 0%, 1%, 2% and 4% steel fiber content (volume fraction) were tested for uniaxial compression at longer ages (3a) The results show that the peak strength of steel fiber reinforced reactive powder concrete (SFRPC) increases almost linearly with the increase of steel fiber content, and its axial, radial stress-strain curves and axial stress-body strain curves, When the content of steel fiber is 4%, the peak strength of cylindrical specimen (Ф50 × 100mm) reaches 218MPa; the axial peak strain and average Poisson’s ratio increase with the increase of steel fiber content; 0% had the highest elastic modulus of SFRPC, SFRPC of 1%, 2% and 4% of steel fiber had the same elastic modulus. Fractured fracture was observed for the pure RPC, SFRPC with 1% Single shear failure, and the steel fiber content of 4% of the SFRPC showed X-shaped shear failure.