钢渣混凝土的压敏性研究

Research on Compression Sensitivity of Steel Slag Concrete

钢渣中FeO含量较高,使用钢渣配制混凝土时,随着钢渣掺量增加,钢渣混凝土电阻率明显下降,SS∶C=1～4时,钢渣混凝土具有良好的导电性和力学性能;轴向压力作用时,在弹性变形阶段,钢渣混凝土电阻率随压力增大迅速降低,压力增大到一定程度,电阻率下降速度逐渐缓慢,压力达到极限荷载时,电阻率迅速升高;随着钢渣掺量的增加,钢渣混凝土抗压强度逐渐降低,而压敏性更加明显;钢渣细度对钢渣混凝土的压敏性无显著影响。

When the ferrous oxide content the content of steel slag increasing, the electrical of steel slag is rather high, if steel slag is used to prepare SSC, with resistivity of SSC decreases obviously. SSC has excellent conductive and mechanical properties when the ratio of steel slag to cement between 1 and 4. Under axial compression, the electri- cal resistivity of SSC decreases with the increase of the compression in elastic strain phase; with the the continuous increase of the compression, the decrease of the electrical resistivity of SSC slows down; when the compression reaches limit load,the electrical resistivity of SSC increases sharply. With the increase of the steel slag doping amount,the compression sensitivity of SSC improves even more obviously. The fineness of steel slag doesn＇t have remarkable effect on the compression sensitivity of SSC.