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使用DYS-2500高温高压岩石三轴试验机对钢纤维再生混凝土圆柱体进行了单轴压缩和常规三轴压缩试验研究。结果表明,钢纤维再生混凝土在单轴压缩和三轴压缩下的破坏形态有所差别;同一围压下,钢纤维再生混凝土随着钢纤维掺量的增加,试件能承受的主压应力及轴向应变也相应增加,且围压下的应力-应变曲线走势大体一致;相同掺量钢纤维再生混凝土,随着围压值的提高,其承受的主压应力、轴向应变也相应提高;围压15MPa时,钢纤维再生混凝土的峰值应力约是单轴压缩下峰值应力的3.08~4.13倍;同一围压下的纤维再生混凝土,钢纤维掺量2%的峰值应力约是普通再生混凝土峰值应力的1.15~1.54倍;围压15MPa时钢纤维再生混凝土的峰值应变比0MPa时的峰值应变增加了5.98~6.76倍;同一围压下的再生混凝土,钢纤维掺量2%的峰值应变约是普通再生混凝土峰值应变的1.22~1.52倍。
The DYS-2500 high temperature and high pressure rock triaxial testing machine was used to study the uniaxial compression and conventional triaxial compression tests of steel fiber recycled concrete cylinders. The results show that the failure modes of steel fiber reinforced recycled concrete are different under uniaxial compression and triaxial compression. Under the same confining pressure, with the increase of steel fiber content, the main compressive stress that steel specimens can withstand and The axial strain increases correspondingly and the trend of stress-strain curve under confining pressure is generally the same. With the increase of confining pressure, the same compressive stress and axial strain of steel reinforced recycled concrete increases accordingly. The confining pressure of 15MPa, the steel fiber reinforced concrete peak stress is about uniaxial compressive peak stress of 3.08 to 4.13 times; the same confining pressure of fiber reinforced concrete, steel fiber content of 2% of the peak stress is about ordinary recycled concrete peak 1.15 ~ 1.54 times the stress; when the confining pressure is 15MPa, the peak strain of recycled steel fiber reinforced concrete is 5.98 ~ 6.76 times higher than the peak strain at 0MPa; the peak strain of recycled fiber reinforced concrete and steel fiber with 2% Ordinary recycled concrete peak strain of 1.22 ~ 1.52 times.