玄武岩纤维增强全再生粗骨料混凝土力学性能试验研究

Experimental Study on Mechanical Properties of Basalt Fiber Reinforced Fully Recycled Coarse Aggregate Concrete

研究了玄武岩纤维掺量对全再生粗骨料混凝土抗压和抗折强度、破坏形态、单轴受压应力-应变曲线的影响。结果表明:掺入玄武岩纤维后,试件的抗压强度提高,受压破坏时的整体性更好;随着玄武岩纤维掺量的增加,试件的抗折强度逐渐增大,所有抗折试件均为峰值后脆性破坏;随着玄武岩纤维掺量的增加,试件的峰值应力先增大后减小,峰值应变、静压弹性模量和轴压韧性比总体均呈增大趋势。

The effects of basalt fiber content on the compressive and flexural strength,failure mode and uniaxial stress-strain curve of fully recycled coarse aggregate concrete were studied.The results show that after adding basalt fiber,the compressive strength of the specimen is improved and the integrity of compression failure is better.With the increase of basalt fiber content,the flexural strength of the specimens increases gradually,and all flexural specimens are brittle failure after peak value.With the increase of basalt fiber content,the peak stress increases first and then decreases,and the peak strain,static elastic modulus and axial compressive toughness ratio increase as a whole.