It mainly studies the effect of recycled glass fiber on improving the mechanical properties and frost resistance of concrete.The results show that the addition of fiber can significantly improve the mechanical properties of concrete.When the fiber content ranges from 4 kg/m3 to 12 kg/m3,the compressive strength increases the fastest,with an increase rate of 15.9％and 24.8％,respectively.After 200 freeze-thaw cycles,the dynamic elastic modulus of common C30 specimen decreased to 34.9％,which reached the freeze-thaw failure standard.After 300 freeze-thaw cycles,the dynamic elastic modulus of the specimens with fiber were 62.0％,70.9％,96.3％,96.5％and 96.8％,respectively,and the freeze resistance grade reached F300.By scanning electron microscope analysis,the mechanism of fiber reinforcement effect was discussed.It was found that recycled glass fiber enhanced the surface structure and interface bonding state of aggregate,and improved the pore structure characteristics of concrete.Compared with C30 ordinary concrete,the mechanical properties and freeze-thaw resistance of recycled glass fiber concrete were significantly enhanced.
关键词
再生玻璃纤维/抗压强度/微观形貌/混凝土抗冻性能
Key words
recycled glass fiber/compressive strength/microstructure/freezing resistance of concrete
维普
万方数据