橡胶粉改性桥梁复合材料(SFRC)的力学性能测试研究  

Experimental study on mechanical properties of steel fiber reinforced concrete for bridge engineering

作　　者：杨冰 YANG Bing(Yunnan Jiaotou Group Yunling Construction Co.,Ltd.,Kunming 650000,China)

机构地区：[1]云南交投集团云岭建设有限公司,云南昆明650000

出　　处：《粘接》2023年第10期165-168,共4页Adhesion

摘　　要：针对桥梁工程用混凝土材料在特殊使用环境下的复杂受力性,试验通过不同掺量的橡胶粉,对6%钢纤维掺量的钢纤维混凝土(SFRC)进行改性,制备一种高综合性能的SFRC,并对其性能研究。试验结果表明,适当的橡胶粉掺入,可以增加SFRC的抗折强度、冲击韧性以及断裂韧度,减小SFRC的抗压强度,对材料弹性模量无较大影响。试验确定最佳橡胶粉掺量为6%,此时,养护28 d的SFRC的抗折强度、冲击韧性以及断裂韧度最高,分别为9.64 MPa、12 451.22 J、432.18 kN/m,抗压强度达到33.64 MPa,弹性模量为27.13 GPa,该橡胶改性钢纤维混凝土具备良好的强度、韧性。In response to the complex mechanical properties of concrete materials used in bridge engineering under special usage environments,this experiment modified 6% steel fiber reinforced concrete(SFRC) with different amounts of rubber powder to prepare a high comprehensive performance SFRC,and studied its performance.The experimental results show that the appropriate addition of rubber powder can increase the flexural strength,impact toughness,and fracture toughness of SFRC,reduce the compressive strength of SFRC,and have no significant impact on the elastic modulus of the material.The optimal rubber powder content determined in this experiment is 6%.At this time,the flexural strength,impact toughness,and fracture toughness of SFRC cured for 28 days are the highest,with 9.64 MPa,12 451.22 J,and 432.18 kN/m,respectively.The compressive strength reaches 33.64 MPa,and the elastic modulus is 27.13 GPa.This rubber modified steel fiber concrete has good strength and toughness.

关 键 词：橡胶粉 钢纤维混凝土 抗折强度 抗压强度 韧性试验 

分 类 号：TQ178[化学工程—硅酸盐工业]