纳米碳纤维在预应力混凝土结构中的增强作用研究  

Research on Strengthening Effect of Carbon Nanofibers in Prestressed Concrete Structures

作　　者：朱兴礼 ZHU Xing-li(No.1 Engineering Development Co.,Ltd.,China Railway 14th Bureau Group,Rizhao 276800,China)

机构地区：[1]中铁十四局集团第一工程发展有限公司,山东日照276800

出　　处：《塑料科技》2023年第12期53-56,共4页Plastics Science and Technology

摘　　要：纳米碳纤维作为复合材料增强体,可改善混凝土的强度、弹性和耐久性等方面。文章在预应力混凝土材料中掺入不同质量分数的纳米碳纤维,制备了纳米碳纤维掺量改性预应力混凝土材料,探究纳米碳纤维在预应力混凝土结构中的增强作用。结果表明:随着纳米碳纤维掺量的增加,试样的抗压强度、抗折强度和劈裂抗拉强度呈现先上升后降低的趋势;预应力混凝土的磨损量呈现先下降后上升的趋势。当纳米碳纤维掺量为0.3%时,预应力混凝土的孔隙率和磨损量均为最低,分别为26.23%和1.2 kg/m^(2)。因此,适量添加纳米碳纤维(质量分数为0.3%)可有效提高预应力混凝土的力学性能和磨损性能。As a composite reinforcement,carbon nanofibers can improve the strength,elasticity and durability of concrete.Prestressed concrete materials with different mass fractions of carbon nanofibers were added to prepare carbon nanofibers modified prestressed concrete materials,and the enhancement effect of carbon nanofibers in prestressed concrete structures was explored.The results show that with the increase of the content of carbon nanofibers,the compressive strength,flexural strength,and splitting tensile strength of the samples increase first and then decrease.The wear loss of prestressed concrete shows a trend of decreasing first and then increasing.When the content of carbon nanofibers is 0.3%,the porosity and wear of prestressed concrete are the lowest,which are 26.23%and 1.2 kg/m^(2)respectively.Therefore,the proper addition of carbon nanofibers(mass fraction of 0.3%)can effectively improve the mechanical properties and wear properties of prestressed concrete.

关 键 词：纳米碳纤维 预应力混凝土 增强作用 

分 类 号：TU528.57[建筑科学—建筑技术科学]