Experimental study on mechanical properties of recycled carbon fiber reinforced concrete
LIU Bin
YU Long
SUN Liucun
Abstract：In this paper,four types of recycled carbon fibers were used to prepare reinforced concrete.The effects of fiber strength,tensile strength,diameter and dosage on the mechanical properties of concrete were studied,which included compressive strength,flexural strength,flexural toughness,impact resistance,and crack reduction coefficient.The results show that the recycled car-bon fibers can improve the compressive and flexural strength of concrete,and effectively enhance the flexural toughness and impact resistance of concrete.To ensure the fluidity of concrete,it is recommended that the content of recycled carbon fiber does not exceed 1.0%.The flexural toughness of carbon fiber reinforced concrete is more than 20%higher than that of the benchmark concrete.The crack control effect of fine carbon fibers is slightly better than that of coarse fibers.SEM analysis results show that there exists a close interfacial bond between the recycled carbon fiber and concrete matrix,which can effectively play the role of bridging and im-prove the properties of concrete.
Keywords：recycled carbon fiberfiber parametersfiber reinforced concretemechanical propertiescracking resistance
Publication Date：2025-12-25
Online Publishing Date：2026-01-13(First online date of this platform, not the publication date of the document)
Pages：6( 84-89 )