Mechanical Properties of Carbon-Fiber–Reinforced Concrete

Abstract

Fibers are used to improve the properties of concrete. This paper investigates the mechanical properties of chopped carbon fiber-reinforced concrete (CFRC). The properties examined include workability, compressive strength, splitting tensile strength, and flexural strength. The fibers were added at the volume fractions of 0.5, 1.0, 1.5, and 2.0 percent. Adding carbon fiber to the concrete decreased the workability of concrete. Compressive strength of CFRC increases with increasing fiber content up to a certain percentage, after which increasing fiber content becomes unbeneficial. This optimum fiber content is found to be 1 percent, with strength effectiveness of 13 .65 percent. The splitting tensile strength of CFRC improved linearly with increased fiber content, and the strength effectiveness ranged from 18.37 percent to 132.6 percent. The flexural strength of CFRC improved linearly with increasing fiber content, and the strength effectiveness ranged from 3.26 percent to 13.82 percent. Relationships for compressive strength, splitting tensile strength, and flexural strength of CFRC are introduced. AbstractThis study is investigating the properties of self-consolidating concrete (SCC) containing synthetic polymer fibers. The influence of hybrid synthetic fiber reinforcement on concrete properties is reported. A total of six mixtures on which five of them are reinforced with fiber content ratio of 1 % using several percent of macro and micro fibers. The concrete mixtures' density, filling ability, passing ability, segregation and compressive strength are determined. The test results showed that all mixtures with fiber have lower density, slump and J-Ring flow than unreinforced concrete. The less the macro fiber percent in the mixture, the higher the slump flow.all mixtures are classified as resistant for static segregation resistance. SCC compressive strength decreased drastically with adding fibers linearly. homopolymer polypropylene fibers in a collated fibrillated form will give smaller flow slump, smaller compressive strength, but larger penetration depth than mixtures with homopolymer polypropylene monofilament fibers.

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