Mechanical properties of high performance carbon fiber concrete

الملخص EN

In this research mechanical properties of high performance carbon fiber concrete are studied.

The experimental work includes, producing high performance concrete using super plasticizer and condensed silica fume reinforced with different volume fractions (0 %, 0.2 %, 0.3 %, 0.4 % and 0.5 %) of carbon fibers.

The effect of chopped carbon fibers on the mechanical properties (compressive strength, splitting tensile and flexural strengths, and modulus of elasticity) of high performance concrete was also studied.

Generally, the results show that the addition of carbon fibers improves the mechanical properties of high performance concrete.

Also the results show that Using condensed silica fume as addition by weight of cement increases the compressive strength more than that as replacement by weight of cement.

The percentages increase in compressive strength of concrete containing 15 % silica fume as replacement and as addition by weight of cement are about 14 % and 26 % respectively.

The addition of carbon fibers causes a slight increase in compressive strength and modulus of elasticity of high performance concrete, when the fiber volume fraction increases while the splitting tensile and flexural strengths shows a significant increase relative to the reference high performance concrete (without fiber).

The percentage increase in splitting tensile and flexural strengths for high performance concrete with fiber volume fraction 0.5 % at 28 days is about 45 % and 46 % respectively.