EFFECT OF CARBON FIBERS AMOUNT ON CONCRETE THERMAL CONDUCTIVITY AND COMPRESSIVE STRENGTH

	EFFECT OF CARBON FIBERS AMOUNT ON CONCRETE THERMAL CONDUCTIVITY AND COMPRESSIVE STRENGTH
AL-TAQANI
Article 1, Volume 24, Issue 6, 2011, Pages 0-0
Abstract
The present study includes an experimental work to find out the benefit arises from CFRP (Carbon Fiber Reinforced Polymer) laminates addition to concrete mix in reducing the whole thermal conductivity and the heat transfer through construction elements, which increase thermal insulation and reduce consumption of electricity used for air conditioning equipments. Eight concrete specimens of rectangular cross sections were cast to examine the thermal conductivity, in addition to that a (12) standard concrete cubes were prepared to find out the compressive strength of concrete. Carbon fibers were cut and added with different amounts to get its effect on heat transfer and thermal conductivity for concrete to compare it with the compressive strength. Test results for thermal conductivity for testing time of (390) minutes for each specimen showed an increase in thermal insulation for the strengthened concrete, and this insulation increases with increasing amount of CFRP added. The concrete samples and cubes were divided into four groups of different amount of CFRP, which were (0 %, 0.45 %, 1.1 %, 1.6 %) of cement weight used in the mix. In spite of that, the insulation was increased in the existence of CFRP, the compressive strength was reduced by (6.4-28.5) %, when increasing CFRP amount, with respect to control concrete

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