Experimental analysis of high performance fibre reinforced concrete plates

Abstract

The article presents the experimental results of bent plates made of high performance concrete and high performance fibre concrete. The test was performed for plate elements with reinforcement mesh of 8 mm rods. The main aim of the test was to define the influence of adding polypropylene and steel fibres on carrying capacity and deformability of fibre reinforced concrete plates. All plates had identical reinforcements and differed by the percentage of fibres. The research was performed into Zwick/Roell hydraulic press, with the load range from 0 to 3000 kN. During the tests, the rate of displacement increment was controlled. The load and deflection were registered. The analysis of the results was made on the basis of crack development, damage images and load – deflection relations. Experimental tests proved the usefulness of steel and polypropylene fibres in order to improve the ultimate tensile strength of high performance concrete in plates. Adding fibres changes the characteristics of high strength concrete – from a brittle, into elasticplastic material. The analysis of the results proves that cooperation between the concrete matrix and fibres is very effective. With the increase of the number of fibres increased concrete tensile strength and maximum deflection of plates.