Abstract—Fibres have been used recently in ground floor slabs to limit the cracks and increase its resistance to loads but due to limited experience in their use, design code coverage and availability it is still not widespread. In this paper, an investigation of the mechanical properties of rice, polypropylene and steel fibre-reinforced concrete is presented and discussed. Tests were undertaken on mixes containing 0.25% by volume of each fibre type and their effect on ground floor slab behaviour was studied. A displacement controlled point load was applied to the slabs at the centre. At the same time, cubes and beams were cast to determine the compressive strength and flexural properties of the concrete. Data generated from the tests were examined and the test results indicated that inclusion of fibres had increased the compressive strength by about 16% for polypropylene and flexural strength by about 18% for steel fibres compared with plain concrete. Rice straw fibres showed a decrease in the flexural and compressive strength but showed higher load carrying capacity for slabs. Experimental observations regarding the development of cracks and the failure pattern are presented.
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