In this paper the behaviour of the normal concrete and concrete with different types of fibre (steel, macro-polypropylene and micro-polypropylene fibres) have been studied; in terms of the compressive strength, split tensile strength, density, and the workability for concrete grade 30 without admixture. Varied fibre content to determine the optimum strength with 1%, 2%, and 4% by the volume of cement, cubes specimens of size 100mm×100mm×100mm to test the compressive strength were cured for the period of 7, 14 and 28 days before crushing, and cylinder specimens with 100mm diameter and 200mm length were cured for 28 days before breaking. The results show that there are some limitations of adding fibres to the mix; however the use of fibres has shown a significant change on the behaviour of the concrete without admixture. In total, 66 specimens including the normal concrete were cast and tested in comparison. The test also results show that the use of steel, macro-fibre, and micro-polypropylene change the failure types to ductile failures, thus overcoming the brittleness problem of the concrete, and improves the split tensile strength.
Bibliographical noteNOTICE: this is the author’s version of a work that was accepted for publication in Engineering Structures. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Engineering Structures, [113, (2016)] DOI: 10.1016/j.engstruct.2016.01.041
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- optimum strength
- Compressive strength
- split tensile strength
- Aspect Ratio