Abstract
The use of fibers in concrete at relatively low volume fraction has been gaining rising popularity among researchers for the recent years due to its availability, ability to enhance overall performance and cost effectiveness. Fibers are mainly classified according to their origin. Numerous researches have been carried out with natural and artificial fibers separately to elucidate its effect on the various parameters of concrete. However, a little finding is available about the comparative study among these three distinct types of fibers affecting concrete properties. In this study coconut coir, nylon thread and low-cost galvanized iron wire have been selected as natural, synthetic and steel fibers respectively. Coconut coir and nylon thread were mixed at three different percentage of 1.5%, 2.5% and 3.5% respectively by weight of cement. Steel fibre contents 1.5%, 2.5% and 3.5% respectively by weight of concrete. The results were obtained through an experimental investigation that shows the influence of natural, synthetic and steel fibers on rheological and mechanical properties of concrete. Optimum fibre content was 2.5% where steel fibre shows a maximum 17% and 30% rise in compressive and flexure strength respectively. On the other hand, fibres play a great role with its combining effect on the post cracking ductility and energy absorption of concrete.
Highlights
In the present world the infrastructure development largely depend on the use and enhancing of the properties of concrete
A research work to evaluate the effectiveness of banana fibre to promote the impact strength lightweight self-compacting concrete executed that 1.25% addition of banana fibres could improve the impact strength of lightweight self-compacting concrete with no undesirable effect on the self-compatibility [12]
A case study to enhance the quality of concrete, utilizing locally available low-cost Galvanized Iron (GI) wire fibres in concrete suggested that 2.5-3.5% of Galvanized Iron (GI) wire fibres by weight could produce relatively better results for a particular mix design [13]
Summary
In the present world the infrastructure development largely depend on the use and enhancing of the properties of concrete One such improvement is the incorporation of fibres to overcome the weakness of concrete such as brittleness, weak in tension, cracking etc. A case study to enhance the quality of concrete, utilizing locally available low-cost Galvanized Iron (GI) wire fibres in concrete suggested that 2.5-3.5% of Galvanized Iron (GI) wire fibres by weight could produce relatively better results for a particular mix design [13]. Research suggests that 0.2–0.25% of basalt fibre dosage improve the structural strength [15]. The addition of lathe factories waste fibres to recycled concrete geopolymer beams confirmed better results to improve the displacement ductility, energy absorption, loading carrying capacity and toughness [16]. On the basis of the flexural, compressive strength, cracking pattern and mechanical interaction of the fibers with concrete materials, the performances of the concrete composited with three different fibers were justified
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