ABSTRACT



Modernization and advancement in the technology enhances not only the human luxuries and compfort but also damage the environment. The use of vehicles in Pakistan is increasing day by day because of which disposal of solid waste to the landfills of used tyres is a serious issue to be solved for Pakistan environmental protection Agency (EPA). Still this industry faces enormous challenging conditions because of no any support from the government or any government afency for the recycling and reuse of waste tyre by products. Manually a large quantity of high strength steel fibers are being extracted from waste tyres, The main usage of this steel derived fibers from the tyres is the manufacturing new steel or iron alloys.


This research study is focusing on the use of steel fibers extracted from waste tyres in concrete with different proportions to produce a concrete stronger than ordinary concrete, and cost effective. Various fiber reinforced concrete specimens were prepared and presented for testing the compressive and split tensile strength in the universal load testing machine. The addition of steel fibers was made to the concrete mix by dry weight of mix with 0% (conventional), 0.5%, 1%, 1.5%, 2% and 2.5%.
Result shows that the compressive strength of concrete with 2.5% fibers improved up to 74o/o, whereas the tensile strength with 2% fibers improved up to 60%.

However, keeping in view the workability of mix, the optimum proportion of waste tyres steel fibers is 1.5%. At the addition of 1.5% fibers improves compressive strength up to 60% while indirect tensile strength improves to 32% as compared to the conventional concrete.