Abstract
Abstract Steel fibers recovered from recycled tires were considered for use as reinforcement in concrete to improve the tensile properties of concrete as well as being an economically viable and environmentally friendly alternative. This paper investigates the effect of purified and non-purified recycled tire steel fiber in concrete with a constant fiber proportion of 30 kg m−3 to determine properties in fresh and hardened concrete. The results indicate that concrete with purified tire fibers have better tensile properties than those with non-purified tire fibers. Density, strength, and toughness significantly increase but workability tends to decrease when using recycled tire steel fiber as reinforcement in concrete.
Highlights
The disposal of waste tires is considered one of the major global problems of waste management as approximately 1.5 billion tons of tires wastes are generated each year worldwide [1]
In 2016 [3], more than 3 million tons of waste tires remained for further treatment, about 1.9 million tons were processed for material recovery with 100,000 tons used for civil engineering, public works and backfilling using the steel fibers and granulated rubber
The experimental investigation was achieved using beams and cubes made from conventional concrete and fiber-reinforced concrete with 2 different kinds of fiber: Industrial Steel Fiber (ISF) and Recycled Tire Steel Fiber (RTSF)
Summary
The disposal of waste tires is considered one of the major global problems of waste management as approximately 1.5 billion tons of tires wastes are generated each year worldwide [1]. Using the materials recovered from tires, for example utilizing steel fibers in producing fiber reinforced concrete has the potential to decrease the amount of waste ending up in the landfill and increase the properties of concrete. Several scientific studies indicated that using recycled steel fibers in concrete could improve the fragile matrix, toughness, and post-cracking in concrete for structural applications [11]. The dosage of fiber content was kept at a constant 30 kg mÀ3 to avoid the balling effect due to the irregular shape of recycled tire steel fibers It determines a way for the utilization of recycled steel fibers in concrete by comparing its performance with conventional concrete and industrial fiber reinforced concrete
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