期刊
FRONTIERS IN MATERIALS
卷 9, 期 -, 页码 -出版社
FRONTIERS MEDIA SA
DOI: 10.3389/fmats.2022.1057128
关键词
waste tire; recycled steel fiber; fiber-reinforced concrete; compressive; splitting tensile; flexural; mechanical behavior
资金
- Ministry of Science and Higher Education of the Russian Federation
- [075-15-2021-1333]
With the increasing number of waste tires, their disposal has become a serious environmental problem. This study explores the use of recycled steel fibers from waste tires to produce fiber-reinforced concrete. It is found that the mechanical properties of the concrete improve with an increase in the volume fraction of steel fibers. However, workability decreases significantly when the steel fiber content exceeds 2%.
With the increasing number of vehicles in the world, the amount of waste tires is increasing day by day. In this case, the disposal of expired tires will cause serious environmental problems. In recent years, instead of disposing of tire wastes, most of them have been started to be recycled to produce fiber-reinforced concrete. Thus, steel fibers recovered from waste tires have been preferred as an alternative to industrial steel fibers due to their environmentally friendly and low-cost advantages. In this study, an experimental study was carried out to explore the effect of fiber content on the fresh and hardened state of the concrete. To achieve this goal, compression, splitting tensile, and flexure tests were carried out to observe the performance of the concrete with tire-recycled steel fibers with the ratios of 1%, 2% and 3%. There is an improvement in the mechanical properties of the concrete with the increase of the volume fraction of the steel fiber. However, a significant reduction in workability was observed after the addition of 2% steel fibers. Therefore, it is recommended to utilize 2% tire-recycled steel fibers in practical applications. Furthermore, experimental results of concrete with tire-recycled steel fibers were collected from the literature and empirical equations based on these results were developed in order to predict the compressive and splitting tensile strengths.
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