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Steel fibre reinforced concrete - Dissertation Example

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Steel fibre reinforced concrete

Two-point load test was used to examine the bending moment of the bars while the cubes were subjected to compression tests for estimating their compressive strength. The flexural strength was also quantified. The effects observed on the steel fiber and steel bar reinforced beams and cubes were compared with those of beams and cubes made with plain concrete. The observations and comparisons are discussed. Introduction High durability and strength are an important prerequisite for concrete structures as they are continuously exposed to various forces, both static and dynamic (Elavenil & Knight 2007). Therefore, considerable research in recent years has focused on enhancing these properties in concrete. The use of fibers for reinforcement in concrete has been shown to improve its behavior. Reinforcement with fibers improves the toughness of concrete under any kind of loading as the fibers increase the strain experienced at peak load and enhance energy absorption (Van Chanh 2005). While several fibers such as glass, steel, cellulous and synthetic fibers are used for concrete reinforcement, the effects of reinforcement using steel fibers is explicitly discussed here. Special emphasis is given to the mechanical properties and performance of SFRC as compared to plain concrete. ...
Hence, a large amount of energy has to be absorbed before there is complete separation of the concrete post-cracking. The material properties of any fiber reinforced concrete will vary with the dosage of the fiber, the geometry of the fiber and the different combinations of fibers used (Ross n.d.). Aims and Objectives The aim of this investigation is to examine the effects of steel fiber reinforcement on the mechanical properties of concrete. For this purpose, both steel fiber reinforced concrete (SFRC) and plain concrete have been compared. The beams and cubes examined in this experiment are made of: 1. Steel fiber HE (Hooked End) reinforced concrete at a ratio of 20 kg/m3 2. Steel fiber HE reinforced concrete at a ratio of 40 kg/m3 3. Steel fiber XR reinforced concrete at a ratio of 20 kg/m3 4. Steel fiber XR reinforced concrete at a ratio of 40 kg/m3 5. Plain concrete 6. Normally reinforced concrete with two 6mm diameter bars 7. Normally reinforced concrete with four 6mm diameter bars While the main aim of this study is to compare the performance of SFRC and plain concrete, it can be subdivided into the following objectives for ease of study: Studying the flexural strength of both SFRC and plain concrete beams and cubes Studying the compressive strength of both SFRC and plain concrete beams and cubes Comparing the flexural and bending failures The performance of the different beams and cubes made with SFRC is also compared based on the distribution of fiber in the concrete, and based on the shape of the fiber, i.e. HE and XR. Literature Review Influence of Fibers on Mechanical Properties of SFRC There are different types of steel fibers sold under various commercial names. Based on their manufacturing process, ...Show more
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Abstract It is seen that the use of steel fibers as reinforcements in concrete lends superior properties to the concrete structure. The mechanical properties such as the load-bearing capacity and flexural strengths are enhanced. Steel fiber reinforced concrete (SFRC) is more durable and exhibits creep resistance, higher durability, and has high resistance to crack propagation…
Steel fibre reinforced concrete
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