Properties and Applications of Fiber Reinforced Concrete (original) (raw)
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Experimental Study on The Steel Fiber Reinforcement Concrete
International Journal for Research in Applied Science & Engineering Technology (IJRASET), 2023
Concrete is one of the world most widely used construction material. However, since the early 1800's, it has been known that concrete is weak in tension. Weak tensile strength combined with brittle behavior result in sudden tensile failure without warning. This is obviously not desirable for any construction material. Thus, concrete requires some form of tensile reinforcement to compensate its brittle behavior and improve its tensile strength and strain capacity to be used in structural applications. Historically, steel has been used as the material of choice for tensile reinforcement in concrete. Unlike conventional reinforcing bars, which are specifically designed and placed in the tensile zone of the concrete member, fibers are thin, short and distributed randomly throughout the concrete member. Fibers are commercially available and manufactured from steel, plastic, glass and other natural materials. Steel fibers can be defined as discrete, short length of steel having ratio of its length to diameter (i.e. aspect ratio) in the range of 20 to 100 with any of the several cross-section, and that are sufficiently small to be easily and randomly dispersed in fresh concrete mix using conventional mixing procedure. The random distribution results in a loss of efficiency as compared to conventional rebars, but the closely spaced fibers improve toughness and tensile properties of concrete and help to control cracking. In many situations it is prudent to combine fiber reinforcement with conventional steel reinforcement to improve performance. Fibre Reinforced Concrete (FRC) is defined as a composite material essentially consisting of conventional concrete or mortar reinforced by the random dispersal of short, discontinious, and discrete fine fibres of specific geometry. Since Biblical times, approximately 3500 years ago, brittle building materials, e.g. clay sun baked bricks, were reinforced with horse-hair, straw and other vegetable fibres. Although reinforcing brittle materials with fibers is an old concept, modern day use of fibers in concrete is only started in the early 1960s. Realizing the improved properties of the fiber reinforced concrete products, further research and development on fiber reinforced concrete (FRC) has been initiated since the last three decades. This paper presents an overview of the mechanical properties of Steel Fiber Reinforced Concrete (SFRC), its advantages, and its applications.
Experimental and Analytical Investigation on Steel Fiber Reinforced Concrete
In this research, the mechanical properties of steel fiber reinforced concrete were investigated experimentally and the results compared with analytical models. Hooked end steel fibers of aspect ratio 50 were added at three proportions and compared with plain concrete. The fiber content is varied at 0%, 0.5%, 0.75%, 1% volume of concrete. The water cement ratio used was 0.51. Tests for compressive strength, flexure strength, splitting tensile strength, modulus of elasticity, impact test on cubes and impact test on slabs were conducted to investigate the influence of hooked end steel fibers in concrete. The experimental results for flexure test and impact test on slabs were compared with analytical results. Analytical study was conducted using commercially available finite element software, ABAQUS.
An Overview of Fiber Reinforced Concrete, FRC and Fibers Properties and Current Applications
2019
This paper focuses on the state-of-the-art research that has been done on Fiber-Reinforced Concrete (FRC) that are currently used in different applications to improve the concrete performance and provide new solution for concrete common problems. FRC is continually developed and many researches regarding to the enhancement of the concrete performance and strength. The past few years, concrete is considered as the most consumed construction material and the need of the properties development is necessary to mitigate the common problems of concrete. Different types of fibers will be described and discussed in this paper in addition to comparing the different types regarding to their efficiency, workability and cost. Furthermore, the structural behavior and mechanical of different types of FRC are going to be discussed and investigated as well as the FRC mixture components and placing methods. The various applications of FRC and current practices in the field of concrete industry prove...
Comparative Study on Fibre Reinforced Concrete
Concrete is a key ingredient that forms a major ingredient for all prestresses and prefabricated structural elements. For all structures are planned with a fine slenderness ratio. To maintain structural requirements and reduce CO2 emission from cement manufacturers, there is a huge demand for High-Performance Concrete. Fiber-reinforced Concrete is the major hope for HPC. To compare the best FRC, we are comparing the strength behavior & good composition results of various metallic and synthetic FRCs from works of literature. And the results of FRC with the best composition were taken to find the best FRC with specified strength.
Performance of Fiber Reinforced Concrete and Conventional Concrete: A Review
The importance of concrete in development of civilized world can be known from the fact that, concrete is most widely used man-made material on planet and consumption of concrete in world per capita is around 1 ton. Being such a important construction material enhancement of its strength and durability is prime need of hour only by the way of its research and development. The fiber reinforced concrete is collective mixture of primary constituent of concrete such as cement, sand, aggregate, and add on constituent containing short and discrete fiber which can be steel, polypropylene, polythene, nylon etc. Presently there is necessity to find a material or composite material to improve the strength of concrete and its effective utilization. Hence attempt has been made in present quest to study impact of addition of composite fibrous material like steel and polypropylene together as 1% and 1.5% of concrete weight as fiber. The present paper analyzes various researches made on FRC till date and summarizes it useful results and outcomes. The consolidated data from review of these papers is helpful in predicting the behaviour of composite FRC and expected outcomes.
STEEL FIBER REINFORCED CONCRETE A REVIEW
Extensively used material in construction industry is concrete this is because of good workability and ability to be moulded to any shape. Ordinary cement concrete possesses very low tensile strength, limited ductility and less resistance to cracking. The concrete shows the brittle behaviour and fails to handle tensile loading hence leads to internal micro cracks which are mainly responsible for brittle failure of concrete. In this era, RCC constructions have their own structural and durability requirements, every structure has its own intended purpose and hence to meet this purpose, modification in traditional cement concrete has become mandatory. It has been proved that different type of fibers added in specific percentage to concrete improves the mechanical properties, durability and serviceability of the structure. As compared to other fibers it is now established that one of the important properties of Steel Fiber Reinforced Concrete (SFRC) is its superior resistance to cracking and crack propagation. In this paper Past studies based on the Steel fiber concrete is studied in detail.
Extensively used material in construction industry is concrete this is because of good workability and ability to be moulded to any shape. Ordinary cement concrete possesses very low tensile strength, limited ductility and less resistance to cracking. The concrete shows the brittle behaviour and fails to handle tensile loading hence leads to internal micro cracks which are mainly responsible for brittle failure of concrete. In this era, RCC constructions have their own structural and durability requirements, every structure has its own intended purpose and hence to meet this purpose, modification in traditional cement concrete has become mandatory. It has been proved that different type of fibers added in specific percentage to concrete improves the mechanical properties, durability and serviceability of the structure. As compared to other fibers it is now established that one of the important properties of Steel Fiber Reinforced Concrete (SFRC) is its superior resistance to crackin...
Comparison Of Mechanical Properties Of Steel Fiber-Reinforced Concrete And Normal Concrete
2020
Abstract: In order to be useful in construction, the product must meet minimum compressive requirements, which are determined through a Mechanical Test of Concrete and to check the strength of the concrete used for buildings and other structures, where the principal stresses are compressive, cube samples were obtained and tested in compression testing machine. As Pillars, beams and pipes needs high values of strength, different types of materials have been explored in order to increase life of such structures. Steel reinforcement is widely used in which cages of steel bars are used along with concrete. The use of steel fibers which are very smaller in size and diameter are also becomes familiar in these days. In present work, two types of steel fibers s named as straight and crimped steel fibers has been investigated in Mix 25 concrete design mix by proportion with weight of cement. Compressive strength and flexural strength tests are carried out on designed concrete mixes in which ...
Experimental investigation on steel fiber reinforced concrete
Fiber reinforced concrete may be defined as composite materials made with cement, aggregate and incorporating discrete discontinuous fibers. Now, why would we wish to add such fibers in to concrete Plain, unreinforced concrete is a brittle material, with low tensile strength and low strain capacity. The role of random distribution of discontinuous fibers is to be bridge across the cracks develop provides some post cracking ductility. If the fibers are sufficiently strong, sufficiently bonded to material, and permit the FRC to carry significant stresses over a relative large stain capacity in the post cracking stage.
EXPERIMENTAL STUDIES ON FIBER REINFORCED CONCRETE (FRC
Concrete is one of the most widely recognized development material for the most part delivered by utilizing locally accessible ingredients. The present trend in concrete technology is towards increasing the strength and durability of concrete to meet the demands of the modern construction. The main aim of the study is to study the effect of glass fibre and steel fibers in the concrete. FRC has the high tensile strength and fire resistant properties thus reducing the loss of damage during fire accidents. In the present work the strength studies are carried out to compare the glass and steel fiber concrete. The FRC is added 0.5, 1, 2 and 3% are added for M20 grade concrete. Result shows the percentage increase in compressive strength, flexural strength and split tensile strength for 28days.