An Overview of Fiber Reinforced Concrete, FRC and Fibers Properties and Current Applications (original) (raw)

Properties and Applications of Fiber Reinforced Concrete

Fiber reinforced concrete (FRC) is a new structural material which is gaining increasing importance. Addition of fiber reinforcement in discrete form improves many engineering properties of concrete. Currently, very little research work is being conducted within the Kingdom using this new material. This paper describes the different types of fibers and the application of FRC in different areas. It also presents the result of research about the mechanical properties of FRC using straight as well as hooked steel fibers available in the region,

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.

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.

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.

Applications and Properties of Fibre Reinforced Concrete

In conventional concrete, micro-cracks develop before structure is loaded because of drying shrinkage and other causes of volume change. When the structure is loaded, the micro cracks open up and propagate because of development of such micro-cracks, results in inelastic deformation in concrete. Fibre reinforced concrete (FRC) is cementing concrete reinforced mixture with more or less randomly distributed small fibres. In the FRC, a numbers of small fibres are dispersed and distributed randomly in the concrete at the time of mixing, and thus improve concrete properties in all directions. The fibers help to transfer load to the internal micro cracks. FRC is cement based composite material that has been developed in recent years. It has been successfully used in construction with its excellent flexural-tensile strength, resistance to spitting, impact resistance and excellent permeability and frost resistance. It is an effective way to increase toughness, shock resistance and resistance to plastic shrinkage cracking of the mortar. These fibers have many benefits. Steel fibers can improve the structural strength to reduce in the heavy steel reinforcement requirement. Freeze thaw resistance of the concrete is improved. Durability of the concrete is improved to reduce in the crack widths. Polypropylene and Nylon fibers are used to improve the impact resistance. Many developments have been made in the fiber reinforced concrete.

Experimental studies on fiber reinforced concrete

The concepts of using fibres in order to reinforce matrices weak in tension is more than 4500 years old.since Portland cement concrete started to be used widely as a construction material attempts were made to use fibres for arresting cracks enhance the strength etc. The development of fibre reinforcement for concrete was very slow before 1960's. Fibers are generally used as resistance of cracking and strengthening of concrete. In this project we are going to compare the compressive strength of 3, 7 and 28 days of aramid fibres to the ordinary concrete and fibre reinforced concrete i.e. glass fibres and steel fibres. The concrete is design for M20 grade of concrete. According to various research papers, it has been found that steel fibers give the maximum strength in comparison and glass fibre is used for crack resistance but aramid simultaneously gives strength and can be used for crack resistance. Now a days there exists many reinforcement techniques for improving the strength of those materials which lacks load carrying and less durable capacity. Fiber reinforced concrete has been successfully used in slabs on grade, shotcrete, architectural panels, precast products, offshore structures, structures in seismic regions, thin and thick repairs, crash barriers, footings, hydraulic structures and many other applications. This review study is a trial of giving some highlights for inclusion of aramid fibers especially in terms of using them with new types of concrete.

A Review on Tensile Behavior of Different Kinds of Fiber Reinforced Concrete

Proceedings of International Exchange and Innovation Conference on Engineering & Sciences (IEICES)

With the development of science and technology of material in civil engineering, concrete has been the mostly used building material worldwide. Concrete, best known for its high compressive strength also has defects in some of its mechanical behaviors likely low tensile performance, bad toughness, low anti-cracking performance and so on. Inclusion of fibers in concrete can significantly improve its tensile performance. Researches and development efforts are being made to use different types of natural, metallic and synthetic fibers as reinforcement to fiber reinforced concrete (FRC) for better tensile performance. Despite such interest to use fibers in concrete structures, some doubts still remain regarding the influence of fibers on the tensile properties of concrete. The aim of this review paper is to provide a consolidated conclusion made from numerous researches to date on the tensile behavior of FRC, which have been conducted using different kind of fibers.

Comparative Performance Evaluation of Fiber Reinforced Concrete & Conventional Concrete

2020

All of us know that the normal concrete possess very low tensile strength, limited ductility and little resistance to cracking. So this focuses towards the experimental investigation of the mechanical properties of glass fiber reinforced concrete with conventional concrete. Fibers while delivered in certain percentage in the concrete improves the property as crack resistance, ductility, as flexural strength and durability. So for enhancing the durability of the structure we are the use of glass fiber. Glass-fiber reinforced concrete (GRFC) is a fabric product of a cementatious matrix composed of cement, sand, water and admixtures, wherein brief duration glass fibers are dispersed. It has been broadly used within the creation enterprise for non-structural factors, like façade panels, piping and channels. GRC gives many advantages, inclusive of being lightweight, heat resistance, appropriate look and strength. For this experimental work we are using glass fibers on the volume fractions of 0.5%, 1% and 2 %. After the casting of cubes, beams and cylinder with the above stated quantity fractions we can carry out specific test which include compressive strength, tensile strength and flexural strength respectively. After the completion of this work we compare the results of glass fiber strengthened concrete with that of the normal concrete. From evaluating those two we are able to see that how the addition of the fibers will have an effect on the mechanical properties of conventional concrete and we check that the addition of fibers improves the strength of concrete or not.

Behaviour of Fibre Reinforced Concrete: A Brief Review

It is a well known fact that concrete a composite material changes its behavior drastically with addition of cementitious and other admixtures. The researchers are trying to achieve a sustainable concrete which is eco friendly, economic and benefitting the society consuming minimum natural resources without compromising with its strength. Keeping all these requirements in focus Fiber Reinforced Concrete (FRC) is attracting researcher's attention in recent years. Although a lot of literature available on FRC using composites like; natural (cotton, jute, etc.), synthetic (made from chemicals) or a waste product, yet there is an urgent need to review the topic so as to find some research gap and to continue with an original research. This paper briefly reviews and evaluates the existing research on different fibers used to change the behavior of plane cement concrete as per desired characteristics. It will help a lot the future researchers to understand latest existing research in this area with critiques and comments.

High-performance fiber-reinforced concrete: a review

In recent years, an emerging technology termed, ''High-Performance Fiber-Reinforced Concrete (HPFRC)'' has become popular in the construction industry. The materials used in HPFRC depend on the desired characteristics and the availability of suitable local economic alternative materials. Concrete is a common building material, generally weak in tension, often ridden with cracks due to plastic and drying shrinkage. The introduction of short discrete fibers into the concrete can be used to counteract and prevent the propagation of cracks. Despite an increase in interest to use HPFRC in concrete structures, some doubts still remain regarding the effect of fibers on the properties of concrete. This paper presents the most comprehensive review to date on the mechanical, physical, and durability-related features of concrete. Specifically, this literature review aims to provide a comprehensive review of the mechanism of crack formation and propagation, compressive strength, modulus of elasticity, stress– strain behavior, tensile strength (TS), flexural strength, drying shrinkage, creep, electrical resistance, and chloride migration resistance of HPFRC. In general, the addition of fibers in high-performance concrete has been proven to improve the mechanical properties of concrete, particularly the TS, flexural strength, and ductility performance. Furthermore, incorporation of fibers in concrete results in reductions in the shrinkage and creep deformations of concrete. However, it has been shown that fibers may also have negative effects on some properties of concrete, such as the workability, which get reduced with the addition of steel fibers. The addition of fibers, particularly steel fibers, due to their conductivity leads to a significant reduction in the electrical resistivity of the concrete, and it also results in some reduction in the chloride penetration resistance of the concrete.