Fiber reinforced concrete is a type of concrete that includes fibrous substances that increase its structural strength and cohesion. Fibre reinforced concrete, hair fibre, compressive strength, flexural. In some cases a combination of the two types of steel and synthetic microfibres has been used. Test results for concretes obtained by using water blended with yeast granules are also reported in this paper. Naturally occurring asbestos fibers and vegetable fibers, such as sisal and jute, are also used for. Therefore, to promote the use of concrete reinforced with vegetable fibers could be a way to improve concrete durability and also sustainable construction. This rule applies to cheng dfrc and surecrete xtreme series concrete mixes keep in mind when mixing fiber reinforced concrete that grey cement based concrete mixes will have lower water requirements than white cement based products. Jyothi kumari, et al studied behavior of concrete beams reinforced with glass. The addition of fibres to the concrete should be in accordance with an agreed method statement, to ensure that the fibres are adequately distributed throughout the concrete, there are no fibre. Within fib federation internationale du beton, the special activity group 5 is preparing a new fib model code that aims to update the previous ceb. Structures are a combination of traditionally reinforced concrete and fibrereinforced concrete fig.
As soon as some tension is developed, it will lose its stiffness. Fibre reinforced concrete has started finding its place in many areas of civil infrastructure applications especially where the need for repairing, increased durability arises. Typical aspect ratios range from about 20 to 100, while. He is a member of aci committees 363, highstrength concrete. Steel fibre reinforced concrete sfrc is a composite material consisting of steel fibres and concrete. Cfs 1002 fibers are ideal for slab on grade applications. Fibers include steel fibers, glass fibers, synthetic fibers and natural fibers each of which lend varying properties to the concrete. Reinforcing concrete structures with fibre reinforced polymers isis canada research network the canadian network of centres of excellence on intelligent sensing for. The current experimental study analyses the prospects of working on human hair as a fiber reinforcement substance by studying and testing on concrete cubes. Fiberreinforced concrete frc is concrete containing fibrous material which increases its structural integrity.
Fibre is a small piece of reinforcing material which increases structural integrity. Degradable paper bags or containers can be put directly into the concrete truck or mixer, or they can be opened and the loose fibre dispensed. Structures are a combination of traditionally reinforced concrete and fibre reinforced concrete fig. The type of fibre andor packaging has a direct impact on how the fibres are dosed into the concrete. During the past two decades, there has been considerable interest in the study of fiber reinforced concrete and its appli cations to several types of structures. You can safely add up to 16 ounces of additional water for each 50 pound bag of fiber reinforced concrete mix you use. Drawings and general provisions of the contract, including general and supplementary conditions and division 01 specification sections, apply to this section. Jan 29, 2014 they also reduce the permeability of concrete and thus reduce bleeding of water.
Fibers with a small average diameter have corresponding low flexural stiffness and thus have a certain ability to conform to the shape of the space they occupy in the paste phase of the concrete mixture. At that time, it was considered to be one of the worlds most modern and straightforward handbooks on the design of steel fibre reinforced concrete structures. What is fibre reinforced concrete frc is a portland cement reinforced with more or less randomly distributed fibres. Steel fibre reinforced concrete as a structural material. Properties and applications offiber reinforced concrete faisal fouad wafa associate professor, civil engineering department, faculty ofengineering, king abdulaziz university, jeddah, saudi arabia.
And it is also observed that human hair as fiber reinforcement increases the compressive strength and tensile strength of concrete by 10. Properties and applications offiber reinforced concrete 51 high aspect ratio were found to have improved effectiveness. Concrete containing a hydraulic cement, water, fine or fine and coarse aggregate, and discontinuous discrete fibers is called fiberreinforced. Naturally occurring asbestos fibers and vegetable fibers, such as sisal and jute, are also used for reinforcement. Care should be taken to ensure proper dispersal and complete mixing. Since concrete is weak in tension hence some measures must be adopted to overcome this deficiency. Sep 10, 2009 although the use of fibre reinforced concrete frc for structural applications is continuously increasing, it is still limited with respect to its potentials, mainly due to the lack of international building codes for frc structural elements. Fibre reinforced concrete, hair fibre, compressive strength, flexural strength, thirdpoint loading method. Besides its ability to sustain loads, natural fibre reinforced concrete. Applications of fiber reinforced concrete in pavements. Properties and applications offiber reinforced concrete. The study conducted on fiber reinforced concrete with steel fibers of 0% and 0. Fiberreinforced concrete frc is concrete made primarily of hydraulic cements, aggregates, and discrete reinforcing fibers. Human hair fiber reinforced cement concrete ijrest.
S assistant professor, department of civil engineering, sri ramakrishna institute of technology, coimbatore 641 010, tamil nadu, india abstract concrete plays a vital role as a construction material in the world. The balling effect of fibres in frc is very undesirable. Received th november 2011, revised 10th january 2012, accepted 25th january 2012 abstract. Whilst natural fibres have been used to reinforce construction materials since time immemorial the use of straw in sundried mud bricks or the strengthening of. Experimental study on human hair fiber reinforced concrete with partial replacement of. Crack width profiles for fibrereinforced concrete elements with conventional reinforcement master of science thesis in the masters programme structural engineering and building technology niclas gorander christopher hallden department of civil and environmental engineering division of structural engineering concrete structures.
In general, when fibres are added to concrete, tensile strain in the neighbourhood of fibres improves significantly. Steel fibre composite floor another example of steel fibres application in the structural elements is a thin shell structure covered buildings located in the european oceanographic park in valencia. All these studies are limited to the normal strength concrete, and the research in the area of high performance concrete hpc and steel fibre reinforced high performance concrete sfrhpc beamcolumn joints is limited. Fiber reinforced concrete frc examination of fractured specimens of fiber reinforced concrete shows that failure takes place primarily due to fiber pullout or debonding. Frc is used in civil structures where corrosion is to be avoided at the maximum. Both concrete crushing and coirgfrp rupture are acceptable failure modes in governing the design of coirgfrp reinforced concrete members provided that strength and serviceability criteria are satisfied. S assistant professor, department of civil engineering, sri ramakrishna institute of technology, coimbatore 641 010, tamil nadu, india abstract concrete plays a vital role as a construction material in. In addition, the character of fiberreinforced concrete. Cfs 1002 astm type ii steel fibers for concrete reinforcement.
This paper compares the strength and durability of ordinary concrete with hair fibre reinforced concrete of m20 grade with 0%, 0. Tn kumar, k goutami, j aditya, k kavya, vr mahendar, et al. Thus unlike plain concrete, a fiber reinforced concrete specimen does not break immediately after initiation of the first crack. The commercial use of sfrc started in the late 1960s. Fiber reinforced concrete is used to improve the performance of concrete cracking and shrinkage problems.
Fiber reinforced concrete frc is a new structural material which is gaining increasing importance. Crack width profiles for fibre reinforced concrete elements. The possibility of substituting traditional transverse reinforcement stirrups for steel fibres in precast elements can significantly reduce production costs. Human hair as fibre reinforcement in concrete ijesc. The use of sisal fibre as reinforcement in cement based composites. Steel fibres are being costlier at present, frc becomes very expensive compared to r. Pdf the use of sisal fibre as reinforcement in cement. Crack width profiles for fibre reinforced concrete. Fibers suitable for reinforcing concrete have been produced from steel, glass, and organic polymers synthetic fibers. They also reduce the permeability of concrete and thus reduce bleeding of water. Study on concrete reinforced with human hair as fibre.
What are the disadvantages of fiber reinforced concrete. A thin and short fibre, for example short hairshaped glass fibre, will only be effective the first hours. Natural fibre reinforced concrete blocks david stephens, university of durbanwestville, south africa. Reinforcing concrete structures with fibre reinforced polymers. Cracks in reinforced concrete members extended freely until encountering a rebar. Shear capacity of steel fibre reinforced concrete beams. The experimental set up for various tests were described below. Fiberreinforced concrete smart materials and smart sensors aci fall 2011 convention october 16 20, cincinnati, oh aci web sessions antoine naaman, faci, is a professor in the department of civil and environmental engineering at the university of michigan. Fiber reinforced concrete frc is concrete containing fibrous material which increases as structural and is gaining importance.
Steel fiber reinforced concrete nguyen van chanh 1 summary it is now well established that one of the important properties of steel fibre reinforced concrete sfrc is its superior resistance to cracking and crack propagation. Itwas shown that for thesamelengthanddiameter,crimpedendfibers can achievethesamepropertiesas straight fibers using 40 percent less fibers s. Fiber reinforced concrete has all but completely replaced bar in underground construction industry such as tunnel segments where almost all tunnel linings are fiber reinforced in lieu of using rebar. Degradation of compressive properties of pultured kenaf fiber reinforced composites after immersion in. Fiber reinforced concrete types, properties and advantages. Crimped and hooked end steel fibre of length 50 mm and an aspect ratio equal to 50 was added to concrete in different proportions i. Providing and laying 40 mm steel fiber reinforced cement concrete in pavement in panels having area not more than 1. This masters thesis was carried out, between january 2011 and june 2011, at the. Fibers used are steel fibers, synthetic fibers, glass fibers, natural fibers, asbestos fibers and carbon fibers. As a result of this ability to arrest cracks, fibre composites possess. Hair fiber is an alternate nondegradable matter is available in abundance. Fiber reinforced concrete frc is portland cement concrete reinforced with more or less randomly distributed fibres 1. Over the decades, groundsupported floor slabs have been designed and built using steel to enhance concrete properties.
Fibre reinforced concrete can offer a convenient, practical and economical. You may have heard of gfrc which is an abbreviation for glass fiber reinforced concrete and perhaps the most common of all the frcs, but with new developments in fiber technology, many mixes are utilizing fibers made from. Introduction to steel fiber reinforced concrete on. Introduction almost everybody has heard about the concrete and knows that it is something which is used in construction of structures.
Tests concern beams with conventional as well as steel fibre reinforcement. Relative fibre matrix stiffness volume of fibres aspect ratio of the fibre fibre reinforced concrete. Thus unlike plain concrete, a fiberreinforced concrete specimen does not break immediately after initiation of the first crack. However, because of the inherent material properties of fibre concrete, the presence of fibres in the body of the concrete or the provision of a tensile skin of fibre concrete can be expected to improve the resistance of conventionally reinforced structural members to cracking, deflection and other serviceability conditions. Shear behaviour of steel fibre reinforced concrete beams. Although the use of fibre reinforced concrete frc for structural applications is continuously increasing, it is still limited with respect to its potentials, mainly due to the lack of international building codes for frc structural elements. Design of fibre reinforced concrete beams and slabs. However, although sfrc has shown great potential in structural applications, it is not widely used. Also, very fine hair fibers can be used for the partial replacement of cement in concrete. By the 1960s, steel, glass gfrc and synthetic fibres such as polypropylene fibres were used in concrete, and. Steelfibre composite floor another example of steel fibres application in the structural elements is a thin shell structure covered buildings located in the european oceanographic park in valencia.
Fibre reinforced concrete frc frc is a structural material having nearly the same cementitious matrix composites as a plain concrete pc except fibres of different types and forms. Sanghvi institute of management and science, indore, mp, india available online at. It contains short discrete fibers that are uniformly distributed and randomly oriented. Shear and punching resistance of steel fibre reinforced. Pdf effect of human hair as fibers in cement concrete. In the present paper, the shear behaviour of prestressed elements has been investigated by means of experimental tests on full scale beams. Fibre reinforced concrete is a mix that contain the same constituent of the plain concrete but in addition to fibres. While the increase in shear strength of steel fibre reinforced concrete sfrc is well recognized, it has yet to be found common application of this material in building structures and there is no existing national standard that treats sfrc in a systematic. Fiber reinforced concrete frc is concrete made primarily of hydraulic cements, aggregates, and discrete reinforcing fibers. Indeed, some fibers actually reduce the compressive strength of concrete. Pdf the use of sisal fibre as reinforcement in cement based. Confirming to is 5161959 15 in present work weigh batching hand mixing is used to study cube compression test, flexural test on beams, on plain and steel fibre reinforced concrete sfrc were carried on number of samples. Fiberreinforced concrete frc examination of fractured specimens of fiberreinforced concrete shows that failure takes place primarily due to fiber pullout or debonding.
Review on the performance of glass fiber reinforced concrete. By the 1960s, steel, glass gfrc and synthetic fibres such as polypropylene fibres were used in concrete, and research into new fibre reinforced concrete continues today. And also very few of us have heard about the fibre reinforced concrete. Hair fibre, an alternate nondegradable matter is available in abundance and at a very cheap cost. Fiber reinforced concrete is used when there is requirement for elimination small cracks.
Steel or macro synthetic fibres may be added to the concrete either at the readymixed plant or to the mixer truck on site. The swedish concrete association published a report on steel fibre reinforced concrete in 1995. Fibre reinforced concrete can offer a convenient, practical and economical method for overcoming microcracks and similar type of deficiencies. This research aims, to evaluate the effect of human hair waste material as fiber on plain concrete with various percentage of human hair fiber ie 0. Archanaa dongre 3 1 assistant pr ofessor, vid ya jyothi in stitute of technology, hyderabad, 500081. There was a need to find replacement for the asbestos used in concrete.