The fibre test results indicated that the inclusion of fibre to the pervious concrete mixes did not affect the compressive strength significantly, while the splitting tensile strength and the modulus of. S k 2008, use of coconut of fibre as an enhancement of concrete. A comparison between the static and dynamic moduli was conducted. It has been observed that the main parameters which influence the behavior of sfrc beams and slabs would depend on aspect ratio length diameter, shape and orientation of fibres, size of aggregates and the size of. Coconut fibre is extracted from the outer shell of a coconut. 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. This study has examined the flexural properties of natural and chemically modified coir fiber reinforced cementitious composites cfrcc.
The adoption of inherent fibres as edifice constituents is boon to procure a livable production. Among natural fibres, coir fibre has maximum amount of lignin giving maximum tensile strength as well as are durable in nature. They also reduce the permeability of concrete and thus reduce bleeding of water. By compare with other types of concrete coconut fiberreinforced concrete is also strong and ideal for hard use. The use of coconut fibre in the production of structural.
Pdf research on coir fiber reinforced cement concrete. Fibers suitable for reinforcing concrete have been produced from steel, glass, and organic polymers synthetic fibers. Fiber reinforced concrete frc is a new structural material which is gaining increasing importance. The addition of coconut fibre in concrete improves various engineering properties of concrete. Natural fibre reinforced concrete blocks david stephens, university of durbanwestville, south africa. He is a member of aci committees 363, highstrength concrete. Fiberreinforced concrete frc is concrete consisting fibrous material which increases its structural purity. Table 8 flexural strength of concrete pcc beam beam specimens load kn flexural strength nmm2 control 14. Saikumar 1assistant professor, faculty, department of civil engineering, sri sai ram institute of technology, india 2,3,4 under graduate students, department of civil engineering, sri sai ram institute of technology, india. The main objectives of the study are to develop coir fibre reinforced cement concrete roof tiles and to seek its pros and cons as a roofing material based on standard specifications. Experimental study of coir fiber as concrete reinforcement. Ftir analyses were performed by using an ftir spectrometer. So in a matrix, it can make strong bond with other materials.
Compressive strength of concrete made with coir fibre by keeping fly ash 10% constant for all mixes given in table no. Concrete is weak in tension and has a brittle character. Fiber reinforced concrete has small distinct fibers that are homogeneously dispersed and oriented haphazardly. Application of coir fibres as concrete composites for disaster prone structures abstract investigations to overcome the brittle response and limiting post yield energy absorption of concrete led to the development of fibre reinforced concrete using discrete fibres within the concrete mass. 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. Static properties of plain concrete pc and coir fibre reinforced concrete cfrc are presented in table 1. For this purpose, the received in revised form 12 december 2011 mechanical and dynamic properties of coconut. Coir fibre reinforcement and application in polymer. Dynamic and static properties of flax fibre reinforced. Table 1 shows the concrete mix quantities of coir and raffia fibre reinforced concrete mixes for 0. Due to its less expensiveness, flexibility most of the coconut coir based concrete now getting much popular. The concrete prism specimens are made as fibre reinforced concrete by adding both coir fibres and by adding fibres in each specimen.
Fibers used are steel fibers, synthetic fibers, glass fibers, natural fibers, asbestos fibers and carbon fibers. In axial compression, two types of ffrp and concrete bond were considered, i. Fiber reinforced concrete can be defined as a composite material consisting of mixtures of cement, mortar or concrete and discontinuous, discrete, uniformly dispersed suitable fibers. The concept of using fibers to improve the characteristics of construction materials. The compressive strength was determined after 3, 7, 14 and 28 days. The design procedure of steel fibre reinforced concrete sfrc members have been developed based on various research works by complimenting procedure for the fibre contribution. Plain concrete specimens with 0% fibre content were used as control. Cracks in reinforced concrete members extended freely until encountering a rebar.
In this paper, coir fibre is considered which is the natural fiber of the coconut husk where it is thick, coarse and durable fiber. Using coir fibre in civil construction reduces environmental pollution factors and may also bring several improvements in concrete characteristics. Sumit thakur civil fiberreinforced concrete frc seminar and ppt with pdf report. It holds short discrete fibers that are uniformly distributed and circumstances oriented. Compressive strength, flexural strength, coir fiber, fiber, reinforced concrete introduction. Application of sisal, bamboo, coir and jute natural. Experimental investigation on coir fibre reinforced. Experimental study of coir fiber as concrete reinforcement material incement based composites. The effect of coconut fibre content on the mechanical properties and fracture behavior of reinforced concrete was studied. Pdf coconut fibre reinforced concrete researchgate. Pdf analysing the effect of coconut fibre on strength of concrete find, read and cite all the research you need on researchgate. Fiber reinforced concrete is used when there is requirement for elimination small cracks.
Small piece of reinforcing material possessing certain characteristic properties. Properties and applications offiber reinforced concrete faisal fouad wafa associate professor, civil engineering department, faculty ofengineering, king abdulaziz university, jeddah, saudi arabia. This study investigates the effect of coir fibre inclusion and flax fibre reinforced polymer thickness on the dynamic and static properties of flax fibre reinforced polymer tube confined coir fibre reinforced concrete. Use of coconut fiber coir should be valued over steel for the following reasons like low cost, recyclability, non corrosiveness, low thermal conductivity natural. The influence of 1%, 2%, 3% and 5% fibre contents by mass of cement and fibre lengths of 2. The common name, scientific name and plant family of coconut fiber is coir, cocos nucifera and. The mix design used for the plain concrete and the coconut fibre reinforced concrete was based on 1. There is the recent development of producing concrete by use of coconut coir based fiber. Although glass and other synthetic fibrereinforced plastics possess high specific strength, their fields of application are very limited because of their inherent higher cost of production. Eighteen cylinders were tested under uniaxial compression and 12 beams were tested under fourpoint bending.
Besides its ability to sustain loads, natural fibre reinforced concrete. In this connection, an investigation has been carried out to make use of coir. The load carrying capacity, deflections of coir fibres are more than that of. Introduction for developing regions in africa where conventional fibres are elusive, the need to search for similar alternatives cannot be overemphasised. The flexural strength on coir fibre reinforced concrete is given in table 5. The compressive strength of conventional concrete is more than coir fibre reinforced concrete but at 0. Thus, it will prevent bubbles from merging with each other and provide a uniform coating on each of bubbles. The structural behaviour and strength characteristic of coir fibre reinforced tile were compared with cement concrete roofing tiles. The coconut fibre was added as reinforcement principally to check the propagation of cracks. 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. Properties and applications offiber reinforced concrete.
This fiber has the best toughness among all natural fibres. Conventional concrete is robust in compression and weak in tension in order to swamp the weakness natural fibre is being equipped. Study on the effect of coir fibre in the bituminous. Fiberreinforced concrete seminar ppt with pdf report. Fiber reinforced concrete types, properties and advantages. Among the various natural fibres, sisal fibre reinforced composite, bamboo fibre reinforced composite, coir reinforced composite and jute fibre reinforced composite are of particular interest as these composites have high impact strength besides having moderate tensile and flexural properties compared to other lignocellulosic fibres. Fracture parameters of coir fibre reinforced concrete. The fibers were combined with cementitious materials and chemical agents dispersant, defoamer or wetting.
Coir fibers of two different average lengths were used, and the longer coir fibers were also treated with a 1 % naoh solution for comparison. Rice husk ash is a waste product of the rice mills. Fiber reinforced concrete are of different types and properties with many advantages. A comparative strength study of coir fibre reinforced concrete. Pdf mechanical and dynamic properties of coconut fibre. Fiberreinforced concrete frc is concrete made primarily of hydraulic cements, aggregates, and discrete reinforcing fibers. There is a slight decrease in compressive strength.
These coir fibres have the tendency to be used as reinforcement in low cost concrete. Coconut fibre is a waste material which can be utilized as fibre in fibre reinforced concrete, if we used it the. Encouragement should be given for the use of natural fibres which are locally available materials, in the field of civil engineering. Test results for concretes obtained by using water blended with yeast granules are also reported in this paper. Pdf experimental investigation on coir fibre reinforced. A comparative study of flexural strength of concrete. Strength properties of coconut fibre reinforced concrete. Coir fibre and rope reinforced concrete beam under.
Coconut and sisalfibre reinforced concrete have been used for making roof tiles, corrugated sheets, pipes, silos and tanks agopyan, 1988. Pdf the use of coconut fibre as an additive for improving the strength of concrete find, read and cite all the research you need on researchgate. Coconut fibre is treated as natural fiber before using in concrete. Mechanical and durability properties for coir fibre reinforce concrete 1483 journal of engineering science and technology june 2019, vol. By considering the spectrum of untreated coir fiber as the reference to verify the effectiveness of the treatments carried out on the fiber, for the spectrum of alkalinized fibers, for the appearance of new bands such as a 1050cm. And we used coconut fibre also known as coir fibre. Use of reinforcement in concrete reinforced concrete increases strength and ductility but requires. Fiber reinforced concrete is a type of concrete that includes fibrous substances that increase its structural strength and cohesion. There are two types of coconut fibres, brown fibre extracted from matured. Mechanical properties and fracture behaviour of coconut.
Development of coirfibre cement composite roofing tiles. It has also been observed that the surface of coconut fibre is not smooth refer to fig. In present day constructions, the use of admixtures has increased for achieving various properties which cannot be achieved by conventional concrete. Typical aspect ratio for fibers ranges from 30 to 150. The flexural strength increase with increase in the fibre content 3. Download limit exceeded you have exceeded your daily download allowance. Fly coir fibre also helps in producing a more uniform distribution of the air voids. As a result of this ability to arrest cracks, fibre composites possess. This page contains fiberreinforced concrete frc seminar and ppt with pdf report. The common name, scientific name and plant family of coconut fibre is coir. Flax and coir fibres have the potential to be used as reinforcement in fibre reinforced polymer and concrete, respectively. Aspect ratio is ratio of its length to its diameter. Continuous meshes, woven fabrics and long wires or rods are not considered.
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