Pdf experimental investigation on coir fibre reinforced. Coconut and sisalfibre reinforced concrete have been used for making roof tiles, corrugated sheets, pipes, silos and tanks agopyan, 1988. The influence of 1%, 2%, 3% and 5% fibre contents by mass of cement and fibre lengths of 2. A comparison between the static and dynamic moduli was conducted. Dynamic and static properties of flax fibre reinforced. The flexural strength increase with increase in the fibre content 3.
Development of coirfibre cement composite roofing tiles. Coir fibre and rope reinforced concrete beam under. Mechanical and durability properties for coir fibre reinforce concrete 1483 journal of engineering science and technology june 2019, vol. 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. Experimental study of coir fiber as concrete reinforcement. The common name, scientific name and plant family of coconut fiber is coir, cocos nucifera and. Fiber reinforced concrete is used when there is requirement for elimination small cracks. The structural behaviour and strength characteristic of coir fibre reinforced tile were compared with cement concrete roofing tiles. Fiberreinforced concrete frc is concrete consisting fibrous material which increases its structural purity. Sumit thakur civil fiberreinforced concrete frc seminar and ppt with pdf report.
Typical aspect ratio for fibers ranges from 30 to 150. The flexural strength on coir fibre reinforced concrete is given in table 5. Mechanical properties and fracture behaviour of coconut. 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. Fiber reinforced concrete has small distinct fibers that are homogeneously dispersed and oriented haphazardly. Application of sisal, bamboo, coir and jute natural. The concrete prism specimens are made as fibre reinforced concrete by adding both coir fibres and by adding fibres in each specimen. The compressive strength was determined after 3, 7, 14 and 28 days. The mass content of coir fibre considered was 1% of cement. 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. Encouragement should be given for the use of natural fibres which are locally available materials, in the field of civil engineering. They also reduce the permeability of concrete and thus reduce bleeding of water. Fiber reinforced concrete is a type of concrete that includes fibrous substances that increase its structural strength and cohesion.
Main objectives of the present study are x to develop lightweight concrete roofing tiles with coir reinforced cement concrete composite. This page contains fiberreinforced concrete frc seminar and ppt with pdf report. Besides its ability to sustain loads, natural fibre reinforced concrete. Coconut fibre is a waste material which can be utilized as fibre in fibre reinforced concrete, if we used it the. Due to its less expensiveness, flexibility most of the coconut coir based concrete now getting much popular. With regard to dynamic properties of cfrc, no study has been. Use of reinforcement in concrete reinforced concrete increases strength and ductility but requires.
Pdf mechanical and dynamic properties of coconut fibre. Coir fibers of two different average lengths were used, and the longer coir fibers were also treated with a 1 % naoh solution for comparison. 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. Rice husk ash is a waste product of the rice mills. The effect of coconut fibre content on the mechanical properties and fracture behavior of reinforced concrete was studied.
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. The fibers were combined with cementitious materials and chemical agents dispersant, defoamer or wetting. A comparative strength study of coir fibre reinforced concrete. Fiber reinforced concrete frc is a new structural material which is gaining increasing importance. Pdf analysing the effect of coconut fibre on strength of concrete find, read and cite all the research you need on researchgate. Naturally occurring asbestos fibers and vegetable fibers, such as sisal and jute, are also used for reinforcement.
As a result of this ability to arrest cracks, fibre composites possess. This fiber has the best toughness among all natural fibres. In present day constructions, the use of admixtures has increased for achieving various properties which cannot be achieved by conventional concrete. Conventional concrete is robust in compression and weak in tension in order to swamp the weakness natural fibre is being equipped. 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. Application of coir fibres as concrete composites for.
He is a member of aci committees 363, highstrength concrete. Compressive strength, flexural strength, coir fiber, fiber, reinforced concrete introduction. Experimental study of coir fiber as concrete reinforcement material incement based composites. In this connection, an investigation has been carried out to make use of coir. So in a matrix, it can make strong bond with other materials. Fiberreinforced concrete frc is concrete made primarily of hydraulic cements, aggregates, and discrete reinforcing fibers. Fly coir fibre also helps in producing a more uniform distribution of the air voids. Natural fibre reinforced concrete blocks david stephens, university of durbanwestville, south africa. The mix design used for the plain concrete and the coconut fibre reinforced concrete was based on 1. The coconut fibre was added as reinforcement principally to check the propagation of cracks.
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. Test results for concretes obtained by using water blended with yeast granules are also reported in this paper. Cracks in reinforced concrete members extended freely until encountering a rebar. Properties and applications offiber reinforced concrete faisal fouad wafa associate professor, civil engineering department, faculty ofengineering, king abdulaziz university, jeddah, saudi arabia. 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. A comparative study of flexural strength of concrete. Ftir analyses were performed by using an ftir spectrometer. The use of coconut fibre in the production of structural. Experimental investigation on coir fibre reinforced.
Fiber reinforced concrete types, properties and advantages. Small piece of reinforcing material possessing certain characteristic properties. Coconut fibre is extracted from the outer shell of a coconut. Using coir fibre in civil construction reduces environmental pollution factors and may also bring several improvements in concrete characteristics. 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. 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. Experimental study on the mechanical properties of coconut. Flax and coir fibres have the potential to be used as reinforcement in fibre reinforced polymer and concrete, respectively. Plain concrete specimens with 0% fibre content were used as control. The addition of coconut fibre in concrete improves various engineering properties of concrete. The adoption of inherent fibres as edifice constituents is boon to procure a livable production.
The common name, scientific name and plant family of coconut fibre is coir. Fiberreinforced concrete seminar ppt with pdf report. Coir fibre reinforcement and application in polymer. In axial compression, two types of ffrp and concrete bond were considered, i. By compare with other types of concrete coconut fiberreinforced concrete is also strong and ideal for hard use. The compressive strength of conventional concrete is more than coir fibre reinforced concrete but at 0. Strength properties of coconut fibre reinforced concrete. Coconut fibre is treated as natural fiber before using in concrete. Download limit exceeded you have exceeded your daily download allowance. The load carrying capacity, deflections of coir fibres are more than that of. Eighteen cylinders were tested under uniaxial compression and 12 beams were tested under fourpoint bending. Concrete is weak in tension and has a brittle character. These coir fibres have the tendency to be used as reinforcement in low cost concrete.
Static properties of plain concrete pc and coir fibre reinforced concrete cfrc are presented in table 1. Fibers used are steel fibers, synthetic fibers, glass fibers, natural fibers, asbestos fibers and carbon fibers. Compressive strength of concrete made with coir fibre by keeping fly ash 10% constant for all mixes given in table no. 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. Table 1 shows the concrete mix quantities of coir and raffia fibre reinforced concrete mixes for 0. And we used coconut fibre also known as coir fibre. Archanaa dongre 3 1 assistant pr ofessor, vid ya jyothi in stitute of technology, hyderabad, 500081. Table 8 flexural strength of concrete pcc beam beam specimens load kn flexural strength nmm2 control 14. Thus, it will prevent bubbles from merging with each other and provide a uniform coating on each of bubbles. 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. 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. Fibers suitable for reinforcing concrete have been produced from steel, glass, and organic polymers synthetic fibers.
There is the recent development of producing concrete by use of coconut coir based fiber. In this paper, coir fibre is considered which is the natural fiber of the coconut husk where it is thick, coarse and durable fiber. 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. It has also been observed that the surface of coconut fibre is not smooth refer to fig. Properties and applications offiber reinforced concrete. This study has examined the flexural properties of natural and chemically modified coir fiber reinforced cementitious composites cfrcc. Aspect ratio is ratio of its length to its diameter. Use of coconut fiber coir should be valued over steel for the following reasons like low cost, recyclability, non corrosiveness, low thermal conductivity natural. For this purpose, the received in revised form 12 december 2011 mechanical and dynamic properties of coconut. Pdf coconut fibre reinforced concrete researchgate. There are two types of coconut fibres, brown fibre extracted from matured. Among natural fibres, coir fibre has maximum amount of lignin giving maximum tensile strength as well as are durable in nature. Continuous meshes, woven fabrics and long wires or rods are not considered. It holds short discrete fibers that are uniformly distributed and circumstances oriented.
264 645 1460 885 37 790 1180 958 1515 330 328 1436 311 714 531 492 266 571 111 95 1245 919 995 1197 140 716 520 353 328 1207 632 107 1207 453 1350 1251 879 324