Fibers suitable for reinforcing concrete have been produced from steel, glass, and organic polymers synthetic fibers. It holds short discrete fibers that are uniformly distributed and circumstances oriented. Improvement in concrete properties such as workability, durability, strength, and dimensional stability should result in longlasting, safe, and economical structures. The study conducted on fiber reinforced concrete with steel fibers of 0% and 0. Sumit thakur civil fiberreinforced concrete frc seminar and ppt with pdf report.
Plain and reinforced concrete targets subjected to projectile impact. Steel fiber, concrete, properties, crack, ductility, technology. Fiber reinforced concrete and admixtures because concrete is versatile, it is an ideal material to adapt for special applications and to meet the tough demands of the building industry. Steel fiber reinforced concrete panels subjected to impact projectiles with different caliber sizes and muzzle energies article pdf available in case studies in construction materials april. Numerical analysis of projectile penetration and perforation of plain. 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 tensile strength of concrete is very low because plain concrete normally. Design of fibre reinforced concrete beams and slabs.
Thus unlike plain concrete, a fiber reinforced concrete specimen does not break immediately after initiation of the first crack. Factors affecting durability of fiber reinforced concrete. Comparative numerical studies of projectile impacts on plain and. Therefore, to promote the use of concrete reinforced with vegetable fibers could be a way to improve concrete durability and also sustainable construction. The effects of maximum aggregate size, elastic modulus of the projectile, strain rate of concrete, thickness of the concrete target, concrete.
The local fracture of the concrete caused by a projectile impact is primarily affected by two factors. Evaluation of ultrahighperformance fiberreinforced concrete. 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. Ultra high strength fiber reinforced concrete using aramid fiber. Prediction of hard projectile penetration on concr ete targets hyeonjong hwang1, sanghee kim2, and thomas kang3. Properties and applications offiber reinforced concrete faisal fouad wafa associate professor, civil engineering department, faculty ofengineering, king abdulaziz university, jeddah, saudi arabia. 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. In this article, the response of nine plain concrete panels to an impact of. It requires less water to grow because kenaf fiber has a growing cycle of 150 to 180 days with an average yield of 1700kgha 10.
Therefore, more studies on the concrete target penetration or perforation tests using projectiles with weights of several kilograms and velocities of at least ms. This masters thesis was carried out, between january 2011 and june 2011, at the. For this, a drop weight test was performed on the 28 days cured plain and fibre reinforced concrete samples as per the testing procedure recommended by aci committee 544. Steel fibre reinforced concrete, nguyen van chan studies on steel fibre reinforced concrete a sustainable approach, vasudev r, dr. Report date april 2001 the flexural capacity of reinforced concrete beams 6. Hpc may be defined as any concrete that provides enhanced performance characteristics for a given application zia et al.
Fiber reinforced concrete and admixtures concrete materials. The swedish concrete association published a report on steel fibre reinforced concrete in 1995. Increasingly, fibers are being used to replace temperature and shrinkage reinforcement in concrete and, in some applications, prim ary reinforcement. Balasubramanian cement and concrete matrices reinforced with randomly oriented short fibers are finding increasing applications in both precast and in situ concrete construction.
Prediction of hard projectile penetration on concrete targets hyeon. There are various factors which affects the durability of fiber reinforced concrete such as temperature, weathering, corrosion, freezing and thawing etc. During their service life concrete and reinforced concrete structures may be. Because concrete cannot be prevented from cracking, the goal is to keep the cracks tightly closed in order to maintain longterm durability. Frc offers several advantages over rebar or wire mesh reinforced concrete including increased crack resistance, ductility, energy absorption, impact resistance and residual strength. Fiber reinforced concrete frc is concrete made primarily of hydraulic cements, aggregates, and discrete reinforcing fibers. Rebar reinforced concrete uses steel bars that are laid within the liquid cement, which requires a great deal of prep work but make for a much stronger concrete.
The steel fibers are mostly used fiber for fiber reinforced concrete out of available fibers in market. Frc can also significantly lower materials and labor costs compared to rebar or wire mesh reinforced concrete. Current research and applications of fiber reinforced concrete composites in india v. To predict the penetration depth of concrete targets, petry et al. Types of fiber reinforced concrete steel fiber reinforced concrete steel fiber reinforced concrete is basically a cheaper and easier to use form of rebar reinforced 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. Properties and applications offiber reinforced concrete 51 high aspect ratio were found to have improved effectiveness. 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. Fiber reinforced concrete are of different types and properties with many advantages.
The subject of fiber reinforced concrete has not been covered in previous editions of astm stp 169 mainly because astm standard specifications and test methods relating to it have only been developed since the formation in 1980 of subcommittee c09. As a result of this ability to arrest cracks, fibre composites possess. Review on the performance of glass fiber reinforced concrete. Fiberreinforced concrete is generally made with a high cement content and low watercement ratio 9. Steel fibres reinforced concrete against impact forces, thereby improving the toughness characteristics of hardened concrete. Test results for concretes obtained by using water blended with yeast granules are also reported in this paper. Oct 21, 2014 the fibre reinforced concrete has been provided in small panels considering the workability. Since the mid 1800s steel reinforcing has been used to overcome this problem. Response of hybridfiber reinforced concrete slabs to hard. The objective of this contract is to explore optical design concepts for th.
Now, why would we wish to add such fibres to concrete. Dec 07, 2015 natural fibre reinforced concrete, ben davis, dr. On the basis of the energy conservation law, the penetration depth of a projectile is estimated. Properties and applications offiber reinforced concrete. Fiber reinforced concrete frc is finding increased use in construction. Fip 8 design and specification of fiberreinforced concrete. Numerical and experimental study of concrete structures exposed to. Current research and applications of fiber reinforced. This page contains fiberreinforced concrete frc seminar and ppt with pdf report. Kenaf fiber is obtained from stems of plants genus hibiscus, family of malvaceae and the species of h. Natural fibre composites for structural applications, shamaparveen, sohelrana, raul fangueiro, 2012.
Jyothi kumari, et al studied behavior of concrete beams reinforced with glass. Fracture mechanics of concrete and concrete structures high performance, fiber reinforced conc rete, special loadings and structural applications b. National seminar on advance in construction materials, 1415 feb. Fresh and hardened properties of steel fiber reinforced concrete produced with fibers of different lengths and diameters conference paper pdf available may 20 with 3,200 reads how we. Astm c1609 flexural testing of fiberreinforced concrete beams. Applications and properties of fibre reinforced concrete. Stainless steel balls were used as the projectiles. Terrorists attack and explosion accidents have caused the damage in reinforced concrete structures, which requires the impact resistant design of concrete structures. The ballistic performance of plain concrete and reinforced concrete targets of unconfined compressive strength 40 mpa was studied against projectile impact. Parametric study on local impact damage of concrete members. Improving the resistance of concrete panels to hard projectile impact. Use of carbon fiber reinforced polymer composites to increase 5. Fiber reinforced concrete has small distinct fibers that are homogeneously dispersed and oriented haphazardly.
As a composite system, the reinforcing steel is designed to carry the tensile loads. Steel fiber reinforced concrete faq when subjected to tensile stress, unreinforced concrete will crack and fail. Several useful documents on fiber reinforced concrete frc have been developed by aci committee 544, fiber reinforced concrete, including a design guide, aci 544. Fiber reinforced concrete types, properties and advantages. Indeed, some fibers actually reduce the compressive strength of concrete. Comparative study of steel fiber reinforced over control concrete. Fiber reinforced concrete frc is a new structural material which is gaining increasing importance. 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. The largest application for steel fiber reinforced concrete is floor slab construction, although it. At concrete materials, weve made it our business to respond to these demands with a variety of concrete admixtures for your projects including but not. Use of carbon fiber reinforced polymer composites to increase. Itwas shown that for thesamelengthanddiameter,crimpedendfibers can achievethesamepropertiesas straight fibers using 40 percent less fibers s. Pdf fresh and hardened properties of steel fiber reinforced.
Durability of concrete element is the ability of the member to resist aggressive environment, accidental event, and impact effect and maintain the structural integrity. Introduction fibre reinforced concrete frc may be defined as a composite materials made with portland cement, aggregate, and incorporating discrete discontinuous fibres. Fibers used are steel fibers, synthetic fibers, glass fibers, natural fibers, asbestos fibers and carbon fibers. To understand the effect of incorporation of polypropylene and steel fibers together in the hardened state of concrete. Thank you for sharing great overview on fiber reinforced concrete. This is a pdf file of an unedited manuscript that has been accepted for. Nasa technical reports server ntrs chipman, russell a. Crimped and hooked end steel fibre of length 50 mm and an aspect ratio. In this study, steel fiber reinforced concrete panels subjected to projectile impact loads with different geometries was investigated. Pdf steel fiber reinforced concrete panels subjected to. Fiber reinforced concrete is a type of concrete that includes fibrous substances that increase its structural strength and cohesion. Prediction of hard projectile penetration on concrete targets.
Fiber reinforced concrete frc examination of fractured specimens of fiber reinforced concrete shows that failure takes place primarily due to fiber pullout or debonding. Steel fiber reinforced concrete panels subjected to impact. He is a member of aci committees 363, highstrength concrete. The projectile impact velocity ranged from 60 fts to 450 fts. Strain behavior of concrete panels subjected to different nose. Pdf download for improving the resistance of concrete panels to. An experimental investigation on the behaviour of steel fibre reinforced ternary blended concrete subjected to sustained elevated temperature.
Fiberreinforced concrete frc is concrete consisting fibrous material which increases its structural purity. 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. Advancing the seismic design of reinforced concrete bridge. Fiberreinforced concrete seminar ppt with pdf report. Fiber reinforced concrete contains only fine sands, portland cement, fibers, and chemistry to accelerate its cure time. The impactors in the form of bullets came in three different caliber sizes 9, 11, and 7. Fiber reinforced concrete fiber reinforced concrete enhances the durability of concrete by reducing crack width typically due to plastic shrinkage, long term drying shrinkage and thermal changes. Continuous meshes, woven fabrics and long wires or rods are not considered. Introduction to steel fiber reinforced concrete on. Highvelocity penetration of concrete targets with three types of. Summary the research presented in this paper deals with the numerical analysis of projectile impact on regular strength concrete rsc. Advancing the seismic design of reinforced concrete bridge column free ebook download as pdf file. Naturally occurring asbestos fibers and vegetable fibers, such as sisal and jute, are also used for.
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