Applications and properties of fibre reinforced concrete. The use of fiber reinforced concrete frc has passed from. Numerical analysis of projectile penetration and perforation of plain. Introduction fibre reinforced concrete frc may be defined as a composite materials made with portland cement, aggregate, and incorporating discrete discontinuous fibres. The ace 1946 evaluated the allowable concrete target thickness that limits. Fiber reinforced concrete types, properties and advantages.
An investigation on fibre concrete slabs subjected to low velocity projectile impact was carried out to assess impact resistance. 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. Resistance of fibre concrete slabs to low velocity. Fibers used are steel fibers, synthetic fibers, glass fibers, natural fibers, asbestos fibers and carbon fibers. The effects of steel fibre type and dosage, matrix strength, coarse basalt. Prediction of hard projectile penetration on concrete targets hyeonjong hwang1, sanghee kim2, and thomas kang3. In all cases, the fiber is considered another admixture and should be submitted with the concrete mix submittal for approval. The reinforced concrete element resistance to the impact is expressed by its concrete compressive strength. Glass fibre reinforced concrete use in construction. Improvement on impact resistance of reinforced concrete. Evaluation on the impact resistant performance of fiber reinforced concrete by highvelocity projectile and contacted explosion article pdf available february 20 with 128 reads how we.
The swedish concrete association published a report on steel fibre reinforced concrete in 1995. Nov 16, 20 how to build a wall and pour in place concrete caps for wall duration. Pdf investigation of highvelocity projectile penetrating. Experimental investigation of fiber reinforced concrete beams. This provides a ultra strong and somewhat flexible concrete that also protects the concrete from environmental damage over the years. Fiber reinforced concrete has small distinct fibers that are homogeneously dispersed and oriented haphazardly. Kamal 16 determined that one steel layer and three steel layers of. It contains short discrete fibers that are uniformly distributed and randomly oriented. A fiber mix generallyrequires more vibration to consolidate the mix. Pdf the aim of this work is to describe the resistance of ultra high performance. Pdf residual velocity of the nondeformable projectile after.
Sharma there is an iucrea ing interest in the use of teel fibers to improve th properties of oncretc. Penetration into concrete targets by a hard projectile. The largest application for steel fiber reinforced concrete is floor slab construction, although it. Fiber reinforced concrete frc is a new structural material which is gaining increasing importance. Fibrereinforced polymer frp reinforcement has been used in construction as either internal or external reinforcement for concrete structures in the past decade. The volume fraction of fibres examined were 0%, 1% and 2%. Because concrete cannot be prevented from cracking, the goal is to keep the cracks tightly closed.
Analysis of fiber reinforced concrete beams under combined. Current research and applications of fiber reinforced concrete composites in india v. Effects of fibers, aggregate, curing temperature, compressive and flexural tensile strength of concrete on. Request pdf response of hybrid fiber reinforced concrete slabs to hard projectile impact in the present study, the effectiveness of hybrid fibers a combination of steel and plastic fibers in. This transverse movement of the fiber initiates the transverse wave. Reinforced concrete slabs submected to deformable promectile. Pvaecc is a ductile material that can achieve extremely high flexural strength and tensile. Gfrc can be formed into ornate shapes, and its light weight provides many benefits for high rise buildings. Current research and applications of fiber reinforced. Kevin folliard, david sutfin, ryan turner, and david p. Concrete, industrial wastes, hypo sludge, recron 3s fibers, secondary reinforcement, fiber reinforced concrete, conventional concrete cite this article. Fibers include steel fibers, glass fibers, synthetic fibers and natural fibers each of which lend varying properties to the concrete. This masters thesis was carried out, between january 2011 and june 2011, at the. 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.
For this purpose, it is necessary to design structures that. In addition, the character of fiberreinforced concrete. Fiberreinforced concrete enhances the durability of concrete by reducing crack width typically due to plastic shrinkage, long term drying shrinkage and thermal changes. Prediction of hard projectile penetration on concrete targets. Common design of reinforced concrete elements to resist hard projectile impact is carried out by calculating their proper thickness utilizing existing formulas. As it propagates away from the point of impact, the material behind the wave front flows toward the impact point, which is deflecting in the direction of motion of the moving projectile. The types of fibres chosen were polyolefin, polyvinyl alcohol and steel. Fiber reinforced concrete frc is finding increased use in construction. Frc offers several advantages over rebar or wire mesh reinforced concrete including increased crack resistance, ductility, energy absorption, impact resistance and residual strength. Further information on the use of fibres may be found in concrete society technical report 63, guidance for the design of steelfibre reinforced concrete and technical report 65, guidance on the use of macrosyntheticfibre reinforced concrete. Naturally occurring asbestos fibers and vegetable fibers, such as sisal and jute, are also used for reinforcement. To predict the penetration depth of concrete targets, petry et al.
Fiberreinforced concrete and bridge deck cracking a thesis submitted to the graduate faculty in partial fulfillment of the requirements for the degree of master of science by daniel stephen myers norman, oklahoma 2006. Design of fibre reinforced concrete beams and slabs. 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. Naturally occurring asbestos fibers and vegetable fibers, such as sisal and jute, are also used for. Preparing a two column paper with ms word for windows civil. The target supporting frame is fixed on the ground to avoid any variation or movement.
Division of structural engineering, concrete structures. Gfrc panels consist of a 1 thick solid concrete skin. Fibers suitable for reinforcing concrete have been produced from steel, glass, and organic polymers synthetic fibers. The matrix strength class greatly influences the antipenetration performance of concrete under the highvelocity projectile impact. Balasubramanian cement and concrete matrices reinforced with randomly oriented short fibers are finding increasing applications in both precast and in situ concrete construction. In the first study, perforation experiments on rsc and hsc for varied impact velocities are carried out, and the exit velocity is compared with the available experimental data.
Fiber reinforced polymer frp design example simpson. Steel fibres reinforced concrete against impact forces, thereby improving the toughness characteristics of hardened concrete. Gfrc glass fiber reinforced concrete projects by willis. Glass fiber concretes are mainly used in exterior building facade panels and as architectural precast concrete. One of the most important initial checks for an engineer of record is to confirm continue reading fiber reinforced polymer. Resistance of ultra high performance fibre reinforced concrete to. Evaluation of a polyvinyl alcohol fiber reinforced. Fiberreinforced concrete is concrete containing fibrous material which increases its structural integrity.
The 12th international symposium on fiber reinforced polymers for reinforced concrete structures frprcs12. Properties and applications offiber reinforced concrete. Experimental results of fiber reinforced concretes subjected to high velocity projectile impacts by anderson et al. Trais center for transportation research the university of texas at austin. Frc can also significantly lower materials and labor costs compared to rebar or wire mesh reinforced concrete. The effects of reinforcement arrangement 8,1516 17, fiber properties and volume fraction 6,8,10,121418 and aggregate size 7,18,19 on the antiimpact performance of concrete were. Publishers pdf, also known as version of record includes final page, issue and. Fiber reinforced concrete frc is concrete made primarily of hydraulic cements, aggregates, and discrete reinforcing fibers. Hybridfiber reinforced concrete slabs to hard projectile impact, internal journal of impact engineering, 58, 1730. Properties and applications offiber reinforced concrete faisal fouad wafa associate professor, civil engineering department, faculty ofengineering, king abdulaziz university, jeddah, saudi arabia.
Thus unlike plain concrete, a fiberreinforced concrete specimen does not break immediately after initiation of the first crack. The applicability of the following tests to fiber reinforced concrete. Hookedend steel fibers having an aspect ratio of 60 with volume fractions of 1% and 2% were studied. Behavior of fiberreinforced concrete slabs under low velocity projectile impact authors. The following frp design example walks the reader through the typical process for designing an frp strengthening solution for a concrete tbeam per aci 440. Fiber reinforced aerated lightweight concrete falc was developed to reduce concretes density and to improve its fire resistance, thermal conductivity, and energy absorption. Behavior of fiberreinforced concrete slabs under low. Modeling of the sustainable uhpfrc under projectile impact. This material is very good in making shapes on the front of any building and it is less dense than steel. Concrete with steel reinforcement grids, also called ferrocement, is often used with plain concrete panels and eccs. Fiber reinforcing has no impact on the air content of concrete compared to the same sample of non fiber concrete, but the impact on slump is significant. It is lightweight and durable and can be cast into many different shapes. Finally, the results of fiber reinforced concrete shall be compared with the conventional concrete.
This is the ratio of fibre length to fibre diameter or equivalent diameter for nonround fibres. Astm c1609 flexural testing of fiberreinforced concrete. Fiber reinforced concrete are of different types and properties with many advantages. Parametric study on local impact damage of concrete members. Fiberreinforced concrete frc examination of fractured specimens of fiberreinforced concrete shows that failure takes place primarily due to fiber pullout or debonding. Because concrete cannot be prevented from cracking, the goal is to keep the cracks tightly closed in order to maintain longterm durability.
Shear strength of fiber reinforced concrete beams was studied in this research project. For example, it has been shown that the flexural energy absorption of fiberreinforced concrete frc beam specimens increases significantly with the strain rate see fig. Fiberreinforced concrete enhances the durability of concrete by reducing crack widths typically due to plastic shrinkage, long term drying shrinkage and thermal changes. The tensile strength of concrete is very low because plain concrete normally. The motion of the rigid projectile is controlled by the penetration resistance. Fiber in continuously reinforced concrete pavements 6. Typical aspect ratios range from about 20 to 100, while.
Projectile penetration of reinforced concrete blocks. May 12, 20 fiber reinforced concrete frc is concrete containing fibrous material which increases its structural integrity. Response of hybridfiber reinforced concrete slabs to hard. Pdf evaluation on the impact resistant performance of. Mechanical properties of fiber reinforced lightweight.
An experimental investigation on the behaviour of steel fibre reinforced ternary blended concrete subjected to sustained elevated temperature. Steel fiber reinforced concrete panels subjected to impact. Steel fiber, concrete, properties, crack, ductility, technology. Fiber reinforced concrete enhances the durability of concrete by reducing crack widths typically due to plastic shrinkage, long term drying shrinkage and thermal changes. Almusallam 21 investigated the response of hybridfiber. The use of fiber generally will decrease the same sample by 2 inches. 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.
Introduction to steel fiber reinforced concrete on. For this purpose, it is necessary to design structures that could reduce or isolate the propagation of stress waves. Fiberreinforced concrete frc is concrete made primarily of hydraulic cements, aggregates, and discrete reinforcing fibers. 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. Aramids or their betterknown commercial variants kevlar, twaron, and technora, are known to form the basis of. Fiber reinforced concrete is a type of concrete that includes fibrous substances that increase its structural strength and cohesion. Normal unreinforced concrete is brittle with a low to not exist. Experimental investigation of ultrahigh performance fiber.
Almansa and canovas concluded that adding steel fiber to concrete reduces. External vib ration is preferable to prevent fiber segregation. It contains short discrete fibers that are uniformly. The main variables of the study were type of fibre and volume fraction of fibres. Thought its study is not yet completed steel fibers are widely used as a fiber reinforced concrete all over the world as it ensures less cracking than normal concrete. Publishers pdf, also known as version of record includes final page, issue and volume numbers. Indeed, some fibers actually reduce the compressive strength of concrete. Diana finite element analysis, users manual release 9. In spite of their popularity in concrete penetration design, empirical formulae have. Sep 18, 2015 fiberglass reinforced concrete gfrc, is a concrete mixture that has high strength fiber glass in the mix. Glass fiber reinforced concrete is made of a 1 thick cementitious skin, reinforced with alkali resistant glass fibers, and attached to a metal stud frame system. Projectile impact velocity versus helium pressure in the reservoir 44.
Analysis of fiber reinforced concrete beams under combined loadings a. Fiberglass reinforced concrete gfrc, is a concrete mixture that has high strength fiber glass in the mix. Fiber reinforced concrete for reduced crack widths. Thus unlike plain concrete, a fiber reinforced concrete specimen does not break immediately after initiation of the first crack. The second study focuses on ecc, where multiple impact of steel and plastic fiber reinforced concrete panels are explored. Although the field of textile reinforced concrete is not as mature as.
Glass fiber reinforced concrete gfrc or grc is a type of fiber reinforced concrete. Download the seminar report for fibre reinforced concrete. Fiberreinforced concrete is generally made with a high cement content and low watercement ratio 9. Now, why would we wish to add such fibres to concrete. Steel or macro synthetic fibres may be added to the concrete either at the readymixed plant or to the mixer truck on site. They found that incorporation of steel fibers in the concrete could reduce crater diameter and crack propagation.
Evaluation of a polyvinyl alcohol fiber reinforced engineered. Ultrahigh performance fiber reinforced concrete uhpfrc is currently one of the. Pdf resistance of ultra high performance fibre reinforced concrete. Continuous meshes, woven fabrics and long wires or rods are not considered. Influence of key design parameters of ultrahigh performance fibre. To investigate the failure characteristics of the reinforced concrete slab, impact motion of the projectile, reaction force, and straintime history on the back surface and reinforcing bars of. How to build a wall and pour in place concrete caps for wall duration. The study on the introduction of effect of steel fibers is not still promising as steel fiber reinforced concrete has to be used for sustainable and longlasting concrete structures. Franzen department of civil and environmental engineering. Design of fibre reinforced concrete beams and slabs master of science thesis in the masters programme structural engineering and building performance design ammar abid, kenneth b. Historical perspective effect of fibers in concrete benefits. Resistance of highstrength concrete to projectile impact. This research was done to evaluate a polyvinyl alcohol fiber reinforced engineered cementitious composite pvaecc and assess the prospects to utilize the material in the bonded pavement overlay. To prevent movement of the specimen during impact, two.
The matrix strength class greatly influences the anti penetration performance of concrete under the highvelocity projectile impact. Resistance of fibre concrete slabs to low velocity projectile. Oct 25, 2015 fiber reinforced concrete is concrete containing fibrous material which increases its structural integrity. Development of sustainable protective ultrahigh performance fibre. Fiber reinforced concrete frc examination of fractured specimens of fiber reinforced concrete shows that failure takes place primarily due to fiber pullout or debonding. Both conventionally reinforced and fiber reinforced concrete slabs were considered.