Fiber reinforced concrete types, properties and advantages. Level 1 deflection softening or crack controlling with little enhancement in mechanical properties, level 2 deflection hardening, level 3 tensile. Under normal circumstances, reinforced concrete structures rcs show excellent performance in terms of durability and structural behaviour except for the. Mechanical properties of ultrahigh performance fiber. It should be mentioned that the appropriate use of strainhardening frc composites in conventional reinforced and prestressed concrete structures, or part of them, would indeed. Highperformance fiberreinforced cementitious composites. Properties and applications offiber reinforced concrete.
High performance glass fiber reinforced concrete cladding. Ultrahighperformance fiberreinforced concrete uhpfrc was first developed in mid1990s. Introduction fibre reinforced concrete frc may be defined as a composite materials made with portland cement, aggregate, and incorporating discrete discontinuous fibres. Tensile stress deformation behavior of normal concrete nc, fiberreinforced concrete frc, and highperformance fiberreinforced concrete hpfrc 11. Fiber reinforced concrete are of different types and properties with many advantages. Principal research scientist in cooperation with the u.
Hence, high performance fiber reinforced concrete composites is a type of frc composites, which is distinguished by the strain hardening phenomenon in tension after the first crack. Free shrinkage of high performance steel fiber reinforced. In general, the addition of fibers in highperformance concrete has been proven to improve the mechanical properties of concrete, particularly the ts, flexural. In order to study the influence of the ultrahigh performance fiber reinforced concrete uhpfrc beams on impact performances. At this moment studies are carried out with the aim to come to an international recommendation for. Properties of strain hardening ultra high performance. Continuous meshes, woven fabrics and long wires or rods are not considered.
The stirrups have slight effect on the ultimate shear strength of uhpfrc beams. He is a member of aci committees 363, high strength 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. Now, why would we wish to add such fibres to concrete. The application of uhpfrc for the earthquake 22 strengthening of existing structures could considerably improve the performance of existing 23. The study has revealed that high early strength durable concretes can be achieved with proper. Ultra high performance fiber reinforced concrete uhpfrc was first developed in mid1990s. Recently, a new ultra high performance fiber reinforced concrete uhpc was introduced into construction. Fiberreinforced concrete frc is concrete containing fibrous material which increases its structural integrity. The infill panel material is a selfconsolidating concrete mixture that uses high strength steel fibers.
Fiber reinforced concrete overview for concrete pavement and overlays general overview of fibers used for concrete pavements with an emphasis on macro fibers and their effect on concrete properties and pavement construction. Sumit thakur civil fiberreinforced concrete frc seminar and ppt with pdf report. He is a member of aci committees 363, highstrength concrete. In general, when fibres are added to concrete, tensile strain in the neighbourhood of fibres improves significantly. The name high performance fiber reinforced cement composites comes from the excellent performance under tensile loading condit ions.
High performance fiber reinforced cement composites hpfrcc represent a. High performance fiber reinforced concrete is developing quickly to a modern structural material with a high potential. Investigation of properties of highperformance fiber reinforced. Cyclic response of precast highperformance fiberreinforced. Utilization of ultrahigh performance fibre concrete sciencedirect. Introduction medium and highrise structures in regions of high seismicity typically rely on structural walls for lateral stiffness and strength. The fibers in uhpc provide tensile capacity across cracks, resulting in high shear capacity in bending members. The seismic behavior of coupling beams and walls constructed with tensile strainhardening, highperformance fiberreinforced concrete hpfrc was studied through tests of largescale precast coupling beams and coupled walls. Ultrahighperformance fiberreinforced concrete topic.
It is a concrete mixture, which holds high durability and high strength when compared to conventional concrete. Civil afgc document ultra high performance fiber reinforced concretesinterim recommendations indicates that uhpc tends to have the following properties. Fibers include steel fibers, glass fibers, synthetic fibers and natural fibers each of which lend varying properties to the concrete. The effect of fiber on the high performance fiber reinforced concrete presented by 32 showed that the addition of steel fibers in high performance concrete hpc improves the mechanical. Prediction of explosive spalling of heated steel fiber. Impact analysis was conducted on varying percentage of fiber in concrete beams having 35mpa and 140mpa compressive. The recommendations of afgc and kci are conservative more than the codes. The materials used in hpfrc depend on the desired characteristics and the. This page contains high performance concrete seminar and ppt with pdf report. Properties of strain hardening ultra high performance fiber. Minimum shear reinforcement for ultrahigh performance. Particular applications of high performance fiber reinforced cement composites include bridge decks and special structures such as offshore platforms, spacecraft launching platforms, super highrise structures, blast resistant structures, bank vaults, and other highend structures. High performance concrete seminar and ppt with pdf report.
It holds short discrete fibers that are uniformly distributed and circumstances oriented. High performance fiber reinforced cementitious composites hpfrccs are a group of fiber reinforced cementbased composites which possess the unique ability to flex and selfstrengthen before fracturing. The maximum spacing between stirrups of ec2 and ecp2032017 is applicable. Recent studies performed on a high performance fiber reinforced concrete in a bridge deck found that adding fibers provided residual strength and controlled cracking. Very early strength, toughness, permeability, and fiber distribution evelina khakimova, eit graduate research assistant celik ozyildirim, ph. Ultrahigh performance fiber reinforced concrete uhp frc can be categorized according to the performance classification scheme proposed by naaman and reinhardt, which places cementitious composites into the following categories of behavior. Recently, a new ultrahighperformance fiberreinforced concrete uhpc was introduced into construction. The usage of ultrahigh strength concrete with high compressive and flexural strength has been significantly increasing in modern day construction. High performance concrete seminar ppt with pdf report. The effect of fiber on the highperformance fiberreinforced concrete presented by 32 showed that the addition of steel fibers in highperformance concrete hpc improves the mechanical. This paper presents the results of experimental and theoretical studies undertaken to assess the flexural performance of high. It contains short discrete fibers that are uniformly distributed and randomly oriented.
Recommendations for design and construction of high. Download fiber reinforced concrete pdf ppt seminar report. At this moment studies are carried out with the aim to come to an international recommendation for the design of structures with hpfrc. Small brass coated steel fibers, with a diameter of 0. The paper deals with the results of an experimental investigation into the free shrinkage of high performance steel fiber reinforced concrete hpsfrc. 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. Fiber reinforced concrete overview for concrete pavement and. Ultrahigh performance fiber reinforced concrete is a relatively new construction material having minimum coarse aggregate usually size greater than 67 mm is not used having discrete random steel fibers uniformly distributed across the concrete matrix with the basic strength of above 14,000 psi 100 mpa in 3 or 4 days that can go upto as high as 25,000 psi at. High performance fiber reinforced concrete hpfrc by kim et al. In recent years, an emerging technology termed, highperformance fiber reinforced concrete hpfrc has become popular in the. Slender structures usually in precast plants fire resistant structures. Fiber reinforced cement frc composites and high performance frc.
Department of transportation federal highway administration. Development of ultra high performance fiber reinforced. The use of locally available materials for producing ultra high performance fiber reinforced concrete uhpfrc can significantly reduce the cost gap that is. Steel fibers, which are the most widely used fibers in frc, typically provide a bridging effect along the crack interface which allows the ductile behavior of frc after cracking. Predicting the flexural behavior of ultrahighperformance. Detailing and behavior of coupling beams with high. As for instance testified by the recent symposium on hpfrc in kassel, germany april 2008 the number of structural applications increases. Compared to traditional concrete, highperformance concrete hpc has better workability, mechanical properties and durability 6, 7. Particular applications of high performance fiber reinforced cement composites include bridge decks and special structures such as offshore platforms, spacecraft launching platforms, super high rise structures, blast resistant structures, bank vaults, and other high end structures. The application of uhpfrc for the earthquake 22 strengthening of existing structures could considerably improve the performance of existing 23 structures due to its superior. Pdf in this study, the flexural behavior of ultra high performance fiber reinforced concrete uhpfrc is examined as a function of fiber length and. Jul, 2017 ultra high performance fiber reinforced concrete is a relatively new construction material having minimum coarse aggregate usually size greater than 67 mm is not used having discrete random steel fibers uniformly distributed across the concrete matrix with the basic strength of above 14,000 psi 100 mpa in 3 or 4 days that can go upto as high as 25,000 psi at 28 days ultimate cure. A precast coupling beam design was developed to speed up construction and minimize interference with wall. The infill panel material is a selfconsolidating concrete mixture that uses highstrength steel fibers.
Highperformance fiberreinforced cementitious composites hpfrccs are a group of fiberreinforced cementbased composites which possess the unique ability to flex and selfstrengthen before fracturing. Investigation of properties of highperformance fiber. Pdf high performance fiber reinforced concrete for pavements. Level 1 deflection softening or crack controlling with little enhancement in mechanical properties, level 2 deflection. Ultra high strength fiber reinforced concrete using aramid fiber. Steel fiber, concrete, properties, crack, ductility, technology. Steel fiber reinforced concrete nguyen van chanh 1. Architectural uhpc precast products are fiber reinforced.
Tensile stress deformation behavior of normal concrete nc, fiber reinforced concrete frc, and high performance fiber reinforced concrete hpfrc 11. Residual strength is directly proportional to the fiber content. Uhpc is a range of formulations which may be used for many different architectural and structural applications. Evaluation of ultrahighperformance fiberreinforced concrete. Properties and applications offiber reinforced concrete 51 high aspect ratio were found to have improved effectiveness. Uhpc, ultra high performance concrete, fiber reinforced, durability, material characterization, tensile behavior, compressive behavior 18. Both ann models showed excellent prediction accuracy and can serve as a tool for assessing thermal explosive spalling risk of steel fiber reinforced concrete. This particular class of concrete was developed with the goal of solving the structural problems inherent with todays typical concrete, such as its tendency to fail in a. This was designated as set 4 and included both tensile and flexural test results. 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. Pdf minimum shear reinforcement for ultrahigh performance. In this project, four different highperformance fiberreinforced systems were tested for properties that relate to their ability to produce tight cracks in flexure and bond to typical bridge deck concrete.
Material property characterization of ultrahigh performance. Get the latest journals, research papers, doc and pdf documents discussing the need of using various types of fibers like synthetic, steel, glass etc. What is ultra high performance steel fiber reinforced. This page contains fiberreinforced concrete frc seminar and ppt with pdf report. Pdf feasibility of reducing the fiber content in ultra. It is also known as strain hardening cementbased composites shcc due to the tensile strainhardening properties. Ultra high strength fiber reinforced concrete using aramid. Seismic behavior and detailing of highperformance fiber. The seismic behavior of coupling beams and walls constructed with tensile strainhardening, high performance fiber reinforced concrete hpfrc was studied through tests of largescale precast coupling beams and coupled walls. As for instance testified by the recent symposium on hpfrc in kassel. In recent years, an emerging technology termed, high performance fiber reinforced concrete hpfrc has become popular in the construction industry. High performance fiber reinforced cement composites 6. Testing program proportions of eight different mixtures prepared and tested under threepoint.
The improved tensile strength is also due to the use of fibers. Introduction medium and high rise structures in regions of high seismicity typically rely on structural walls for lateral stiffness and strength. These systems include of high performance fiber reinforced concrete. Fiberreinforced concrete frc is concrete consisting fibrous material which increases its structural purity. Download fiber reinforced concrete pdf ppt seminar. Download the seminar report on fiber reinforced concrete for civil and construction project. Uhpc, ultrahigh performance concrete, fiberreinforced, durability, material characterization, tensile behavior, compressive behavior 18. Development of precast bridge slabs in highperformance fiberreinforced concrete and ultrahighperformance fiberreinforced concrete. In recent years, an emerging technology termed, highperformance fiberreinforced concrete hpfrc has become popular in the construction industry.
In this project, four different high performance fiber reinforced systems were tested for properties that relate to their ability to produce tight cracks in flexure and bond to typical bridge deck concrete. There were fewer and narrower cracks in the frc even though the frc had more shrinkage than the control. Pdf the addition of fibers has allowed concrete to take a role in the field of ductile materials. Ultra high performance is not covered but different fiber types and volume fractions are required for strain hardening frc. Tailormade steel fiber reinforced ultra high performance concrete single. Fiber reinforced concrete for pavement overlays jeffery roesler, ph. Fiberreinforced concrete seminar ppt with pdf report. It has attracted much attention from engineers due to its excellent strength compressive strength is higher than 150 mpa and tensile strength is equal to or higher than 8 mpa, ductility, and fatigue resistance, as well as a unique strainhardening response involving multiple microcracks. The development over time of the autogenous, total, and drying shrinkage of hpsfrc, with a steel fiber content of between 0. In recent years, an emerging technology termed, highperformance fiberreinforced concrete hpfrc has become popular in the construction ind the materials used in hpfrc depend on the desired characteristics and the availability of suitable local economic alternative materials. Introduction ultra high performance fibre concretes uhpfc are a class of cementitious composites made of a strong and compact powderbased matrix and of steel or synthetic fibres as a. Fiber reinforced concrete overview for concrete pavement.
Backcalculation of residual tensile strength of regular. In the retrofit, the panels infill existing steel momentframe bays, adding stiffness, strength, and. Pdf model of hooked steel fibers reinforced concrete under tension. Fiberreinforced concrete frc seminar and ppt with pdf report. This document is available to the public through the national technical information service, springfield, va 22161. This later undergoes multiple cracking at higher strain levels. These systems include of highperformance fiberreinforced concrete. High performance, fiber reinforced conc rete, special loadings and structural applications b. Fracture mechanics of concrete and concrete structures high performance, fiber reinforced conc rete, special loadings and structural applications b. Ultrahigh performance fiber reinforced concrete uhpfrc. Typically, additional reinforcement for shear is not required graybeal, 2006b. Itwas shown that for thesamelengthanddiameter,crimpedendfibers can achievethesamepropertiesas straight fibers using 40 percent less fiberss.
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