Fracture behavior and properties of functionally graded fiberreinforced concrete jeffery roesler, amanda bordelon, cristian gaedicke, kyoungsoo park, and glaucio paulino department of civil engineering university of illinois at urbanachampaign, 205 n. In order to improve the durability of fiber reinforced concrete, the two following paths could be used. Fibers also help minimize the development of plastic shrinkage cracks that have a tendency to form during adverse weather such as hot, dry, and windy conditions. Take steel fiber for example, theoretically, both the bending strength and the tensile strength will rise with the increase of fiber content ratio. Methodology the methodology of the work consist of 1identifying the specification of material to be selected. This masters thesis was carried out, between january 2011 and june 2011, at the. He is a member of aci committees 363, highstrength concrete. Mechanical properties of concrete and mortar reinforced with randomly distributed smooth steel fibers were investigated to understand the mechanism of fiber reinforcing.
Fip 8 design and specification of fiberreinforced concrete. Addition of fiber reinforcement in discrete form improves many. The interest in the use of fibers for the reinforcement of composites has increased during the last several years. This paper investigated the mechanical properties of highstrength steel fiber reinforced concrete. A number in parentheses indicates the year of last reapproval. In recent years fibers has been widely utilized for strengthening of concrete structures due to its high tensile and flexural properties. This document is a companion report to overview of fiber reinforced concrete bridge decks, which summarizes the experience from existing bridge deck and bridge deck overlay construction projects that have employed frc materials. In fresh concrete, fibers help reduce bleeding, settlement and the cracking associated with settlement. External vib ration is preferable to prevent fiber segregation. Highperformance fiberreinforced cementitious composites hpfrccs are a group of fiber reinforced cementbased composites which possess the unique ability to flex and selfstrengthen before fracturing. It contains short discrete fibers that are uniformly distributed and randomly oriented. A fiber mix generallyrequires more vibration to consolidate the mix. Pdf mechanical properties of hybrid fiber reinforced.
Glass fiber reinforced concrete consists of highstrength, alkaliresistant glass fiber embedded in a concrete matrix. Fiber reinforced concrete has so far been successfully used in slabs on grade, architectural panels, precast products, offshore structures, structures in seismic regions, thin and thick repairs, crash barriers, footings, hydraulic structures and many other applications. The compressive strength, permeability and electric. Report date april 2001 the flexural capacity of reinforced concrete beams 6. 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. Astm c1609 flexural testing of fiberreinforced concrete. Frc can also significantly lower materials and labor costs compared to rebar or wire mesh reinforced concrete. Table 1 properties of composite reinforcing fibers. In addition, the character of fiberreinforced concrete. Use of carbon fiber reinforced polymer composites to. This paper presents the results from an experimental program and an analytical assessment of the in. Some studies have shown that fibers can reduce crack widths within a concrete sample, which is an integral part in the deterioration of concrete because cracks allow corrosive materials to reach the rebar. Steel fiber reinforced concrete provides superior resistance to cracking and crack propagation due to increased tensile strength in concrete structures.
An investigation on strength properties of glass fiber. Introduction fibre reinforced concrete frc may be defined as a composite materials made with portland cement, aggregate, and incorporating discrete discontinuous fibres. Pdf currently in concrete technology a lot of materials were introduced to improve the quality and properties of concrete. However they were corroded by the highly alkaline portland cement matrix. The capacity of natural fibers to absorb water is another path to decreasing the durability of fiber reinforced concrete. Pdf properties of steel fiber reinforcement concrete with. Objective of the work the objective is to study the effect of polypropylene fiber in concrete. Several useful documents on fiber reinforced concrete frc have been developed by aci committee 544, fiber reinforced concrete, including a design guide, aci 544. Pdf this research paper investigates the physical, chemical and mechanical properties of steel slag aggregates ssa, gravel aggregates. Applications of steel fiber reinforced concrete it is known that plain cement concrete does not have good tensile properties to. Fiberreinforced concrete frc is concrete made primarily of hydraulic cements, aggregates, and discrete reinforcing fibers. The reinforcement is usually, though not necessarily, steel reinforcing bars and is usually embedded passively in the concrete before the. Glass fiber reinforced concrete gfrc comprises hydration products of cement, or cement plus sand, and the glass fibers.
Study on polymer modified steel fiber reinforced concrete. This page contains fiberreinforced concrete frc seminar and ppt with pdf report. The results show that the addition of steel fibers reduces the rheological properties of the concrete by 40%55% compared to the control mix mc1, although all the mixtures mc1mx4 justified. A combination of high strength, stiffness and thermal resistance favorably characterizes the fiibers.
Fibers enhance both the fresh and hardened properties of concrete. Highperformance fiberreinforced cementitious composites. Pdf an experimental study on mechanical properties of. The mechanical characteristics such as compressive strength, flexural strength and split tensile strength of polymer concrete with fibers were investigated. Properties and applications of fiber reinforced concrete. Fiber reinforced concrete has small distinct fibers that are homogeneously dispersed and oriented haphazardly. Its properties would obviously, depends upon the efficient transfer of stress between matrix and the fibers. Pdf applications and properties of fibre reinforced concrete. When the fibre reinforcement is in the form of short discrete fibres, they act effectively as rigid inclusions in the concrete matrix. Pdf fiber reinforced concrete properties a multiscale.
In this paper, an introduction is given on the properties of different fibers used for structural applications. Fiber reinforced concrete properties a multiscale approach article pdf available in computers and concrete 85 october 2011 with 914 reads how we measure reads. Steel fiber, concrete, properties, crack, ductility, technology. Exploring the properties of fiber reinforced concrete. Fibers used are steel fibers, synthetic fibers, glass fibers, natural fibers, asbestos fibers and carbon fibers. Sumit thakur civil fiberreinforced concrete frc seminar and ppt with pdf report. Fibre reinforced concrete frc is cementing concrete reinforced mixture with. The effects of polypropylene fibers on the properties of reinforced. Factor taking bond properties of ordinary reinforcement into account. Glass fibre reinforced concrete gfrc is a material that is making a significant contribution to the economics, technology a nd aesthetics of the construction industry worldwide for over 40 years. The improvement that the steel fibers bring out in the concrete in its hardened state depends largely on the amount and type of steel fibers added to the concrete as well as the properties of the. Founded in 1904 and headquartered in farmington hills, michigan, usa, the american concrete institute is a leading authority and resource worldwide for the development, dissemination, and adoption of its consensusbased standards, technical resources, educational programs, and proven expertise for individuals and organizations involved in concrete.
In this form, both fibers and matrix retain their physical and chemical identities, while offering a synergistic combination of properties that cannot be achieved with either of. Measurement of properties of fiber reinforced concrete. Fiber reinforced concrete is the composite material containing fibers in the cement matrix in an orderly manner or randomly distributed manner. In fiber reinforced concrete, fibers mixing amount, aspect ratio, distribution and alkali resistance greatly influence its properties. Thus unlike plain concrete, a fiberreinforced concrete specimen does not break immediately after initiation of the first crack. Increasingly, fibers are being used to replace temperature and shrinkage reinforcement in concrete and, in some applications, prim ary reinforcement. Models derived based on the regression analysis of 60 test data for various mechanical. Fiber reinforced concrete has so far been successfully used in slabs on grade. Glass fiber reinforced concrete gfrc properties and. To conduct a comparative study on fiber in concrete and conventional concrete. What are applications of steel fiber reinforced concrete. Mechanical properties of steel fiberreinforced concrete. In this study, the application of high performance polymer fibers hpp fibers, called barchip, that are a kind of polypropylene fiber in concrete lining of water pressure tunnels, was investigated experimentally. The swedish concrete association published a report on steel fibre reinforced concrete in 1995.
Design of fibre reinforced concrete beams and slabs. Frc offers several advantages over rebar or wire mesh reinforced concrete including increased crack resistance, ductility, energy absorption, impact resistance and residual strength. Fibers suitable for reinforcing concrete have been produced from steel, glass, and organic polymers synthetic fibers. Mechanical properties of ultrahigh performance fiber. Fiberreinforced concrete seminar ppt with pdf report. A comprehensive investigation into the mechanical properties of ultrahighperformance fiberreinforced concrete uhpfrc, considering various influential factors, is imperative in order to obtain fundamental information for its practical utilization. Fibbers were compared with conventional reinforcementin flexure, tesion and compression. Fracture behavior and properties of functionally graded.
Fiber reinforced concrete frc is finding increased use in construction. Fiberreinforced concrete frc examination of fractured specimens of fiberreinforced concrete shows that failure takes place primarily due to fiber pullout or debonding. Glass fibers are used are used as reinforcement for concrete. Reinforced concrete rc also called reinforced cement concrete or rcc is a composite material in which concrete s relatively low tensile strength and ductility are counteracted by the inclusion of reinforcement having higher tensile strength or ductility. Fiber reinforced concrete frc is a new structural material which is gaining increasing importance. In this study, the results of polypropylene fibers reinforced concrete properties have been presented. In this paper, effect of using glass fibers on strength properties of concrete has. Glass fibers were first used to reinforce cement and concrete in russia.
Few applications of sfrc are in the field of irrigation structures. Different volumes, lengths, orintations and types of fibers were used. Properties and applications offiber reinforced concrete. In this paper, the mechanic properties, technologies, and applications of sfrc are discussed. Fiber reinforced concrete is a type of concrete that includes fibrous substances that increase its structural strength and cohesion. It holds short discrete fibers that are uniformly distributed and circumstances oriented. The properties included compressive and splitting tensile strengths, modulus of rupture, and toughness index. Mohamed, mahmoud khater, sayed ahmed department of structural engineering, faculty of engineering, zagazig university, zagazig, egypt which use the interaction of abstract using of ultrahighperformance fiber reinforced concrete uhpfrc in structural applications has significantly. Pdf properties of fibre reinforced concrete made with discarded. Furthermore, it has to be remarked that the use of high fiber contents for resisting high stresses may cause a loss of workability and compactness of frc leading to a possible reduction of the material tensile properties. Mechanical properties of fiberreinforced concrete using. Gfrc is composed of fine sand, cement, water, admixtures if required and alkaliresistant ar glass fibers in different ratios. Water absorption leads to volume changes that can induce concrete cracks ghavami, 2005, agopyan et al. The usefulness of fiber reinforced concrete frc in various civil engineering applications is indisputable.
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. Fiberreinforced concrete frc is concrete containing fibrous material which increases its structural integrity. Naturally occurring asbestos fibers and vegetable fibers, such as sisal and jute, are also used for reinforcement. This paper emphasizes on polymer modified steel fiber reinforced concrete, a recent advancement in the field of reinforced concrete. Earlyage fiberreinforced concrete properties for overlays ugpti. Fiber reinforced concrete overview for concrete pavement.
The aim of this study creating a selfcompacting concrete increasing coarse aggregate content and increasing the mechanical properties like tensile, flexural, and compressive strength. Founded in 1904 and headquartered in farmington hills, michigan, usa, the american concrete institute is a leading authority and resource worldwide for the development, dissemination, and adoption of its consensusbased standards, technical resources, educational programs, and proven expertise for individuals and organizations involved in concrete design. Mechanical properties of ultrahighperformance fiber. Pdf past investigations on mechanical and durability. Mechanical properties of steel fiberreinforced concrete job thomas1 and ananth ramaswamy2 abstract. Fiber reinforced concrete types, properties and advantages. 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. This study aims to investigate the agedependent changes in flexural and fracture properties of fiber reinforced concrete frc used in the design of thin overlay. 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 brittle manner.
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