Key words gfrp, glass fiber reinforced polymer, frp dowel, jpcp, jointed plain concrete pavement, relative deflection, joint efficiency, dowel 18. Polymer and steel fiber reinforced concrete in pavements. Fiberreinforced concrete durability with out the rebar. Fiber reinforced concrete is one of the fastest growing segments in the concrete industry. Design and evaluation of jointed plain concrete pavement. Design of continuously reinforced concrete pavements using glass fiber reinforced polymer rebars na 7. A versatile mix, fiberreinforced concrete can be used for onground floors and pavements, as well as construction parts like beams and pillars without the increased cost of using rebar. Naturally occurring asbestos fibers and vegetable fibers, such as sisal and jute, are also used for reinforcement. Different researchers reported the results of the addition of a large variety of fibers to asphalt concrete as fiber reinforced asphalt concrete frac. For each type of concrete six sets of cubes, cylinders, and beams have. Introduction concrete is one of the most promising construction materials with regards to its strength, high serviceability, structural stability and relative low cost. This versatility is due to the wide range of fibers available in different shapes, dimensions, lengths, and compositions.
Isbn 9789535109389, pdf isbn 9789535162926, published 20123. T1 fiberreinforced concrete pavement design and material requirements. Fiber reinforced concrete has small distinct fibers that are homogeneously dispersed and oriented haphazardly. Frc is defined as composite material consisting of concrete reinforced with discrete randomly but uniformly dispersed short length fibers.
Steelreinforced concrete pavement crcp has been used since 1921 its time for a better way. Customdesigned shape together with advanced materials result in unique fiber capable of replacing traditional steel mesh or steel fibre reinforcement, as well as offering impressive concrete tensile strength. Fiberreinforced concrete frc is concrete made primarily of hydraulic cements, aggregates, and discrete reinforcing fibers. Mechanical properties of steel fiberreinforced concrete. Fiber reinforced concrete frc is a new structural material which is gaining increasing importance. You know you need fiber reinforced concrete in your design, but you may not know the best path to get your design questions answered. There are several factors that might decrease ultimate load capacity of concrete structures such as steel corrosion in an aggressive environment, design calculation errors, and poor mix design.
This paper emphasizes on polymer modified steel fiber reinforced concrete, a recent advancement in the field of reinforced concrete. Asphalt concrete ac, a mixture of bitumen and aggregates, is a sensitive material compared to other configurations used in civil engineering. Fiberreinforced concrete is recognized as a highperformance construction material because of its high toughness levels under compressive and tensile loads. Fiber reinforced concrete an overview sciencedirect topics. It is ideally suited for concrete applications that require protection from plastic and drying shrinkage, improved durability, increased service life and reduced construction costs. Cracking and debonding of thin fiber reinforced concrete. Field evaluation of steel fiber reinforced concrete overlay with various bonding mechanisms g. Our synthetic fiber products are manufactured in the usa and been evaluated using over 25 standard consensus tests. Properties and applications offiber reinforced concrete faisal fouad wafa associate professor, civil engineering department, faculty ofengineering, king abdulaziz university, jeddah, saudi arabia. Almost all the previous work on carbon fiber reinforced concrete was conducted in japan and it showed that the use of carbon fibers in the amount of 2 vol. Continuously reinforced concrete pavement crcp is a major form of highway pavement in texas due to its increase in ride quality, minimal maintenance, and extended service life.
Fibers used are steel fibers, synthetic fibers, glass fibers, natural fibers, asbestos fibers and carbon fibers. Fiber reinforced concrete and admixtures concrete materials. The swedish concrete association published a report on steel fibre reinforced concrete in 1995. Fiber reinforced concrete can be used for a variety of applications shown below. However, it has been claimed that among various modifiers for asphalt, fibers have gotten much attention for their improving effects. Comparison of performance of standard concrete and fibre. This report, design of continuously reinforced concrete pavements using glass fiber reinforced polymer rebars, investigates the effects on stress development in pavement and on critical design factors from substituting glass fiber reinforced polymer gfrp reinforcement for conventional steel reinforcement. Study on polymer modified steel fiber reinforced concrete. Mechanical properties of steel fiberreinforced concrete job thomas1 and ananth ramaswamy2 abstract. Fiber reinforced concrete overview for concrete pavement and overlays. Fiber reinforced concrete has so far been successfully used in slabs on grade. Fiberreinforced concrete frc the fiberreinforced concrete comprises of high amounts of super plasticizers, which act as the waterreducing agents, fibers and finesized particles in the cement content comprising to about two percent of the total volume.
In this paper, a cement concrete pavement, steel fiber reinforced concrete with than the experimental study, the analysis of steel fiber reinforced concrete pavement engineering, test results show that the steel fibers in the concrete evenly distributed, with cement mortarbetter integration, better crack resistance of concrete, and shrinkage of steel fiber reinforced concrete is much smaller. Applications of fiber reinforced concrete in pavements. It was found that the tensile interfacial energy increased with fiberreinforcement. Embeddable concrete strain gauges figure 60 were also installed to monitor strains in the pavement. What are the disadvantages of fiber reinforced concrete.
The usefulness of fiber reinforced concrete frc in various civil engineering applications is indisputable. Fiber reinforced polymer american concrete institute. 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. Frc pavements overview pavement problems pavement design fiber options ltrc research.
Therefore, it is widely used in highrise buildings, tunnels, bridges, and precast structures. Polypropylene fiber reinforced concrete mixtures had a tensile strength of 3. Fiberreinforced concrete frc has been applied to concrete pavements for years, but there has been slow acceptance of a standard design process and appropriate material specifications for frc. However, crcp may sometimes experience pavement distress that results in early failure, either due to underdesign or the use of poor construction materials. The properties of hardened sfrcc, such as flexural strength, are remarkably better than those of conventional rcc. Fiber reinforced concrete association frca is focused on furthering the development, knowledge, and market of fiber reinforced concrete.
Therefore scientists and engineers are constantly trying to improve the performance of asphalt pavements. Research on steel fiber reinforced concrete pavement for orthotropic steel deck as a countermeasure for fatigue jun murakoshi1, naoki yanadori2, and hironori ishii3 abstract this paper describes ongoing studies about application of steel fiber reinforced. Providing and laying 40 mm steel fiber reinforced cement concrete in pavement in panels having area not more than 1. He is a member of aci committees 363, highstrength concrete. Toughness of polymer modified steel fiber reinforced concrete. This paper presents the results from an experimental program and an analytical assessment of the in. Fibrecrete remains flexible yet strong enough to handle heavy traffic, replacing traditional cementitious repairs prone to failure due to their stiffness. Using fiber reinforcement in residential projects provides an economical way to take advantage of the best in concrete technology. Basically, fiber reinforcement is considered as a coin with.
Therefore, this study has been carried out to generate experimental data on standard concrete of grade m45 and fiber reinforced standard concrete exposed to elevated temperatures. N2 fiberreinforced concrete frc has been applied to concrete pavements for years, but there has been slow acceptance of a standard design process and appropriate material specifications for frc. Fiberreinforced concrete frc examination of fractured specimens of fiberreinforced concrete shows that failure takes place primarily due to fiber pullout or debonding. Models derived based on the regression analysis of 60 test data for various mechanical. Design of continuously reinforced concrete pavements using. Largescale concrete slab tests were performed to demonstrate the increase in load capacity that frc provides over plain concrete slabs. To achieve impressive gains in safety, functionality and economy mate. Fiber reinforced concrete is a type of concrete that includes fibrous substances that increase its structural strength and cohesion. 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. Fiberreinforced concrete pavement design and material.
Thus unlike plain concrete, a fiberreinforced concrete specimen does not break immediately after initiation of the first crack. The application of steel fiber reinforced concrete sfrc as composite matrix is potentially advantageous from the point of view of its capacity to bear much higher stresses. Use of nsm fiber reinforced polymer for strengthening of. The use of near surface mounted fiber reinforced polymer bars for strengthening of reinforced concrete beam.
Abstractconcrete being the most important and widely used material is called upon to possess very high strength and sufficient workability properties. You will see why concrete fails and learn a new way to prevent it. Jpcp with frp dowels also provided sufficient lte after 5 million cycles of fatigue tests under hs25 loading. 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. Although it is known that the use of alternative binder materials in concrete would. Toughness, steel fiber reinforced concrete, polymer modified steel fiber reinforced concrete 1. Fiber reinforced concrete pavements are more efficient than ordinary cement concrete pavement. Fiber reinforced polymers the technology applied for concrete repair. Field evaluation of steel fiber reinforced concrete. Fiber reinforced concrete overview for concrete pavement.
Fiberreinforced polymer frp materials are composite materials that typically consist of strong fibers embedded in a resin matrix. Modification of the asphalt binder is one approach taken to improve pavement performance. Fiberreinforced polymer concrete repair material hotapplied, fastcure flexible concrete repair formulated with polymer modified resins, fiberglass, mineral fillers, aggregates. 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. Synthetic fibers, steel fibers and engineered blends of both materials can be used to improve everything from slabs, driveways, and patios to swimming pools, sidewalks, and decks. This webinar will give a general overview of fibers used for concrete pavements with an emphasis on macrofibersand their effect on concrete properties and pavement construction. This study evaluates the effect of the amount of fibers in a concrete mix on the shear capacity of steel fiberreinforced concrete beams with mild steel tension reinforcement and without stirrups. Our team is committed to bringing you the best technical support in the industry. The fiber reinforced concrete associations project case studies showcase realworld examples of fiber reinforced concrete applications. Properties and applications offiber reinforced concrete. The matrix acts to bond and protect the fibers and to provide for transfer of stress from fiber to fiber through shear stresses.
Fiber reinforced concrete association project case. Fiber reinforced concrete is used to improve the performance of concrete cracking and shrinkage problems. Fiber reinforced polymers the technology applied for. We have had proven performance in over 125 million cubic yards of fiber reinforced concrete. Transportation officials and american concrete pavement association criteria. Building professionals anc concrete contracters are increasingly turning to the use of fibers in different shapes, sizes, and colors to reinforce concrete for many building applications.
This 1hour interactive online course gives you the information and the methods to improve the strength of concrete pavements using glass fiber reinforced polymer rebar. As soon as some tension is developed, it will lose its stiffness. The fibers provide strength and stiffness to the composite and generally carry most of the applied loads. Fibers suitable for reinforcing concrete have been produced from steel, glass, and organic polymers synthetic fibers. Fiber reinforced concrete association applications. Steel fiber reinforced concrete pavement maintenance.
1444 1515 478 775 590 945 913 963 1126 862 421 1244 1113 77 1498 1083 29 398 167 249 222 146 786 469 1191 118 710 893 278 946 118 1019 1248 1262