Polypropylene is one of the cheapest and abundantly available polymers. Concrete is the most used construction material of the construction sector. Increasingly, fibers are being used to replace temperature and shrinkage reinforcement in concrete and, in some applications, prim ary reinforcement. Introduction construction sector is consumer of natural resources.
The paper shows the experimental results of compressive strength, split tensile strength, flexural strength with the addition of 0. This research conducted a comprehensive test on the behavior of polypropylene fiber reinforced concrete. The strength and deformation characteristics of polypropylene fiber reinforced concrete pfrc beams were investigated by fourpoint bending procedures in. A total of 4 million tonnes of polypropylene fibers are produced in the world overall in a year. Influence of polypropylene fiber on strength of concrete. Application of high performance polypropylene fibers in. Fibers, percolation, and spalling of highperformance concrete.
An investigation on adding polypropylene fibers to. Macro synthetic fibres are made from polypropylene and do not corrode,eliminating the risk of spalling. These properties are improved with increase of fibers length. Tailoring composite properties with discrete fibers michael dopko. Theenathayalan, experimental study on mechanical properties of polypropylene fiber reinforced pervious concrete, international journal of civil engineering and technology, 102, 2019, pp. Properties and applications offiber reinforced concrete. The presence of fibers also results in a more homogeneous, isotropic, and ductile behavior of concrete 17.
Changes in compressive strength, tensile strength, flexural strength, toughness and energy absorption, water absorption of concrete and. External vib ration is preferable to prevent fiber segregation. Influence of the fiber volume content on the durability. The results manifest that adding polypropylene fibers increases the flexural strength slightly and decreases the cracks width. Polypropylene fibers are resistant to most chemical attacks. Mar 01, 2014 to examine the effect of high performance polypropylene hpp fibers on concrete characteristics, in this research, concrete mixtures with 0. Hybrid reinforcement of asphaltconcrete mixtures using. Polypropylene fiber concrete is versatile and can be used in most applications. Polypropylene fibers are being used extensively throughout the u. It has also been known that addition of fibers in concrete has little or.
Ac mixtures by using polypropylene and glass fibers. Polypropylene fibers are thermo plastics produced from propylene gas. Polypropylene fiber use of polypropylene fiber reduces the shrinkage and control cracks. The percentage increase in the compressive strength for the cubes with polypropylene fiber 1%, 1. Jp2005306676a polypropylene short fiber for concrete. Polypropylene fiber, recycled aggregate, water absorption, freezingthawing, impact strength. No minimum cover required and fibres are present throughout the depth of the concrete matrix. Polypropylene fibers the polypropylene fibers in three sizes of 6, 12 and 19 mm were used. The plain concrete slabs that are longer than one meter are failed at the shrinkage level of 180. The control group concrete was designed at 4,000 psi. Inclusion of synthetic polypropylene macro fibers in concrete is known to improve crack resistance and is a feasible solution for prolonging the life of crossties. The literature showed that, for the low fiber volumes 0. Thousands if individual fibers are then evenly dispersed throughout.
The concrete reinforcing fibers include metal, polymer, and various others. Pdf effect of polypropylene fiber on properties of concrete. The fiber dispersion into concrete is one of the technique to improve the building properties of concrete. Fiber reference concrete concrete length see end of strength strength inches article 680 700 2 2 680 725 2 2 530 555 2 4 815 800 2 4 865 870 3. When plastic shrinkage forces are applied to concrete in the presence of polypropylene fibers, the fibers resist early shrinkage cracking nd increase the stability of concrete at the initial and early set stages, causing the material to be less. Pdf using polypropylene fibers in concrete to achieve. Small addition of polypropylene fibers in concrete reduces the flow of water through the concrete matrix by preventing the transmission of water through the normal modes of ingress, e. The implications of these qualities in concrete with polypropylene fiber additions are that cement hydration will be improved, separation of aggregate will be reduced and the flow of water through concrete that causes deterioration from freeze thaw.
Behaviour of polypropylene fiber reinforced concrete under dynamic. The compressive strength, splitting tensile strength of. Concrete, compressive strength, bond strength, polypropylene fiber. Recently, however the development of polypropylene fiber reinforced concrete pfrc has provided a technical basis for improving these deficiencies. Polypropylene the synthetic fibers available in the united states, polypropylene is the most widely used in ready mixed concrete. Moreover, the water penetration and gas permeability of steel fiber reinforced concrete are increased compared to plain concrete. Concrete reinforced with polypropylene fibers concrete. Introduction concrete is the most used building material worldwide with its usage doubling the combined consumption of wood, steel, aluminum and plastics. The positive interactions between polypropylene fibers lead to the lowest drying shrinkage of fibrous concrete. Optimal polypropylene fiber content for improved compressive. The literature search yielded information from numerous laboratory studies of the material properties of polypropylene fiber reinforced concrete pfrc. Polypropylene fibers are added to concrete during batching. Abstract polypropylene fiber reinforced concrete is an embryonic construction material which can be described as a concrete having high mechanical strength, stiffness and durability.
In addition, the scaling resistance also is improved more for steel fiber reinforced concrete. Mechanical properties of polypropylene fibre reinforced concrete. Howe ve r, the plain con ry tests, more data are needed. It was found that the compressive strength of concrete increases by increasing the percentage of polypropylene fiber from 0 to 0. Mechanical improvement of concrete by irradiated polypropylene fibers article in polymer engineering and science october 2005 impact factor. The fibrillated pattern of sikafiber ppf optimizes the mechanical bond between the mortar matrix and fiber networks. According to tests by zollo 12 polypropylene fibers reducedshrinkage of plain concrete specimens by about 75 percent. The present study investigated the performance of synthetic polypropylene macro fiber reinforced concrete and their application in railway crossties.
The compressive strength, permeability and electric resistivity of concrete samples were studied. Design of concrete mixture for each series of mix fcu 35 mpa at 28 days. Its melting point is high about 165 degrees centigrade. In this experimental investigation, fiber of length 20mm is used. In a previous comparative study 29, different types of fibers including polypropylene, polyester, nylon and glass were used to reinforce asphalt concrete mixture. Polypropylene fibrereinforced concrete an overview. Pdf effects of polypropylene fibers on compressive and flexural. Thousands if individual fibers are then evenly dispersed throughout the concrete during the mixing process creating a matrixlike structure. Polypropylene fibers are characterized by low specific gravity and low cost. These are available in different aspect ratios and are cheap in cost.
Concrete is a backbone of infrastructural development industry. Polypropylene fibers can not provide the primary reinforcement in a concrete pavement because of relatively low modulus and strength values when compared with steel fibers. Using polypropylene fibers in concrete to achieve maximum strength. The plain concrete slabs behave in a brittle fashion as expected. Further, addition of fibers have reduced the drying shrinkage of concrete 4. The compressive strength, splitting tensile strength of concrete samples made with different fibers amounts varies from 0%,0. A combination of high strength, stiffness and thermal resistance favorably characterizes the fiibers. Nov 01, 2020 polypropylene fiber in concrete mix design is used for multiple purposes that includes rigid pavement, selfcompacting concrete and other applications.
Index terms high strength concrete,workability,compressive strength, split tensile strength, polyster fibres, polypropylene fibres,mechanical properties of concrete. Chemical treatments of polypropylene fiber surfaces used in fiber reinforced concretes m. The objective of this research is to produce polypropylene fibers with improved interface bonding with a concrete matrix. Influence of polypropylene fiber on strength of concrete american. The inclusion of silica fume particles in the extrusion process significantly changed the properties of the fiber and therefore contributed to the performance of these extruded fibers in the concrete matrix. A pp short fiber 1 obtained by meltspinning pp mainly composed of regenerated pp and highly. Pervious concrete, porosity, permeability, polypropylene fiber cite this article. Selfconsolidating concrete scc is an emerging class of concrete which flows and consolidates on its own without vibration. Durability of glass, polypropylene and steel fiber reinforced. Durability of glass, polypropylene and steel fiber. Other suggested applications for concrete containing fibers can be added to concrete and also state that polypropylene fibers include structures such as median adding fibers reduces shrinkage, inhibits shrinkage barriers that are subjected to impact loads, placements cracking, reduces permeability and improves impact where all materials must be nonmetallic and areas re and abrasion resistance. Sustainable use of waste polypropylene fibers and palm.
In particular, polypropylene fibers ppf are widely used in structural concrete to. Among the polymer fibers, the polypropylene fibers enjoy popularity in the domain of concrete 4, 5 and the nylon fibers show a rising acceptance6, 7. Properties of polypropylene fiber reinforced concrete. Hybrid reinforcement of asphaltconcrete mixtures using glass. In this study, the results of the strength properties of polypropylene fiber reinforced concrete have been presented. Polypropylene fiber is helpful to ar rest cracking and. When polypropylene fibers are used in concrete as secondary reinforcement,they are added in such low levels 0.
Fortagreen blend consists of 100% recycled polypropylene fibrillated network fibers and a highperformance twistedbundle macromonofilament fiber, designed to mix, distribute, and finish well. Effect of polypropylene fiber on oil well cement behavior. Applications and properties of fibre reinforced concrete. It was found out that the concrete with higher fiber proportions showed significantly higher residual load carrying capacity postcracking response. Lately, the use of pp fibers has increased greatly in construction of structures, because the addition of fibers in concrete improves the toughness, flexural strength, tensile strength and impact strength, as well as failure mode of concrete. The polypropylene fiber was collected from siddha chemicals, pune. For mixtures incorporating polypropylene fibers, the mixing temperature shall not e xceed 143c 290f. To use these fibers, concrete mix design does not have to be altered, and no special equipment or slump modifications are required, even for pumping or shotcreting. The primary benefits of proconm are shrinkage and thermal crack control. Fip 8 design and specification of fiberreinforced concrete.
To obtain pp short fiber for reinforcing concrete having high tensile strength, excellent reinforcing effect on hydraulic composition such as concrete, and excellent adhesion to hydraulic composition, using recycled polypropylene pp as a raw material. Mechanical properties of polypropylene fiber reinforced concrete and the effects of pozzolanic materials. A fiber mix generallyrequires more vibration to consolidate the mix. Significant change is found for compressive strength, flexural, split tensile and shear improves greatly, when compare to the plain concrete. Fiber characterization it was used only one type of polypropylene. According to the results, the greatest increase in strength was related to this group. Polypropylene fibers are used to provide what is termed secondary reinforcement, or the encouragement of a desired material. For fiber reinforced concrete to be a viable construction material, it must be able to compete economically with existing reinforcing system. The aim of the study was to achieve maximum strength of concrete by using optimum weight of polypropylene fibers. Description sikafiber ppf is a fibrillated polypropylene fiber for use in fiber reinforced concrete.
Polypropylene fiber reinforced concrete is an embryonic construction material which can be described as a concrete having high mechanical strength, stiffness and durability. Polypropylene fiber in concrete mix design is used for multiple purposes that includes rigid pavement, self compacting concrete and other. Several useful documents on fiber reinforced concrete frc have been developed by aci committee 544, fiber reinforced concrete, including a design guide, aci 544. Chemical and physical properties of cement chemical analysis, % calcium oxide cao 61. This paper presents an overview of the effect of polypropylene pp fibers on various properties of concrete in fresh and hardened state such as compressive strength, tensile strength, flexural. Polyester though not as widely used as polypropylene fibers, polyester fibers are offered by several manufacturers. Utilizing polypropylene fibers to improve physical and mechanical. These fibers are manufactured using conventional melt spinning. All the polypropylene and steel fibers have no great beneficial effect on the abrasionerosion resistance of concrete. Effect of fibrillated polypropylene fiber reinforcement on.
Researchers have studied cement concrete and polypropylene fiber reinforced concrete and have investigated the effect of fibers on the mechanical properties of. Concrete has a capacity to enhance its property with the help of man made fiber like polypropylene fiber which are stronger and more ductile than concrete. Jun 01, 1983 download the pdf version of this article. This type of concrete is known as fibre reinforced concrete. Polypropylene twine is cheap, abundantly available, and like all manmade fibers of a consistent quality. Polypropylene fiber reinforced concrete much work has gone into researching the properties of synthetic fiber reinforced concrete over the past decade, in particular polypropylene fiber reinforced concrete, as the addition of fibers can provide effective, inexpensive reinforcement for concrete. The fire resistance of concrete with polypropylene fibers. By utilization of polypropylene fibers in concrete not only optimum utilization of materials is achieved but also the cost reduction is achieved. In order to improve these properties of plain concrete, an attempt has been made to study the effect of addition polypropylene fiber in ordinary portland cement.
The interest in the use of fibers for the reinforcement of composites has increased during the last several years. Lovata this paper reports the results of an experimental investigation to determine the effects of chemical treatment of polypropylene fibers ppf used in reinforced concretes. Theyre factorymade in giant scale and have fourth largest volume in production once polyesters, polyamides and acrylics. Study of strength of polypropylene fiber reinforced concrete. Finally simple polypropylene fibers in concrete increased splitting tensile strength of 10. The results illustrated that glass fiber reinforced ac and pp fiber reinforced ac treatments. Solutions for concrete problems using polypropylene fibre. Flexural strength and behavior of polypropylene fiber reinforced. The evaporation of concrete surface water is a factor in creating the contract paste fracture in concrete which leads to the formation of tension stress since the concrete starts to strengthen 3. The mechanical properties of polypropylene fiber reinforced. In this research, the effect of polypropylene fiber on oil well smart cement mix is investigated. Pdf performance of polypropylene fibre reinforced concrete. Effect of polypropylene fibers on concrete compressive strength plain fiber reinf. Concrete, polypropylene fiber, destructive test, non destructive tests, compressive strength, flexural strength i.
Mechanical properties and durability of polypropylene and. Moreover, the polypropylene mesh fiber is better than the polypropylene monofilament fiber in improving flexural strength and toughness of concrete, but the two types of polypropylene fibers are inferior to steel fiber. In these dissertations an attempt will be made to view the behavior of concrete mixed fibre with polymer fibre reinforced concrete in comparison with plain concrete. Moreover, the concrete mixtures had acceptable workability and showed only slight loss in compressive strength due to inclusion of fibers. Durafiber dramatically reduces cracking in concrete caused by drying shrinkage. Two kinds of fiber that very often used in the concrete are. The tests intended to provide a general reference on how polypropylene fibers affect the major concrete properties under various fiber content and. The evaporation of concrete surface water is a factor in creating the contract paste fracture in concrete which leads to the formation of tension stress since the concrete. Effect of punching on polypropylene fiber tapes for. The use of fiber reinforced concrete has increased in.
Besides, the compressive strength decreases slightly. Polypropylene fibers are synthetic fibers obtained as a byproduct from textile industry. Recycling of polypropylene fiber reinforced concrete. Concrete macro synthetic fibres can reduce or in some cases eliminate steel reinforcement required.
Polypropylene fiber in concrete mix design is used for multiple purposes that includes rigid pavement, selfcompacting concrete and other applications. Activities linked to concrete, from the production of the. Chemical treatments of polypropylene fiber surfaces used in. The results illustrated that glass fiber reinforced ac and pp fiber. Sikafiber ppf is primarily used for the purpose of providing secondarytemperatureshrinkage reinforcement in concrete. Polypropylene fibers polypropylene fibers are new generation chemical fibers. Pdf using polypropylene fibers in concrete to achieve maximum. Experimental study on the performance of polypropylenefiber. Polypropylene fiber reinforced concrete mixtures had a tensile strength of 3. The optimal percentage of polypropylene fiber that produced improved compressive and flexural strengths were found to lie within 0.
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