Experimental Studies on Structural Behaviour of Hybrid Fibre Reinforced Concrete (original) (raw)
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An Experimental Study on Effect of Hybrid Fibres in Reinforced Concrete
This project focuses on the experimental investigation carried out on hybrid fibre reinforced concrete (combination of crimped steel fibre and a non-metallic polyester fibre) by varying the steel fibre content(0.1 to 0.25% of volume of concrete) and keeping a constant polyester fibre content(0.20% of weight of cement) which was prepared using normal mixing, compaction and curing conditions. The workability studies and the mechanical properties namely, compressive strength on cubes, splitting tensile strength and modulus of elasticity on cylinders, flexural strength on beams were studied for concrete prepared using 4 different proportions of steel fibre content. It is found that all HyFRC specimens shows better mechanical properties than conventional concrete mix. In our study the maximum strength parameters occurred for 0.15% of steel fibre content with constant polyester fibre content of 0.20%. The failure mode in HyFRC is different from that of conventional concrete mix. The fibres are able to hold the matrix together even after extensive cracking. Fibre addition results in decrease in workability and creates difficulty in compaction which may results in reduction in strength for increased fibre content. Steel fibre helps in bridging action and polyester fibre contributes in delaying the formation of micro cracks.
Flexural Properties of Hybrid Fibre Reinforced Concrete -A Comparative Experimental Study
Fiber-reinforced concrete (FRC) is concrete containing fibrous material which increases its structural integrity. It contains short discrete fibers that are uniformly distributed and randomly oriented. The most important advantages are hindrance of macro-cracks' development, delay in micro-cracks' propagation to macroscopic level. In this project the flexural properties were studied for concrete prepared using different hybrid fibre combinations of glass fibres and polypropylene fibres. The volume fraction of the glass fibres and polypropylene fibres used in this study are 0.4% and 0.5% of total volume of concrete. The flexural properties were studied using centre point loading method on beam specimens. The objective of this study is to evaluate flexural strength of fibre reinforced concrete with respect to different combination of glass fibres and polypropylene fibres. It is observed that quantity of fibres both glass fibres and polypropylene fibres play significant role in increment flexural properties of concrete.
2018
The addition of fibres into the brittle concrete shall imparts tensile nature. The addition of two or more fibres in the concrete named as Hybrid Fibre Reinforced Concrete(HFRC) which derives more benefits from each of the individual fibres than the Single Fibre Reinforced Concrete (SFRC). The present experimental investigation focus on the properties of HFRC using various percentages of Polypropylene and steel fibres for M20 grade of concrete. To control the propagation of micro crack to macro crack, polypropylene fibres of Recron 3s (PPF-0.1%, 0.2%, 0.3%, 0.4%) have used, while the double hooked end steel fibres (SF-0.5%, 1.0%, 1.5% and 2%) are used to impart the tensile nature in the concrete. The objective of the study is to observe the transformation of concrete from brittle to ductile and to find the optimum performance of fibres in HFRC. The stress strain behavior of Hybrid Fibre Reinforced Concrete is studied by comparing with individual fibre incorporation.The study conclude that the hybridization of metallic and non-metallic fibres has the ability to arrest the propagation of micro and macro cracks in the cement matrix of the concrete with increased extensibility and tensile nature.
A Literature Study of Hybrid Fibre Reinforced Concrete
The drawbacks are that the concrete has been improved by using hybrid fibre in concrete. By hybridization benefits from two different fibres are utilized in a single concrete mixture. The hybrids fibres studied are basalt-polypropylene fibre, polypropylene-steel fibre, steelcoconut fibre, polypropylene-e-waste fibre, polypropylenepolyvinyl Alcohol and steel-glass-polypropylene fibre. The properties that are improved using hybrid fibres are compressive strength, tensile strength, flexural strength, limited crack propagation, and improved durability of the concrete structure. In maximum cases slump value decrease with an increase in fibre percentage.
IJERT-Investigations on Mechanical Properties of Hybrid Fibre Reinforced High Strength Concrete
International Journal of Engineering Research and Technology (IJERT), 2013
https://www.ijert.org/investigations-on-mechanical-properties-of-hybrid-fibre-reinforced-high-strength-concrete https://www.ijert.org/research/investigations-on-mechanical-properties-of-hybrid-fibre-reinforced-high-strength-concrete-IJERTV2IS121114.pdf Concrete with a single type of fiber may improve the desired properties to a limited level. A composite is termed as hybrid, if two or more types of fibers are rationally combined to produce a composite that derives benefits from each of the individual fibers. This paper focuses on the experimental investigation of high strength concrete with steel fibers and combination of steel and polyolefin fibers (hybrid) by testing of compressive strength, splitting tensile strength of cylinders and flexural strength of prisms. For this ACI 211-4R-93 guide line was followed to design the high strength concrete of grade M60. Each test the high strength concrete specimens were cast and treated as control specimens, other specimens were cast high strength concrete added with steel fibers at the volume fraction of 0.5%, 1.0%, 1.5%, and 2.0%. At each volume fraction Steel-polyolefin fibers were added at 80%-20% and 60%-40% combinations. Test results showed that the compressive strength, splitting tensile strength and modulus of rupture improved with increasing volume fraction. Regression analyses were done to predict the values of compressive strength, splitting tensile strength and modulus of rupture of all parameters. The prediction values were matching with the experimental results.
Mechanical Properties of Hybrid Fibre Reinforced Concrete With Steel And Synthetic Fibre.
International Journal of Engineering Sciences & Research Technology, 2013
The experimental study deals with Hybrid fibre reinforced concrete with the use of (Polypropylene and Recycled polyethylene terephthalate RPET). The M40 grade concrete used was designed by using IS10262-2009 code. The steel fibre and synthetic fibre were added at the volume fractions up to 0.5%. Test results showed that the fibres, when used in a hybrid form, could result in superior composite performance compared to their individual fibre-reinforced concretes. The results indicate that concrete containing a fibre combination of 0.38% steel fibres & 0.12% PET fibres can be adjudged as the most appropriate combination to be employed in HyFRC for compressive strength, splitting tensile strength and flexural strength. Abstract
Experimental Investigation on Strength of Hybrid Fiber Reinforced Concrete
International Journal of Scientific Research in Science, Engineering and Technology, 2022
Cementitious substances are really no doubt the most extreme typically applied and basic substances withinside the developing region. From the get-move withinside the reestablishing cycle, those concrete basically based absolutely substances is most likely accurately managed and outlined into the best demonstrated frameworks and fundamental plans. Regardless, the delicacy of those concrete fundamentally based absolutely substances, along their solidified properties, is answerable for the advancement of breaks essentially as their multiplication while revealed to pressures. The mechanical properties of the materials are destroyed by a fundamentally unstable location, necessitating extreme support or perhaps reconstruction of such materials in a normally brief presence hope. New concrete-based materials with improved toughness characteristics, such as break resistance, are thus required inside the improvement area. Standard concrete has replaced fiber-built concrete since it is a delicate material. Although using just one type of fibre might have artistic effects on cement's mechanical properties, hybridization can make up for the absence of other fibre types and adapt to their potential advantages. In this proposal, the effect of using glass fibre and polypropylene fibre to aid concrete is investigated in order to assess the mechanical properties of the significant grid.Therefore, 15 three-dimensional shapes and 15 offices of glass fibre supported concrete (GFRC) with different costs (zero.2 rate, zero.4 rate, zero.6 rate, zero.8 rate, 1.0 rate, 1.2 rate) in degree of M30 grade concrete have been projected inside the wake of reestablishing models having been assessed for best compressive and pressure were given at 1% Three-dimensional squares and chambers are projected with remarkable costs of polypropylene fibre while sparing the glass fibre consistent after participating in best power at the ideal component of glass fibre. This results in approximately the ideal portion of mix fibre built up substantial power of 1% glass and zero.6 rate polypropylene fibre. To determine the flexural strength (70cm X 10cm X 15cm) and shear (100cm X 10cm X 15cm) of half-breed fibre built up concrete, the appropriate piece of fibres is applied (HFRC). The check disclosures demonstrate that, when separated from Ostensible Concrete, the half-breed kind of fibre improves compressive, manageability, flexure, and shear respects.
An Investigation on Mechanical Properties of Hybrid Fiber Reinforced Concrete
A composite can be termed as hybrid, if two or more types of fibers are rationally combined in a common matrix to produce a composite that derives benefits from each of the individual fibers. The aim is to study the mechanical properties i.e. split-tensile strength and compressive strength on hybrid effect between steel fiber (SF) and chopped carbon fiber (CF). The test on Hybrid Fiber Reinforced Concrete (HFRC) is to be explored at steel fiber volume fraction 0.5%, 1%, 1.5% and carbon fiber 0.1%, 0.2%, 0.3% by the volume of cement with reinforcement and without reinforcement. For this study, 60 cubes of 150mm, 60 cylinders of 150mm diameter and 300mm height of different combination of SF and CF will be casted of M25 grade of concrete. After testing, effect of different combination and the optimized composition will be concluded. The testing results shows that the optimum of hybrid combination 0.3% CF and 1% SF gives the optimised response in terms of Split-Tensile Strength while hybrid combination of 0.3% CF and 1.5% SF gives the optimised response in terms of Compressive Strength.
Strength Characteristics of Hybrid Fiber Reinforced Concrete Produced with Different Aspect Ratios
International Journal for Research in Applied Science & Engineering Technology (IJRASET), 2023
Nowadays, fibre reinforced concrete is more popular due to its improved ductility properties. It can be transformed into a useful construction material in areas where earthquake pressures are likely to cause harm. The ability of the materials to absorb energy in these situations is crucial. The addition of various fibres, such as carbon, steel, polypropylene, or any other type of fibre, will increase the concrete's ability to absorb energy. There isn't enough research on the effects of using hybrid fibres with various aspect ratios to concrete. This experimental study sheds some information on how hybrid fibre reinforced concrete behaves when fibres of different aspect ratio are used. Strength characteristics like compressive strength, tensile strength, flexural strength, shear strength, and impact strength are determined for concrete produced by using fibers of different aspect ratios.
Study the Mechanical Properties of Hybrid Fiber Reinforced Concrete
There is increase in fiber use in concrete from last few decades. There is demand of providing cost effective technique with this innovative material while offering improved structural properties. The fibers can be used to replace the conventional bars partially or fully. This paper presents the mechanical properties of Hybrid Fiber Reinforced concrete (Steel and Polypropylene). The combined volume fractions of steel and polypropylene used were 1.25% and 1.75%. The hooked end steel fibers with fibrillated polypropylene were used in this study. The compressive strength and flexural strength of the HyFRC was determined in this study. The concrete of M20 grade concrete was used in this study. The significant improvement in compressive and flexural strength was observed in this study. There improvement in failure strain is observed in this study.