Structural Performance of Concrete: Exploring the Limits of Steel Fiber Reinforcement (original) (raw)
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Evaluation of Tensile Strength of Concrete with Steel Fiber
CERN European Organization for Nuclear Research - Zenodo, 2022
Concrete strength is an important point in the building. Several materials have been used as an addition to the common concrete mix to strengthen it, such as but not limited to crumb rubber, polypropylene fibers, steel fibers, and so on. The size of mixed material will not matter much except for joint construction. Joint construction on reinforced concrete has a narrow material workspace which makes the size of mixed material matter. This paper will evaluate the strength of steel fiber over a narrow space. From this evaluation , we conclude that increasing the number and the length of the wire will rise concrete pull strength but will lower its workability.
Effect of Steel Fibers on the Mechanical Strength of Concrete
Civil Engineering Journal
The study is based on designing the mix design of the concrete for the class named MR_DK_E1: C30/37, one of the most widely used classes of normal concrete. To see the effect of the fibers on concrete, we will design three mixtures that in other components are similar to the first mixture "Normal Concrete",but as an additive, we will add 0.75%, 1.5%, and 2.0% of steel fiber (Romfracht SRL Company Profile) to the mass of concrete. Although some researchers have already detailed the favourable qualities of steel fiber reinforced concrete (SFRC), there is very little data regarding the design and performance of this type of concrete. To get to know something more in terms of the properties of steel fiber reinforced concrete, during the realization of this work we will perform some experimental tests based on European standards to understand closely how fibers affect the growth and improvement of properties of concrete with lime aggregate and local cement CEM II/BM (WL) 42.5N,...
PERFORMANCE OF CONCRETE BY USING STEEL FIBRE An Experimental Study
2017
1M.Tech Scholar, Jagannath University, jaipur, Rajasthan, India 2Asst Professor, Department of Civil Engg, Jagannath University, jaipur, Rajasthan, India 3 H.O.D, Department of civil engineering, jagannath university, jaipur, Rajasthan, India ---------------------------------------------------------------------***--------------------------------------------------------------------Abstract The purpose of this research is based on the investigation of the use of steel fibres in structural concrete to enhance the mechanical properties of concrete. The objective of the study was to determine and compare the differences in properties of concrete containing without fibres and concrete with fibres. This investigation was carried out using several tests, compressive test and flexural test. A total of eleven mix batches of concrete containing 0% to 5% with an interval of 1% by wt. of cement. ‘Hooked’ steel fibres were tested to determine the enhancement of mechanical properties of concrete. ...
Effect of steel fibers on the concrete strength grade: A review
IOP Conference Series: Materials Science and Engineering, 2020
The use of concrete reinforced with steel fibers has emerged as an effective material which has the advantages to be used in the most unconventional situations in reinforced concrete structures. These advantages involve reinforcements in structures that intend to resist loads in extreme conditions or change in the type of use, design and or construction errors, degradation of materials (carbonation or corrosion of reinforcement) and also the possible occurrence of accidents such as fires, floods, gusts of wind and earthquakes. In addition, the increasing use of this reinforcement system requires the development of more conclusive studies regarding the characteristics and behaviour of the steel fibers, as well as a critical evaluation of this material and its techniques. This manuscript presents a review on the interaction between steel fibre and the concrete substrate. Initially, a brief description of some fibers materials is made, followed by a summary of some works on adhesion between steel fibres and concrete under static loads. Finally, a summary of the few works on the main contribution of the steel fibers application to increase the strength after the cracking of concrete matrix during loading.
Journal of Civil Engineering and Materials Application, 2021
Fiber concretes, as a new generations of concrete, have considerably attracted the attention of researchers and engineers for a couple of decades. Fibers play a very important role for improving the weaknesses of concrete, including the tensile and flexural strengths of concrete. In this paper, the effect of length and percentage of steel fibers on the tensile and compressive strengths of concrete is investigated. For this propose, three concrete samples including plain concrete and fiber concretes with steel fibers with lengths of 3 and 5 cm each with different volume ratios (i.e., 0.5, 1, and 1.5%) have been tested. In addition, the samples of the plain concrete are made to determine the effect of fibers on the strength of the concrete. Afterward, using the hydrulic jack machine, both tension and compression strength tests are performed on the concrete specimens. Based on the obtained results, it is observed that with increasing the length and percentage of steel fibers, the tensile and compressive strengths of the concrete specimens are increased. Furtheromre, the samples containing a combination of 3 and 5 cm steel fibers in concrete have lower strength than samples with only 5 cm fibers and more strength than samples with only 3 cm fibers. According to experiments, in order to increase the tensile and compressive strength of concrete, the use of 5 cm steel fibers with different percentages is preferable to 3 cm steel fibers.
Evaluation the influence of steel-fiber on the concrete characteristics
Periodicals of Engineering and Natural Sciences (PEN)
The impact of steel fibers on the engineering characteristics of concretes were explored experimentally in this work. Steel fibers of 0.5, 0.7, and 0.9 percent by volume fraction were applied to concretes mixture with water/cements (W/C) proportions of 0.43 to accomplish this. There has been a total of 24 cubic specimens produced for compressive strengths testing, 24 cylindrical specimens for splitting tension strengths testing, and 12 cubic specimens for toughened unit weight testing. The experimental findings reveal that applying 0.5 percent to 0.9 percent of fibers made of steel to concrete boosts both compressive and tension strengths concurrently when compared to ordinary concretes; however, there is no discernible gain in hardened unit weight with increased fiber amounts.
Comparison Of Mechanical Properties Of Steel Fiber-Reinforced Concrete And Normal Concrete
2020
Abstract: In order to be useful in construction, the product must meet minimum compressive requirements, which are determined through a Mechanical Test of Concrete and to check the strength of the concrete used for buildings and other structures, where the principal stresses are compressive, cube samples were obtained and tested in compression testing machine. As Pillars, beams and pipes needs high values of strength, different types of materials have been explored in order to increase life of such structures. Steel reinforcement is widely used in which cages of steel bars are used along with concrete. The use of steel fibers which are very smaller in size and diameter are also becomes familiar in these days. In present work, two types of steel fibers s named as straight and crimped steel fibers has been investigated in Mix 25 concrete design mix by proportion with weight of cement. Compressive strength and flexural strength tests are carried out on designed concrete mixes in which ...
PERFORMANCE OF CONCRETE WITH ADDING OF STEEL FIBERS
Concrete made with Portland cement has certain characteristics: it is relatively strong in compression but weak in tension and tends to be brittle. These two weaknesses have limited its use. Another fundamental weakness of concrete is that cracks start to form as soon as concrete is placed and before it has properly hardened. These cracks are major cause of weakness in concrete particularly in large on site applications leading to subsequent fracture and failure and general lack of durability. Fiber reinforced concrete (FRC) may be defined as a composite materials made with Portland cement, aggregate, and incorporating discrete discontinuous fibers. Fiber-reinforced concrete (FRC) is concrete containing fibrous material which increases its structural integrity. It contains short discrete fibres that are uniformly distributed and randomly oriented – each of which lend varying properties to the concrete. In addition, the character of fibre-reinforced concrete changes with varying concretes, fibre materials, geometries, distribution, orientation, and densities. In this experimental investigation, an attempt has made to find out strength related tests like Compressive Strength, Split Tensile Strength, Flexural Strength using hooked end Steel Fibers with to volume fraction of 0.5% and 1% and for aspect ratio and considered for M40 Grade of concrete. Number of specimens were casted, cured and tested. The real contribution of the fibers is to increase the toughness of the concrete, under any type of loading and permit the fiber reinforced concrete to carry significant stress over a relatively large strain capacity in the post cracking stage. The results of the tests showed that the strength properties are enhanced due to addition of fibers.
In the recent years, lots of researches have been performed to improve the mechanical and durability properties of concrete. SFRC is found to be one of the best ways for the reduction of the brittleness of concrete and enhance its engineering properties. Steel fibers can be defined as a short length of steel which is used according to its aspect ratios (i.e. ratio of Length to diameter) in the range of 20 to 100. This paper presents the introduction of steel fiber, review of experimental studies which has been done in the previous years and comparison between three different types of steel fibers i.e. (Straight, Hooked, and Crimpt) on the basis of their effect on the mechanical properties of concrete.
Mechanical properties of steel fibre concrete
Magazine of Concrete Research, 2013
Two types of hooked fibres and one type of twisted steel fibre were used as reinforcement in beam specimens of size 150 mm × 150 mm × 500 mm. A series of experiments was carried out to investigate the effect of size, shape and amount of steel fibres on the mechanical properties of concrete, such as the compressive strength, first-crack flexural strength and ultimate flexural strength, modulus of elasticity, flexural toughness and ductility. The guidelines of ASTM C1609 were used to carry out the bending tests. The compressive strengths of the concrete mixes were obtained from cylinder tests as per the guidelines of ASTM C39. The experimental findings indicate that addition of steel fibres in concrete can slightly enhance the compressive strength and modulus of elasticity, but remarkably improve flexural strength, flexural toughness and ductility. Results were further extended to find a simple formula for modulus of rupture (MOR) of steel fibre concrete, which is based on ACI 318 cod...