Strength And Durability Properties Of Steel Fiber Reinforced Self Compacting Concrete (original) (raw)
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Performance of Medium Strength of Steel Fibre Reinforced Self-Compacting Concrete (SFRSCC)
IOP Conference Series: Materials Science and Engineering
This paper presents the physical and mechanical performance of steel fibre reinforced self-compacting concrete (SFRSCC) using fly ash as cement replacement at 30% by weight of cement. It is understood that the weakness of concrete is the tensile resistance which is can be improve with the addition of steel fibre. This paper deals with the medium compressive strength class of SCC (30-40MPa) with the inclusion of hooked-end steel fibres. Four design mixes of SFRSCC with different steel fibres contents (0%,0.5%,0.75%,1.0% and 1.25%) were designed. The fresh properties of SCC and SFRSCC were tested through slump flow, V-funnel L-box and sieve segregation to characterize the self-compactability characteristics of the mixes. Hardened properties of SCC and SFRSCC were determined through compressive test, flexural test and tensile test. Results shows that there is negative influence on the fresh state properties of SFRSCC with steel fibre content of 1% and more. The highest compressive strength, splitting tensile strength and flexural strength achieved by SFRSCC with optimum volume of 0.75% steel fibre.
International Journal for Research in Applied Science & Engineering Technology (IJRASET), 2022
This paper presents an experimental program to investigate the strength and durability properties of high-strength selfcompacting concrete (HSSCC) with and without steel fibers. The research work is divided into two approaches. These approaches are the development of (HSSCC) by making different trials and then studying mechanical and durability properties. Crimped-type steel fibers are used. Fly ash and Alccofine have been used as mineral admixtures to fulfil the power requirement. Chemical admixture has also been used for workability. The test results of plain and fibrous HSSC concrete indicated that steel fiber increases the tensile strength and makes concrete more durable and impermeable
Experimental Study on Toughness Property of Fiber Reinforced Self Compacting Concrete (FRSCC)
2014
The objective of this work is to investigate the toughness property of the fiber reinforced self compacting concrete (FRSCC) through experimental studies. In this work, different (0.5%, 1.0%, 1.5%, and 2%) percent of steel fibers are added by volume of concrete and (0.5% & 1.0%) percent of poly-propylene are added by mass of binding material. To achieve the self compacting concrete (SCC) mix design has been done according to the EFNARC guidelines. The limitations also achieved according to the European guidelines. By using different types of fibers the toughness property of the FRSCC has been studied. To find the toughness of FRSCC the JSCE SF-4 method is used. It has been observed that the toughness increased with increase in percentage (%) of fibers up to 1.5%. While, increase in percentage (%) fiber content beyond 1.5% resulted in lower toughness for the steel fibers. It give the only the limitation of steel fiber for SCC is up to 1.5% of volume of concrete. The comparative study...
Generally SCC requires a large content of binder and chemical admixtures Compared to ordinary concrete; its material cost is generally 20-50% higher, which has been a major hindrance to a wider implementation of its use. There is growing evidence that incorporating high volumes of mineral admixtures and micro fillers as partial replacement for Portland cement in SCC can make it cost effective. However, the strength and durability of such SCC needs to be proven. Compared to normally vibrated concrete, self-compacting concrete possesses enhanced qualities and improves productivity and working conditions due to elimination of compaction. SCC generally has higher powder content than Normally Vibrated Concrete (NVC) which can increase cost and also cause temperature rise during hydration as well as possibly affect other properties such as creep and shrinkage, thus it is necessary to replace some of the cement by additions to achieve an economical and durable concrete. Concrete is most widely used construction material because of ease of construction and its properties like compressive strength and durability. It is difficult to point out another material of construction which is versatile as concrete. It is well known that plain concrete is very good in resisting compressive strength but possesses low specific modulus, limited ductility and little resistance to cracking. Internal micro cracks inherently present in the concrete and its poor tensile strength is due to propagation of such micro cracks eventually leading to brittle failure of concrete. The inclusion of fibers in SCC will extend its benefits. To improve strength properties it is useful to reinforce the concrete with fibers. Steel fibers are having good tensile strength and are also chemically inert, so a trail is made to improve the Self Compacting Concrete properties. In this article steel fibers were used, and the effects of fiber inclusion on the workability of fiber reinforced self-compacting concrete (FR-SCC) is studied. It is observed that there is an overall improvement of all the properties of SCC with the blend of Fly Ash, Rice Husk Ash, Steel Fibers, Sika Viscocrete to improve the cement dispersion.
2021
Steel fiber reinforced self-consolidated concrete (SFRSCC) has the advantages of both selfconsolidated concrete and fiber reinforced concrete. Thirteen concrete mixtures (with short and long steel fiber) were prepared including control mix. The steel fiber volume fraction varied from 0 to 2.4% by the volume of concrete. The fresh properties of SCC were evaluated using slump flow test, J-ring test, V-funnel test and L-Box test. Bond strength, compressive strength and flexural tests were performed in order to investigate mechanical properties. Water sorptivity, water absorption and porosity, rapid chloride permeability test (RCPT), corrosion and freezethaw cycles tests were performed in order to investigate the durability properties. Bond strength gain of 244% with respect to control mix was observed. Moreover, the compressive strength and MOR gained 45% and 127%, respectively. There was no significant weight loss of the concrete specimen after freeze-thaw cycles for concrete mixture ...
International Journal of Emerging Trends in Engineering and Development, 2014
Addition of different types of fibres leads to increasing the ultimate strength of self compaction concrete. Every fibre has its own advantages. An attempt has been made to study the effects of steel fibres on the strength and behavior of self compaction concrete (SCC) flexural, compressive, tensile elements. Twenty four cubes, twenty four cylinders, twenty four beams were cast for this study including six plain SCC cubes, six plain SCC cylinders, six plain SCC beams without fibres in order to compare its seven days and twenty eight days ultimate strength. The variable in this study was percentage of volume fraction of fibres (0, 0.1%, 0.3% and 0.5%). The ultimate strength of all specimens was found to have improved significantly due to addition of fibres. A marginal improvement in the ultimate strength was found. More number of trial mix design was conducted in order to attain self compactability of concrete. In order to increases the fineness and workability of concrete, fly ash (class C) from tuticorin thermal power plant station was used. Super plasticizer (conplast 430) was used as water reducing admixture. Slump flow test, V-funnel test, t-box test were conducted in order to ensure self compactability of concrete. Even though glass fibre has good engineering properties than other fibres, because of handling, usage and economy, researchers were not involved in self compaction concrete, with steel fibre. Hence there exist technical knowledge gaps in this area. This gap in the existing knowledge suggests that a research programmed to study steel fibre reinforced self compaction concrete. Hence an attempt has been made through the present investigation to conduct an experimental programme to study the ultimate strength and durability aspects of steel fibre reinforced self compaction concrete. In order to accomplish the above objectives, the present investigation has been divided in to two major phase. The first phase deal with the study of ultimate strength steel fibre reinforced self compaction concrete. The second phase deals with the durability aspects of steel fibre reinforced self compaction concrete.
Mechanical Properties of Steel Fiber Reinforced Self-Compacting Concrete
International journal of engineering technologies, 2018
In this study, steel fiber reinforced self-compacting concrete (SFR-SCC) specimens were examined by considering the effects of different parameters on the material performance and to promote the use of fiber materials in building industry. Use of steel fibers in SCC is still limited due to lack of required codes and standards in this field. More research is required to understand the effects of steel fibers on mechanical properties of the concrete. For this purpose, 5 mixes; control and reinforced with 2 different fiber volumes and two different fiber types; were produced. Compressive strength, splitting tensile strength and 3-point notched bending tests were carried out on these specimens for thoroughly evaluating mechanical performance of steel fiber reinforced self-compacting concretes. Keywords Steel fiber reinforced self-compacting concrete, flexural toughness, ductility, three point notched bending, flexural strength.
STUDY ON M60 GRADE STEEL FIBRE REINFORCED SELF COMPACTING CONCRETE
The use of self-compacting concrete is spreading world wide because of its very attractive properties in the fresh state as well as after hardening. SCC improves the quality, durability and reliability of concrete structures and eliminates some of the potential for human error. It will replace manual compaction of fresh concrete with a modern semi automatic placing technology and in that way improve health and safety on and around the construction site. As the main feature of SCC is the behavior in the fresh state, the mix design is especially focused in this point. SCC is designed to be able to flow under its own weight without external vibration and with sufficient viscosity. The flow behavior can be roughly evaluated by the slump flow test. For SCC we will need a high final spread and a maximum limit to the slumping time T 50cm. A concrete mix can only be classified as self compacting concrete if the requirements for all three characteristics i.e. filling ability, passing ability, segregation resistance, are fulfilled.
Mechanical properties of self-compacted fiber concrete mixes
HBRC Journal, 2014
Increased productivity and improved working environment have had high priority in the development of concrete construction over the last decade. The major impact of the introduction of self-compacting concrete (SCC) is connected to the production process. The productivity is drastically improved through the elimination of vibration compaction and process reorganization. The working environment is significantly enhanced through avoidance of vibration induced damages, reduced noise and improved safety. Additionally, SCC technology has improved the performance in terms of hardened concrete properties like surface quality, strength and durability. The main objective of this research was to determine the optimum content of fibers (steel and polypropylene fibers) used in SCC. The effect of different fibers on the fresh and hardened properties was studied. An experimental investigation on the mechanical properties, including compressive strength, flexural strength and impact strength of fiber reinforced self-compacting concrete was performed. The results of the investigation showed that: the optimum dosage of steel and polypropylene fiber was 0.75% and 1.0% of the cement content, respectively. The impact performance was also improved due to the use of fibers. The control mix specimen failed suddenly in flexure and impact, the counterpart specimens contain fibers failed in a ductile manner, and failure was accompanied by several cracks.
A STUDY ON STRENGTH CHARACTER OF SELF COMPACTING CONCRETE WITH FIBRE REINFORCED CONCRETE
A self-compacting concrete (SCC) is the one that can be placed in the form and can go through obstructions by its own weight and without the need of vibration .its first development in Japan in 1988, SCC has gained wider acceptance in Japan, Europe and USA due to its inherent distinct advantages. The major advantage of this method is that SCC technology offers the opportunity to minimize or eliminate concrete placement problems in difficult conditions. It avoids having to repeat the same kind of quality control test on concrete, which consumes both time and labor. Construction and placing becomes faster& easier. It eliminates the need for vibration & reducing the noise pollution. It improves the filling capacity of highly congested structural members. SCC provides better quality especially in the members having reinforcement congestion or decreasing the permeability and improving durability of concrete. The primary aim of this study is to explore the feasibility of using SCC by examining fresh and hardened properties by introducing glass (0.1%) and steel (1.5%) fibers of M40 Grade SCC and comparing the same with M40 Grade Plain SCC. Also, to study the fresh and hardened properties of M80 Grade SCC with varying Packing Factors i.e. 1.12,1.14,1.16,1.18 and comparing the same with M80 Grade conventional concrete When the fiber reinforcement is in the form of short discrete fibers, they act effectively as rigid inclusions in the concrete matrix. Physically, they have thus the same order of magnitude as aggregate inclusions; steel fiber reinforcement cannot therefore be regarded as a direct replacement of longitudinal reinforcement in reinforced and prestressed structural members. However, because of the inherent material properties of fiber concrete, the presence of fibers in the body of the concrete or the provision of a tensile skin of fiber concrete can be expected to improve the resistance of conventionally reinforced structural members to cracking, deflection and other serviceability conditions. Compressive strength of concrete is measured by testing standard cubes (150mm x 150mm x 150mm) at the age of 7 days, 28 days and 90 days, The tests were conducted on varying percentages of steel fibers and studied for their torsional resistance for combined loading under torsion-bending-shear.The existing literature indicates that many researchers have studied the torsional strength, torsion to moment or torsion to shear of steel fiber reinforced concrete beams. However, scanty literature is available on testing of specimen blended with steel crimped fiber and flyash subjected to combined torsion, bending and shear.Hence, by observing the existing literatures, this work is carried out with different percentages of fibers with the inclusion of admixtures to form binary blended concrete to study the behavior of specimen subjected to combined torsion, bending and shear and to achieve the optimum fiber percentage for Binary Blended Fiber Reinforced Concrete Beams.