STUDY ON M60 GRADE STEEL FIBRE REINFORCED SELF COMPACTING CONCRETE (original) (raw)
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Experimental Study on Self-Compacting Concrete with various Percentage of Steel Fibres
Self-compacting concrete (SCC) represents one of the most outstanding developments in concrete technology since 1980s. At first developed in Japan in the late 1980s, SCC meanwhile is spread all over the world with a steadily increasing and varied number of applications. Due to its specific enhanced properties, SCC may contribute to a significant development of the quality of concrete structures and open up new fields for the application of concrete. Self-Compacting Concrete gets compacted and dense due to its self-weight. An experimental research has been carried out to determine different characters like strength and workability of Self-Compacting Concrete (SCC). Tests involving various fibre proportions for a particular mix of SCC were carried out. Test methods used to study the properties of fresh concrete were slump test, L-Box, U-Tube and V-Funnel. The properties like flexure, compressive and tensile strength of SCC were also investigated. Test Results shows that the workability characteristics of SCC are within the limiting constraints of SCC. The variation of different parameters of hardened concrete (M30 & M40) with respect to various percentage of steel fibre contents were analysed.
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.
Self compacting concrete (SCC) is an innovative concrete that does not require vibration for placing and compaction. It is able to flow under its own weight, completely filling formwork and achieving full compaction, even in the presence of congested reinforcement. The hardened concrete is dense, homogeneous and has the same engineering properties and durability as conventionally vibrated concrete (CVC). Self Compacting Concrete offers a rapid rate of concrete placement, with faster construction times and ease of flow around congested reinforcement. The elimination of vibrating equipment improves the environment on and near construction and precast sites where concrete is being placed, reducing the exposure of workers to noise and vibration. The improved construction practice and performance, combined with the health and safety benefits, make SCC a very attractive solution for both precast concrete and civil engineering construction..
Comparative Investigation on Properties of Self Compacting Concrete and Conventional Concrete
The primary aim of this study is to investigate the strength properties and flexural behaviour of beam, of M40 grade self-compacting concrete made with fly ash, GGBFS and a mixture of both in different proportions and compare its values with M40 grade conventional concrete. Conventional concrete is designed by using IS: 10262-2009 and SCC is designed using Modified Nan Su method. For this purpose cement is replaced by weight in three different proportions of 10%, 20% and 30% by fly ash and GGBFS respectively. Also 20 % of cement was replaced by fly ash and GGBFS in different proportions such as 70%:30%, 60%:40% and 50%:50%. The characteristics of SCC like passing ability, flow ability and resistance to segregation have been checked using slump flow, L box test and V funnel test as per EFNARC guidelines. Specimens are tested for compressive strength, flexural strength, splitting tensile strength.
Fresh properties and mechanical properties of steel fibre self-compacting concrete
2015
This paper investigates the fresh properties and mechanical properties of steel fibre selfcompacting concrete (SFSCC). Self-Compacting Concrete (SCC) has several advantages over normal concrete. SCC does not require any efforts of vibrations as it becomes compacted under its own weight. The application of SCC can be greatly improved with steel fibres, randomly added into the mixtures as to enhance the performance of concrete matrix. Addition of steel fibre has shown an improvement on the mechanical properties of concrete such as the tensile and flexural performance. The aim of this study is to determine the mechanical performance of SFSCC with different percentage of steel fibres and also to observe the fresh properties of SCC with and without steel fibres compare to the normal vibrated concrete (NC). In order to compare the performance of SFSCC, the properties of NC and SCC were also studied. The volume percentage of steel fibre is varies at every increment of 0.25% from 0 to 1.25%...
An experimental study on strength & flowability of self-compacting concrete
International journal of applied research, 2016
Self-compacting concrete (SCC) is a development of conventional concrete, in which the use of vibrator for compaction is no more required. Self-compacting concrete was first developed in 1988 to achieve durable concrete structures. Since then, various investigations have been carried out and this type of concrete has been used in practical structures in Japan, mainly by large construction companies. Investigations for establishing a rational mix-design method and self-compactability testing methods have been carried out from the viewpoint of making selfcompacting concrete a standard concrete. In the present work two grades M20 SCC mix was developed using EAFNARC mix design concept to arrive at the proportions of aggregate. Compressive strength tests were conducted to know the strength properties of the mixes. A simple mix design procedure has been developed using EAFNARC mix design on SCC. Compressible packing model is used to arrive at the proportion of aggregates, cement content a...
The essentiality of self-compacting concrete can be understood from the fact that there is an increasing problem of lack of skilled labor in the construction industry. The benefit of SCC is that it provides faster construction period and allows an early development of strength for concrete. The above paper deals with flexure and flow properties of self-compacting concrete reinforced with a combination of steel with sisal and abaca fibers. Three percentages of sisal (0.5%,1%,1.5%)or three of abaca (0.5%,1%,1.5%) are mixed with a uniform 0.3% and 0.6% of steel fibers. Split tensile strength and flexure strength are evaluated at 7 days and 28 days for various specimens of self-compacting concrete made by variation of fiber provides an understanding of mechanical properties and tests like Slump flow, J –ring and U-box test are performed for an understanding of flow of self-compacting concrete
Behavior of Steel Fiber-Reinforced Self-compacting Concrete
Advances in Sustainable Construction Materials
Self-compacting concrete (SCC) is broadly used for construction of civil engineering structures, like as in precast industries, high-rise buildings, and structures that need congested reinforcement. The main important characteristic of SCC in construction industry with the three main advantages which are workability, flowability and passing ability. The properties of self-compacting concrete are that concrete can be placed to complex shape molds under its own weight without segregation and bleeding. During casting, energy consumption, labor works and construction time are reduced since external vibration is not required. Basically, plain concrete is a brittle material that is strong in compression and weak in tension and flexure. From the light of the structural steel reinforcement contribution to the tensile strength of concrete, steel fiber usage in concrete industry has also been developed recently. Steel fiber-reinforced concrete has higher tensile and flexural enactment with admiration to plain concrete depending on the type and amount of the steel fibers. In adding to this, the role of crack width switch increases interest in using steel fibers in concrete, especially in the post-cracking phase. The use of steel fibers in the mix improves the hardened properties of self-compacting concrete in terms of its compressive strength, tensile strength, ductility, toughness, energy absorption capacity, and as well as shear resistance. So these essential properties made fiberreinforced concrete common in the research. The use of steel fiber can reduce the
Comparison of the Performance of Self Compacting Concrete
Self-Compacting Concrete Originally developed in Japan, SCC technology was made possible by the much earlier development of Superplasticisers for concrete. To compare the performance of SCC with Fly Ash 20%, Silica Fume 10%, Rice Husk Ash (5%, 10%, and 15%) as a partial replacement of cement, due to the high increase in construction which has brought a heavy demand for ingredients of concrete such as cement and sand, and these materials are becoming costly and scarce. The use of self-compacting concrete (SCC) is spreading worldwide because of its very attractive properties in the fresh state as well as after hardening. By using Super plasticizer (High Range Water Reducing Admixture) to increase the workability & admixture should bring about the required water reduction & fluidity but should also maintain the dispersing effect. The Using M40 grade of concrete with curing period of 7days, 14days and 28days.To Study the workability and mechanical properties of Self-Compacting Concrete & Compare to Conventional Self-Compacting Concrete. The laboratory testing included slump flow test, L-Box test, V-Funnel test, compressive strength test, and splitting tensile strength test.
Self-Compacting Concrete: A Review
International Journal for Research in Applied Science and Engineering Technology, 2018
This review paper includes the literature reviews related to behaviour of self compacted concrete. Concrete structure generally made without compaction but it is necessary to be compact to achieve desire strength and workability. This lead to produce self compacting concrete. To produce self compacted concrete is difficult because it is not economic and it requires producing in huge amount. The workability characteristics of SCC like filling ability, passing ability and segregation resistance are evaluated using workability tests which are slump flow-funnel and L-Box tests [1].concrete has to be vibrated highly to settle in such place where it is lot of reinforcement. There for to prevent these defects the self-compacting concrete is used [2].