Effects of Waste Steel Fibres on the Mechanical Properties of Modified Self Compacting Concrete (original) (raw)
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2020
Self-compacting concrete (SCC) is one of the innovations in concrete technology to help constructors in the casting process in hard-to-reach locations and to reduce the possibility of pores. SCC can also be green concrete by mixing it with some waste material without reducing its strength. In this study, SCC uses two types of materials, namely rice husk ash and wire fiber to produce green concrete and increase strength. Several experimental activities were carried out to examine the fresh and mechanical properties of the compacting fiber concrete itself. Fresh properties testing performed consisted of L-Box Test, V-Funnel Test and J-Ring Test. Whereas the investigation on mechanical properties was carried out by testing the compressive strength at 7, 14 and 28 days. The total sample used in this study amounted to 180 samples with a diameter of 15 cm and a height of 30 cm. Variations in this study consisted of a proportion of a mixture of rice husk ash and wire fibers in concrete. Th...
Study on Steel Fiber Reinforced Self-Compacting Concrete using Fly Ash and Rice Husk Ash
IRJET, 2022
Currently, many researches have been going on to modify and improve the concrete properties by adding different types of materials. One of them is self-compacting concrete. Self-compacting concrete is a highly flowable, deformable, non-segregating concrete that spreads and fills in the formwork under its own weight. The aim of this research is to study the steel fiber reinforced self-compacted concrete (SFRSCC) with partial replacement of cement by fly ash and rice husk ash. In the present study, cement is partially replaced by rice husk ash & fly ash. A total of 5 mixes with 0.36 W/C ratio were cast for 7-and 28-days water curing. Superplasticizer is added at the dosage of 1% by weight of binder. The percentage of steel fibers was considered as 0%, 0.5%, 1%, 1.5%, and 2% by weight of binder. Basically, the two essential properties have been studied in this investigation i.e. strength and workability. Workability tests performed were slump flow, V-funnel and L-box. Compressive and Split Tensile strength test has been studied for determining strength. Superior strength was observed at optimum dosage of steel fibers at 1.5% by weight of binder.
Buildings
This research work is devoted to the experimental investigation of both rheological and mechanical properties of self-compacting concrete (SCC) produced with waste galvanized copper wire fiber and rice husk ash (RHA). In the study, three different volume fractions of 0.5 p to 0.75 percent, 1 percent of scrap copper wire fiber as reinforcing material, and 2 percent RHA as cement replacement were used. To evaluate the fresh characteristics of SCC, the slump flow, J-ring, and V-funnel experiments were conducted for this investigation. Compressive strength, splitting tensile strength, and flexural strength of the concrete were conducted to assess the hardened properties. The test was carried out to compare each characteristic of plain SCC with this modified SCC mixture, containing RHA as pozzolanic materials and copper fiber as reinforcing material. Incorporating copper fiber in the SCC leads to a drop in fresh properties compared to plain SCC but remains within an acceptable range. On ...
IRJET, 2023
Concrete is an essential construction medium that is widely used throughout the world. Concrete is weak in tension. Several types of fibers are added to concrete in varying quantities to increase its tensile strength. The use of different synthetic fibers is common now a days. In this case we use a natural fiber. This study is to identify the effect of Sisal Fiber on concrete strength properties. Sisal Fiber is a natural fiber derived from the leaves of Sisal plant (Agava sisalana), which can be found in hot regions. Along with sisal fiber the cement is partially replaced with Rice Husk Ash (RHA) which is a waste material. The silica content available in them make it suitable supplementary cementitious material. This work aims to investigation of the use of sisal fibres and rice husk ash as partial replacement in SCC. The mix ratio is M30 and Sisal Fiber was added to concrete at 0,0.5%,1%,1.5%,2.0% by the volume of concrete and replacement of Rice Husk Ash by 5%. The specimens were subjected to tests and aimed to check the compression and tensile strength. After 7 days and 28 days of curing, the specimens' compressive and split tensile strengths were evaluated.
2022
Cement is widely known to be most expensive constituents of concrete. Therefore, the rising cost of construction materials like cement in developing countries has necessitated research into the use of alternative materials for civil engineering and building constructions. The alternative construction materials like agro-wastes etc., are used to replace cement in concrete production. In this paper, Rice Husk Ash (RHA) was used as a partial replacement of cement in Self-Compacting Concrete (SCC) to determine the influence of the RHA on the compressive and flexural strengths of the tested specimens. The percentage replacements were 0%, 5%, 10%, 15% and 20% of the RHA in the corresponding concrete mixes. Concrete cubes and prisms were cast, cured and their mechanical properties (compressive and flexural strengths) were evaluated at 7, 14, 21 and 28 days. The results show that remarkable strengths values of compressive and flexural strengths were manifested, when compared with the contro...
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.
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
A Study on Effect of Steel Fiber in Fly Ash Based Self-Compacting Concrete
Concrete is a versatile widely used construction material. Ever since concrete has been accepted as a material for construction, researchers have been trying to improve its quality and enhance its performance. Recent changes in construction industry demand improved durability of structures. There is a methodological shift in the concrete design from a strength based concept to a performance based design. At present there is a large emphasis on performance aspect of concrete. One such thought has lead to the development of Self Compacting Concrete (SCC). It is considered as " the most revolutionary development in concrete construction ". SCC is a new kind of High Performance Concrete (HPC) with excellent deformability and segregation resistance. It can flow through and fill the gaps of reinforcement and corners of moulds without any need for vibration and compaction during the placing process. The features of mix proportion of SCC include low water to cementitious material ratio, high volume of powder, high paste to aggregate ratio and less amount of coarse aggregate. One of the popularly employed techniques to produce Self Compacting Concrete is to use fine materials like Fly Ash, GGBFS etc; in concrete, besides cement, the idea being to increase powder content or fines in concrete. The original contribution in the field of SCC is attributed to the pioneering work of Nan Su etal; who have developed a simple mix design methodology for Self-Compacting Concrete. In this method, the amount of aggregate required is determined first, based on Packing Factor (PF). This will ensure that the concrete obtained has good flowability, self-compacting ability and other desired SCC properties. The European Federation of Producers and Applicators of Specialist Products for Structures (EFNARC) [2005] have also laid down certain guidelines for fresh properties of SCC. The present investigation is aimed at developing high strength Self Compacting Concrete of M55 and M65 Grades. SCC characteristics such as flowability, passing ability and segregation resistance have been verified using slump flow, L box and V funnel tests.
Influence of Natural Fibers on the Fresh and Hardened Properties of Self-Compacting Concrete (SCC)
2018
The main purpose of the study is to explore the effect of the plant fibers having different volume fraction on the fresh properties of the mix design of SCC such as filling ability, passing ability and segregation resistance as well as its influence on the compressive strength of the hardened SCC. The study started by conducting preliminary test on the aggregates needed in the construction of SCC. The aggregates were mixed together until uniform consistency was attained. Different volume fractions of CN and RS fibers were added on the mix design and molded in a cylindrical molder. The concrete were dried for 48 hours then placed in curing tank. Filling ability were tested by means of slump flow and T500 test. Passing ability were tested using J-ring while segregation resistance were tested using Vfunnel and T5min. Hardened SCC with plant fibers were tested for its compressive strength. Based from the collected data, the filling ability were significantly affected by decreasing the s...
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%...