Proportions Of Steel Fibres Research Articles

USE OF STEEL FIBER AND COPPER SLAG IN CONCRETE PAVEMENT

This study explores the utilization of steel fiber as a reinforcement material in concrete pavement construction. The investigation delves into the mechanical and structural properties of steel fiber-reinforced concrete (SFRC) and its impact on the performance of pavement structures. Various proportions of steel fibers are incorporated into the concrete mix, and the resulting mixtures are subjected to comprehensive testing, including compressive strength, flexural strength, and fatigue resistance. The study aims to assess the potential enhancement in the durability and load-bearing capacity of concrete pavements through the incorporation of steel fibers. The findings indicate that the addition of steel fibers contributes to increased tensile strength and crack resistance, addressing common issues such as reflective cracking and fatigue failure in concrete pavements. Moreover, the study investigates the economic viability and sustainability aspects associated with the use of steel fiber in concrete pavements, considering its influence on lifecycle costs and environmental impact. The outcomes provide valuable insights for engineers and practitioners seeking optimized solutions for durable and resilient concrete pavement construction. Keywords: Steel fibers, Concrete pavement, Reinforcement, Mechanical Properties, Durability,Structural Performance, Compressive strength, Flexural Strength,Fatigue resistance, Reflective Cracking,Sustainability.

Experimental study on steel fiber reinforced self-compacting concrete

The aim of this research is to produce high-strength Self-Compacting Concrete (SCC) by using industrial wastes such as GGBFS and fly ash as partial replacements for cement. Additionally, the research aims to investigate how the proportions of steel fibers should be selected to produce Steel Fiber Reinforced Self-Compacting Concrete (SFRSCC) mixes with the appropriate flow ability, passing capability, and segregation resistivity. To produce self-compacting concrete, GGBFS and fly ash are used as partial replacements for cement in proportions of 5%, 10%, 15%, 20%, 25%, and 30% by weight of cement. Furthermore, the impact of steel fibers on the characteristics of SCC is analyzed by utilizing steel fibers in different proportions ranging from 0.5%, 1.0%, 1.5%, and 2%. The research methods used to determine the concrete workability include the slump flow test and L-box test.

Cyclic Response of Steel Fiber Reinforced Normal Strength Concrete Exterior Beam-Column Joint Under Reversed Cyclic Load

Failure investigation studies on a large number of buildings exposed to earthquake loads revealed that Beam-Column Joint (BCJ) is the most critical structural regions in any moment resisting RC structure. The structural response of RC moment resting frame system under the earthquake loads mainly depends on the behavior and performance of the BCJ. It should be designed and detailed properly to ensure safety and serviceability of the structure under various earthquake loads. In the present Experimental work, Normal Strength Concrete (NSC) Fiber Reinforced Beam-Column Joint specimens are cast and are subjected to Cyclic loading. Proportions of steel fibers used are 0%, 0.5% and 1%. Load response curves have been plotted to demonstrate change in the Energy absorption, Stiffness Degradation and Ductility factors.

Effect of Alccofine on the Properties of Concrete Incorporating Steel Fibers

This paper deals with the investigation of concrete containing varying replacement percentages of Alccofine and conjointly Alccofine and different proportions of steel fibers with aspect ratio 50 to investigate mechanical and morphological properties. The replacement levels of Alccofine was chosen as 5% to 15% with 5% increment and steel fibers of 0.5% to1.5% with an increment of 0.5% by volume of concrete. Mix design was done by using British D.O.E method, fixing water binder ratio as 0.45. Results indicated that concrete replaced with Alccofine in addition of steel fibers increased the compressive and flexural strength of concrete. The maximum strength was obtained for the concrete mix containing 15% Alccofine and 1.5% circular crimped steel fibers. Morphological studies indicated the excess C-S-H gel for concrete mixes containing Alccofine as compared to conventional concrete. Hence, it can be culminated that Alccofine and addition of steel fibers increases the strength properties and crack resistant strength of concrete.

Fatigue performance of self-compacting concrete containing hybrid steel–polypropylene fibres

This study presents the flexural fatigue analysis of hybrid fibre-reinforced self-compacting concrete (HyFRSCC) in which design fatigue lives of HyFRSCC containing various combinations of steel fibres (SF) and polypropylene fibres (PPF) have been estimated. The proportions of SF and PPF were kept as 100PPF, 75PPF–25SF, 50PPF–50SF, 25PPF–75SF and 100SF. The total fibre volume fraction was taken as 1%. The calculated values of Weibull parameters were used to estimate the mean and design fatigue lives of HyFRSCC. The HyFRSCC mix 100PPF has lesser variability in the fatigue life data, whereas HyFRSCC mix having 25PPF–75SF has been found to exhibit higher fatigue lives as compared to other fibre mix proportions.

Mechanical Properties of Cocktail Fibre Reinforced High Performance Concrete using Silica Fume

This paper describes the experimental studies on mechanical properties of steel fibre reinforced concrete using three types of steel fibres of different length and geometry. To produce high performance concrete different types and proportions of steel fibres are used. Two types of long hooked steel fibres and one type of short crimped steel fibre with length/aspect ratio of 30/60, 60/80 and 15/33 were utilized. These fibres are added by 1% by volume of concrete. Silica is used as a partial replacement of cement @ 8% by the weight of cement. Addition of 1% of super plasticizer allows the reduction of water cement ratio without affecting the workability of mixture. M30 grade concrete has been designed as per the codal provisions of IS 10262-2009. Water cement ratio was 0.40. Conventional concrete is compared with fibre reinforced concrete based on compressive strength of cube and split tensile strength of Cylinder and flexural strength of prism. The results showed significant improvement in the strengths of the cocktail fibre reinforced concrete due to the inclusion of micro fibre, macro fibre and silica fume.

Influence of Steel Fibers on the Behavior of Light Weight Concrete Made from Crushed Clay Bricks

The purpose of this study is to investigate the effects of steel fibers on some properties of light weight concrete. The coarse aggregate used in this study made from crushed clay bricks. Four proportions of steel fibers are used (0.25%, 0.5%, 0.75%, and 1%) by volume of concrete, in addition, to reference mix (without steel fibers). The density obtained from experimental work was 1812 Kg/m³. The results showed that, in general, the adding of steel fibers led to increase the compressive strength of light weight concrete. The enhancement in compressive strength was about (17%-43%) at 7 days and (21%-51%) at 28 days as compared with reference mix. Also, it is deduced that, the proportion (0.75%) of steel fibers is the optimum one. On the other hand, splitting tensile strength increased by about 62.62%, 33.76%, 17.27% and 5.93% for light weight concrete with 1%, 0.75%, 0.5% and 0.25% steel fibers by volume of concrete respectively. Furthermore, flexural strength improved by about 54.24%, 41.67%, 29.25% and 20.91% for light weight concrete with 1%, 0.75%, 0.5% and 0.25% steel fiber by volume of concrete respectively. Finally, the results indicated that, there are significant increases in static modulus of elasticity and absorption for mixes which have steel fibers as compared with others without steel fibers.

Flexural fatigue strength of hybrid fibrous concrete beams

The paper presents a study on the flexural fatigue strength of hybrid fibre-reinforced concrete (HyFRC) containing different proportions of steel and polypropylene fibres. An experimental programme was conducted to obtain the fatigue lives of HyFRC specimens at different stress levels in which approximately 113 flexural fatigue tests were conducted. Approximately 60 complimentary static flexural tests were executed for reference purpose. The specimen incorporated different proportions of steel fibres and polypropylene fibres in the ratio of 25–75%, 50–50% and 75–25% by volume. The total fibre content was kept at 1·0% by volume. The test data was used to estimate the coefficients of the fatigue equations representing S–N diagrams. The fatigue test data has also been employed to determine a relationship between fatigue stress level S, fatigue life N and probability of failure Pf, and to generate a family of S–N–Pf curves for HyFRC. The experimental coefficients of the fatigue equation were also obtained from the fatigue test data to represent the S–N–Pf curves analytically.