MECHANICAL AND SHRINKAGE PROPERTIES OF HYBRID STEEL AND POLYPROPYLENE FIBRE REINFORCED CONCRETE COMPOSITE

2016 ◽  
Vol 78 (9) ◽  
Author(s):  
Wan Amizah Wan Jusoh ◽  
Izni Syahrizal Ibrahim ◽  
Abdul Rahman Mohd Sam ◽  
Noor Nabilah Sarbini
Keyword(s):  
Mechanical Properties ◽  
Reinforced Concrete ◽  
Volume Fraction ◽  
Concrete Strength ◽  
Shrinkage Strain ◽  
Single Type ◽  
Fibre Reinforced Concrete ◽  
Normal Concrete ◽  
Concrete Control ◽  
Type Fibre

An experimental study had been carried out to investigate the mechanical properties, expansion and shrinkage of fibre reinforced concrete composite (FRC). However, instead of using single type fibre of either steel (SF) or polypropylene (PPF), this study also combined the two types in one mix.The mechanical properties investigated in this study include compressive strength, splitting tensile strength and flexural strength. Three different FRC mix proportions and one normal concrete (control) were casted which includes (a) 75% SF, (b) 75% SF + 25% PPF, (c) 25% PPF, and (d) 0% fibre for control (PC). Meanwhile, the volume fraction, Vf for the FRC was fixed at 1.5% and the concrete strength was designed to achieve grade C60 at 28 days. The results show that the use of fibres in concrete decreased the workability of concrete. In addition, concrete mix with both SF and PPF produced the highest splitting tensile and flexural strengths by an increase of 75.9% and 86.5%, respectively as compared with the control. Furthermore, expansion and shrinkage of FRC was found to be less than the control. It can be concluded that the combined SF and PPF in concrete gives the most appropriate combination as regards to the highest flexural and splitting tensile strengths, and also reduced the shrinkage strain.

scholarly journals Comparison of Mechanical Properties of Normal and Fibre Reinforced Concrete (Grade M15)

2019 ◽  
Vol 5 ◽  
pp. 153-164
Author(s):  
Sagar Bista ◽  
Sagar Airee ◽  
Shikshya Dhital ◽  
Srijan Poudel ◽  
Sujan Neupane
Keyword(s):  
Mechanical Properties ◽  
Reinforced Concrete ◽  
Steel Fibre ◽  
Residential Buildings ◽  
Fibre Reinforced Concrete ◽  
Cement Concrete ◽  
Normal Concrete ◽  
Steel Fibre Reinforced Concrete ◽  
Cracking Control ◽  
Different Types

Concrete is weak in tension, hence some measures must be adopted to overcome this deficiency as well as to enhance physical and other mechanical properties but in more convenient and economical method. Through many research from the past, it has been observed that addition of different types of fibres has been more effective for this purpose. This report presents the work undertaken to study the effect of steel and hay fibre on normal cement concrete of M-15 Grade on the basis of its mechanical properties which include compressive and tensile strength test and slump test as well. Although hay fibres are abundantly available in Nepal, no research have been popularly conducted here regarding the use of hay fibres in concrete and the changes brought by it on concrete’s mechanical properties. Experiments were conducted on concrete cubes and cylinders of standard sizes with addition of various percentages of steel and hay fibres i.e. 0.5%, 1% and 1.5% by weight of cement and results were compared with those of normal cement concrete of M-15 Grade. For each percentage of steel and hay fibre added in concrete, six cubes and six cylinders were tested for their respective mechanical properties at curing periods of 14 and 28 days. The results obtained show us that the optimum content of fibre to be added to M-15 grade of concrete is 0.5% steel fibre for compression and 0.5% hay fibre content for tension by weight of cement. Also, addition of steel and hay fibres enhanced the binding properties, micro cracking control and imparted ductility. In addition to this, two residential buildings were modeled in SAP software, one with normal concrete and other with concrete containing 0.5% steel fibre. Difference in reinforcement requirements in each building was computed from SAP analysis and it was found that 489.736 Kg of reinforcement could be substituted by 158.036 kg of steel fibres and decrease in materials cost of building with 0.5% steel fibre reinforced concrete was found to be Rs. 32,100.

scholarly journals A Researchon Influence of Admixtureson Mechanical Properties of Fibre Reinforced Concrete

2019 ◽  
Vol 8 (6S4) ◽  
pp. 269-270
Keyword(s):  
Mechanical Properties ◽  
Reinforced Concrete ◽  
Flexural Strength ◽  
Experimental Work ◽  
Natural Fiber ◽  
Fiber Reinforced Concrete ◽  
Coir Fiber ◽  
Fibre Reinforced Concrete ◽  
Normal Concrete ◽  
Cement Material

In this paper presents the mechanical properties of the fiber reinforced concrete. For that the experimental work should be done by using natural fiber that is coir ond it should be done on by using M5O grade of concrete. In this project we are going to use the admixtures also at different percentages by the replacement of the cement material. By adding the admixtures the characteristic strength of the concrete also improved when compared to the normal concrete. The mechanical properties like the compression strength , flexural strength, density and ductility of theconcrete be calculated .in this experimental work the coir fiber was added up to the 0.4% of the binder volume of the concrete mixture. In this work the admixtures like flyash and silica fumealso mixed at 10% and 20% respectively. By using this experimental work ,ductility ,modulus of elasticity and ultra pulse value ofreinforced concrete also determined

scholarly journals Mechanical Properties of High-Performance Hybrid Fibre-Reinforced Concrete at Elevated Temperatures

2021 ◽  
Vol 13 (23) ◽  
pp. 13392
Author(s):  
Moawiah Mubarak ◽  
Raizal Saifulnaaz Muhammad Rashid ◽  
Mugahed Amran ◽  
Roman Fediuk ◽  
Nikolai Vatin ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Reinforced Concrete ◽  
High Performance ◽  
Elevated Temperatures ◽  
High Performance Concrete ◽  
Concrete Strength ◽  
Fibre Reinforced Concrete ◽  
Explosive Spalling ◽  
Hybrid Fibre ◽  
Before And After

Deterioration of concrete’s integrity under elevated temperature requires an alteration in its composition to have better thermal stability. Fibre-reinforced concrete has shown significant improvements in concrete strength and this paper aimed to investigate the influence of steel (ST) and polypropylene (PP) fibres on the behaviour of high-performance concrete (HPC) exposed to elevated temperatures. Six mixtures were prepared and cast by adding one or two types of polypropylene fibre (54 and 9 mm) at 0.25 or 0.5% and either singly or in a hybrid combination, along with a fixed volumetric content at 1% of five-dimensional hooked steel (5DH) fibres. At the age of 28 days, samples were heated to the targeted temperature of 800 °C and cooled down naturally to the laboratory temperature. Visual inspection, flexural, split tensile and compressive strengths were examined before and after the exposure to elevated temperatures. Results exhibited that the hybridization of long and short PP fibres, along with the ST fibres, has notably improved all residual mechanical properties of HPC and kept the integrity of concrete after exposure to elevated temperatures. In addition, PP fibres can significantly prevent spalling, but ST fibres were ineffective in mitigating explosive spalling in beams specimens.

scholarly journals Influence of Hybrid Fibre on the Mechanical Properties of Concrete

2019 ◽  
Vol 9 (1) ◽  
pp. 2637-2641
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Compressive Strength ◽  
Reinforced Concrete ◽  
Volume Fraction ◽  
Plain Concrete ◽  
Strength Test ◽  
Fibre Reinforced Concrete ◽  
Split Tensile Strength ◽  
Hybrid Fibre

This study presents the experimental investigation carried out to study the mechanical properties of concrete with and without the addition of fibres to it.d Concrete is the most consumed material in the world which has the property of strong in compression and weak in tension. Also plain concrete possess very limited ductility and little resistance to cracking. Hence fibres are introduced in the concrete to improve the tensile strength & brittleness of the concrete. These fibres which are closely spaced and dispersed uniformly in the concrete arrest the micro and macro cracks and improve the tensile strength of concrete. Concrete admixed with such fibres are known as Fibre Reinforced Concrete. The combination of two (or) more fibres called as Hybridization is carried out in this work. M25 grade concrete is designed as per IS 10262:2009 with the volume fraction of 0-1.5%. The workability of the concrete is affected due to the addition of fibres and hence super plasticizers are added to the concrete. The fibres considered for the study are (i) Crimped Steel Fibre (0-1.5%) and (ii) Shortcut Glass Fibre (0.1-0.2%). The behaviour of the hybrid fibre reinforced concrete is investigated by conducting compressive strength test on cube specimen of size 150mmx150mmx150mm and split tensile strength test on cylinder specimen of size 150mm diameter and 300mm height. From the experimental results, the optimum fibre combinations for maximum compressive strength and spilt tensile strength of concrete are identified.

scholarly journals The effect of macro polymer fibres length and content on the fibre reinforced concrete

2018 ◽  
Vol 219 ◽  
pp. 03004 ◽  
Author(s):  
Aleksandra Mariak ◽  
Marzena Kurpińska
Keyword(s):  
Tensile Strength ◽  
Reinforced Concrete ◽  
Volume Fraction ◽  
Concrete Strength ◽  
Fibre Volume Fraction ◽  
Fibre Length ◽  
Fibre Volume ◽  
Concrete Mixture ◽  
Fibre Reinforced Concrete ◽  
Flexural Tensile Strength

The paper presents studies of a ready-mix concrete containing polymer fibres of three different lengths: 24, 38 and 54 mm. The performed tests allowed to determine the effect of fibre volume fraction and length on the concrete strength. The basic parameters of concrete mixture (consistency, air content and bulk density) were identified. Fibre reinforced concrete belongs to a group of composite materials. The polymer fibres are applied in the concrete in structures where the reduction of shrinkage cracking as well as corrosion resistance and fire temperatures are required. It is widely known, that the cracking behaviour of concrete structures depends on flexural tensile strength of concrete. The addition of fibres significantly improves the tensile strength. The experimental study, including axial compressive strength and center-point loading flexural tensile strength, was carried out. The scope of the research was also expanded by the usage of a scanning microscope. The test results showed the effect of fibre length and fibre combinations on mechanical properties of concrete. The effect of the research is to formulate guidelines due to the quantity of macro polymer fibres. In general, appropriate fibre content brings a beneficial effect e.g. improves better workability of a concrete mixture.

scholarly journals Influence of Admixtures on Mechanical Properties of Fibre Reinforced Concrete

2019 ◽  
Vol 8 (6S4) ◽  
pp. 257-259
Keyword(s):  
Mechanical Properties ◽  
Reinforced Concrete ◽  
Flexural Strength ◽  
Experimental Work ◽  
Natural Fiber ◽  
Fiber Reinforced Concrete ◽  
Coir Fiber ◽  
Fibre Reinforced Concrete ◽  
Normal Concrete ◽  
Cement Material

In this paper presents the mechanical properties of the fiber reinforced concrete. For that the experimental work should be done by using natural fiber that is coir ond it should be done on by using M5O grade of concrete. In this project we are going to use the admixtures also at different percentages by the replacement of the cement material. By adding the admixtures the characteristic strength of the concrete also improved when compared to the normal concrete. The mechanical properties like the compression strength , flexural strength, density and ductility of theconcrete be calculated .in this experimental work the coir fiber was added up to the 0.4% of the binder volume of the concrete mixture. In this work the admixtures like flyash and silica fumealso mixed at 10% and 20% respectively. By using this experimental work ,ductility ,modulus of elasticity and ultra pulse value ofreinforced concrete also determined.

Experiment Study on Mechanics and Pore Structure of Steel Fibre Reinforced Concrete

2010 ◽  
Vol 150-151 ◽  
pp. 825-828
Author(s):  
Yan Wang ◽  
Di Tao Niu ◽  
Yuan Yao Miao ◽  
Nai Qi Jiao
Keyword(s):  
Mechanical Properties ◽  
Experimental Study ◽  
Reinforced Concrete ◽  
Pore Structure ◽  
Steel Fibre ◽  
Fibre Reinforced Concrete ◽  
Experiment Study ◽  
Steel Fibre Reinforced Concrete ◽  
Mercury Intrusion ◽  
Strength And Durability

The concrete microstructure can affect its macroscopic properties, such as the strength and durability, etc. Based on the experimental study of cube compressive strength of steel fibre reinforced concrete, splitting tensile strength, flexural strength, and using by mercury intrusion method to test the pore structure of steel fibrous, this paper analyzes the influence of fibre on concrete pore structure. And then on mechanical properties of concrete from microcosmic perspective.

scholarly journals The Mechanical Properties of Steel-Polypropylene Fibre Composites Concrete (HyFRCC)

2015 ◽  
Vol 773-774 ◽  
pp. 949-953 ◽  
Author(s):  
Izni Syahrizal Ibrahim ◽  
Wan Amizah Wan Jusoh ◽  
Abdul Rahman Mohd Sam ◽  
Nur Ain Mustapa ◽  
Sk Muiz Sk Abdul Razak
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Compressive Strength ◽  
Flexural Strength ◽  
Volume Fraction ◽  
Concrete Strength ◽  
Fibre Volume Fraction ◽  
Fibre Volume ◽  
Polypropylene Fibre ◽  
Experimental Results

This paper discusses the experimental results on the mechanical properties of hybrid fibre reinforced composite concrete (HyFRCC) containing different proportions of steel fibre (SF) and polypropylene fibre (PPF). The mechanical properties include compressive strength, tensile strength, and flexural strength. SF is known to enhance the flexural and tensile strengths, and at the same time is able to resist the formation of macro cracking. Meanwhile, PPF contributes to the tensile strain capacity and compressive strength, and also delay the formation of micro cracks. Hooked-end deformed type SF fibre with 60 mm length and fibrillated virgin type PPF fibre with 19 mm length are used in this study. Meanwhile, the concrete strength is maintained for grade C30. The percentage proportion of SF-PPF fibres are varied in the range of 100-0%, 75-25%, 50-50%, 25-75% and 0-100% of which the total fibre volume fraction (Vf) is fixed at 0.5%. The experimental results reveal that the percentage proportion of SF-PPF fibres with 75-25% produced the maximum performance of flexural strength, tensile strength and flexural toughness. Meanwhile, the percentage proportion of SF-PPF fibres with 100-0% contributes to the improvement of the compressive strength compared to that of plain concrete.

scholarly journals Flexural Behavior of Reinforced Concrete Beams Reinforced with 3D-Textile Composite Fiber

2020 ◽  
Vol 26 (7) ◽  
pp. 127-144
Author(s):  
Mays R. Abdulghani ◽  
Dr. Ahmed S. Ali
Keyword(s):  
Mechanical Properties ◽  
Reinforced Concrete ◽  
Steel Fiber ◽  
Volume Fraction ◽  
Main Idea ◽  
Composite Fiber ◽  
Reinforced Concrete Beams ◽  
Flexural Behavior ◽  
Textile Fiber ◽  
Textile Composite

Normal concrete is weak against tensile strength, has low ductility, and also insignificant resistance to cracking. The addition of diverse types of fibers at specific proportions can enhance the mechanical properties as well as the durability of concrete. Discrete fiber commonly used, has many disadvantages such as balling the fiber, randomly distribution, and limitation of the Vf ratio used. Based on this vision, a new technic was discovered enhancing concrete by textile-fiber to avoid all the problems mentioned above. The main idea of this paper is the investigation of the mechanical properties of SCC, and SCM that cast with 3D AR-glass fabric having two different thicknesses (6, 10 mm), and different layers (1,2 layers). As well as micro-steel fiber with 1.25% volume fraction was used. Sixteen rectangular reinforced concrete beam specimens have been tested to study the behavior of their flexural strength. The results concluded that utilizing 3D-TFs with mortar mixture gave significantly higher enhancement for the load-carrying capacity than the concrete mixture. The utilization of 3D-TFs and micro-steel fiber together in the SCM mix gave better results. The stiffness of the specimens was improved with increasing the thickness and the number of textile fiber layers.

scholarly journals DUCTILITY RESPONSE OF HYBRID FIBRE REINFORCED CONCRETE BEAMS

2018 ◽  
pp. 174-179 ◽  
Author(s):  
Eswari Natarajan
Keyword(s):  
Reinforced Concrete ◽  
Ultimate Load ◽  
Concrete Beams ◽  
Volume Fraction ◽  
Fibre Volume ◽  
Reinforced Concrete Beams ◽  
Fibre Reinforced Concrete ◽  
Hybrid Fibre ◽  
Service Load ◽  
Strength And Ductility

Abstract: The effect of fibre content on the Strength and ductility behaviour of hybrid fibre reinforced concrete (HFRC) beams having different fibre volume fractions was investigated. The parameters of this investigation included service load, ultimate load, service load deflection, ultimate load deflection, crack width, deflection ductility and energy ductility. The fibre volume fraction (Vf) ranged from 0.0 to 2.0 percent. Steel and polyolefin fibres were combined in different proportions and their impact on the above parameters was studied. The ductile response of hybrid fibre reinforced concrete beams was compared with that of control beam. The test results show that addition of 2.0 percent by volume of hybrid fibres improve the strength and ductility appreciably. Empirical expressions for predicting the strength and ductility of hybrid fibre reinforced concrete (HFRC) are proposed based on regression analysis. A close agreement has been obtained between the predicted and experimental results.

Sign in / Sign up

Export Citation Format

Share Document