investigated to evaluate the effect of glass fibers improving the properties of concrete. At 1% addition of glass fiber,. 10% silica fume with water cement ratio 0.50 ...
International Journal of Emerging Technology and Advanced Engineering
Website: www.ijetae.com (ISSN 2250-2459, ISO 9001:2008 Certified Journal, Volume 7, Issue 5, May 2017)
An Experimental Study on Silica Fume Concrete with Addition of Glass Fiber Harish B A1, Chetan K N2, Kotresh D N3, Mamatha M M4, Nishath Anjum M5, Sumanjali6 Assistant Professor, G M Institute of Technology, Davanagere-577006, Karnataka, India 2,3,4,5,6 UG Student, G M Institute of Technology, Davanagere-577006, Karnataka, India
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Abstract: - The experiment work carried out by silica fume as a supplementary material for cement and evaluates cement for M20 grade of concrete. We are adding 0%, 5%, 10%, and 15% by weight of cement in concrete and also added glass fiber. The aim of investigation is study the possibilities to use glass fiber in addition to other constituents of concrete and strength properties. The influence of 0%, 0.5% 1%, and 1.5% fiber content by mass of cement and aspect ratio 857, fiber cut length 12mm is investigated to evaluate the effect of glass fibers improving the properties of concrete. At 1% addition of glass fiber, 10% silica fume with water cement ratio 0.50 the compressive strength test and split tensile strength gives best result in concrete. To validate the experimental results finite element analysis is carried out by using ANSYS 11 software.
II. OBJECTIVES OF THE S TUDY The following are the main objectives of the study 1) To determine the fresh properties of concrete by slump test and compaction factor test. 2) To evaluate the compressive strength of control concrete of grade M20 and silica fume concrete produced by replacing cement in 0%, 5%, 10% and 15% with addition of glass fiber in 0%, 0.5%, 1% and 1.5% by weight of cement. 3) To evaluate the split tensile strength of control concrete of grade M20 and silica fume concrete
Keywords: - Glass Fiber (GF), Silica fume (SF), Aspect Ratio, Compressive Strength (CS), Split Tensile Strength (SPT), ANSYS.
produced by replacing cement in 0%, 5%, 10% and 15% with addition of glass fiber in 0%, 0.5%, 1% and
I. INTRODUCTION
1.5% by weight of cement.
In the world, concrete is most widely used construction material they are made in any form and shape. The strength and durability of concrete can be changed by making appropriate changes in its ingredient like cementation material, aggregate and water and by adding some special ingredient like silica fume and Glass fiber. They are produced better strength in concrete. The presence of micro cracks in the mortar aggregate produce weakness in concrete they can be removed by inclusion of silica fume with Glass fiber. They are composite material can be introduced into it resist crack growth. The Glass fiber are resist the axial compressive force in the cube form so they produce better compressive strength in concrete Silica fume is known to produce a high strength concrete and is used in two different ways as a cement replacement, in order to reduce the cement content (usually for economic reasons) and as an additive to improve concrete properties (in both fresh and hardened states).in general, the character and performance of fiber concrete changes with varying concrete formulation as well as the fiber material type.
4) To carry out ANSYS analysis and comparing it with experimental results. III. STATE O F ART 3.1 “An experimental investigation on glass fiber reinforced high performance concrete with silica fume as admixture”. By Vaishali Ghorpade. High performance concrete (HPC) has been used in various structures all over the world since last two decades. Recently a few infrastructure projects have also seen specific application of high-performance concrete. The development of high performance concrete (HPC) has brought about the essential need for additives both chemical and mineral to improve the performance of concrete. Most of the developments across the work have been supported by continuous improvement of these admixtures. Hence variety of admixtures such as fly ash, rice husk ash, stone dust have been used so for. Also different varieties of fibers have below tried as additions. Hence, an attempt has been made in the present investigation to study the behavior of Glass fibers in High Performance Concrete. To attain the set out objectives of the present investigation, an aggregate binder ratio of 2.0
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International Journal of Emerging Technology and Advanced Engineering
Website: www.ijetae.com (ISSN 2250-2459, ISO 9001:2008 Certified Journal, Volume 7, Issue 5, May 2017) has been chosen and cement has been replaced partially with Silica fume in four different percentages viz. 0, 10, 20 and 30%. Glass fibers by 0, 0.5, 1.0, and 1.5 % to produce High Performance Concrete. Hardened Glass fiber Reinforced High Performance Concrete (GFRHPC) is tested for Compression, split tension and flexural strengths. This investigation concluded that 10% of silica fume and 1.0% of glass fiber volume which can be used for giving maximum possible compressive strength and split tensile strength at any age for glass fiber reinforced high performance concrete.
percentage 5, 10, 15 and 20% of silica fume as a partial replacement of cement. From the study concluded that compressive strength and split tensile strength of concrete is increased by the use of silica fume up to 10% replacement of cement. From 10% there is a decrease in compressive strength and split tensile strength. The compressive strength mainly depends on the percentage of silica fume because of its high pozzolanic nature to form more densely packed C-S-H gel. The split tensile strength increases mainly due to improvement in packing, i.e., action of it as a filler material.
3.2 “Study of compressive strength of concrete with glass fiber and silica fume”. By Akash kumar patel and Dr.Rajiv chandak. In the world, concrete is most widely used construction material they are made in any form and shape. The strength and durability of concrete can be changed by making appropriate changes in its ingredient like cementation material, aggregate and water and by adding some special ingredient like silica fume and Glass fiber. They are produced better strength in concrete. The presence of micro cracks in the mortar aggregate produce weakness in concrete they can be removed by inclusion of silica fume with Glass fiber. They are composite material can be introduced into its resist crack growth. The aim of this paper is to study the behavior of M-35 grade of concrete to determine the compressive strength by partially replacement of cement by mineral admixture such as silica fume and also added Glass fiber. Cement was partially replaced by silica fume in 10% by weight of cement and glass fibers in 1%, 2%, and 3% .The tests were performed according to Bureau of Indian standards. The results thus obtained were compared and examined with respect to the control specimen. It was found that addition of glass fiber in concrete they give variation in strength. From the study they concluded that compressive strength reduces when cement replaced by silica fume. As silica fume percentage increases compressive strength and split tensile strength decreases. It has been observed that the increase in compressive strength for M-35 grade of concrete at 7 and 28 days are observed to be more at 1%. We can likewise utilize the waste product of glass as fiber.
3.4 “Glass Fiber Reinforced Concrete Use in Construction”. By Pshtiwan N. Shakor, and S. S. Pimplikar. In this study trial tests for concrete with glass fiber and without glass fiber are conducted to indicate the differences in compressive strength and flexural strength by using cubes of varying sizes. Various applications of GFRC shown in the study, the experimental test results, techno-economic comparison with other types, as well as the financial calculations presented, indicate the tremendous potential of GFRC as an alternative construction material. Glass fiber Reinforced Concrete offers many advantages, such as being lightweight, fire resistance, good appearance and strength. The glass fibers are used in this experiment 0, 0.11, 1.5 and 2.0% by weight of cement. From this study concluded that average compressive strength of concrete is maximum, when 1.5% of glass fiber is used. And 2% of glass fiber gave a maximum flexural strength of concrete, which is 10% more than that obtained at 1.5% 3.5 “An experimental study on glass fiber reinforced concrete”. By S.Hemalatha, Dr.A.Leema Rose. The study work is focused on strength and durability characteristics of Glass fiber reinforced concrete. As per IS:10262-2009 designed by M40 grade of Concrete and conplats as a super plasticizer and water cement ratio 0.40. The performance of Cement Concrete with varying percentage of Glass Fiber adding like 0.33%, 0.66%, 1%, 1.33%, 1.66%, 2%. The strength and durability properties of Glass Fiber Reinforced Concrete compared to Control Concrete. Based on experimental investigation addition of Glass Fiber in plain concrete increases the strength and durability characteristics. From this study concluded that initially addition of Glass Fiber in the plain concrete the strength characteristics like compressive, flexural and split tensile strength is gradually increased. Finally certain percent addition of Glass Fiber attain that gradually decrease in strength. Maximum compressive, flexural and split tensile strength is attaining in 1.0% addition of Glass Fiber.
3.3 “The Mechanical Properties of Concrete Incorporating Silica Fume as Partial Replacement of Cement”. By Hanumesh B M, B K Varun, Harish B A. In this paper their study an attempt has been made to use silica fume as a supplementary material for cement and to evaluate the limit of replacement of cement for M20 grade concrete. The main aim of this work is to study the mechanical properties of M20 grade control concrete and silica fume concrete with different
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International Journal of Emerging Technology and Advanced Engineering
Website: www.ijetae.com (ISSN 2250-2459, ISO 9001:2008 Certified Journal, Volume 7, Issue 5, May 2017) So adding Glass Fiber up to 1.0% only not exceeds the limit. The durability characteristics gradually increased based on the addition of Glass Fiber.
Silica fume:- Silica fume is a byproduct of producing silicon metal or ferrosilicon alloys. Concrete containing silica fume can have very high strength and can be very durable. Silica fume is purchased from Sai Durgha Enterprises, Bangalore. Glass fiber:- Glass fiber is a material consisting of numerous extremely fine fibers of glass. Glass fibre is brought from Disha Enterprises, Bangalore.
IV. MATERIALS Cement:- In this present work Ultratech cement of 43 grade ordinary Portland cement was used for casting cubes and cylinder for all concrete mixes. The cement is uniform colour and free from any hard lumps. The various testes conducted on cement are standard consistency, initial and final setting time, specific gravity, fineness and compressive strength.
Table 4:Details of Glass fiber
Table 1:Physical properties of cement
Experimental Results 3.15 2.1%
IS Limits Particulars (IS:8112-1989) Specific Gravity Fineness 320kg/m^3 Hence O.K Step 5:- Proportion of volume of coarse aggregate and fine aggregate content Referring IS:10262-2009,Table-3, Volume of coarse aggregate corresponding to 20mm size aggregate and fine aggregate (Zone II) for W/C ratio of 0.5 is 0.62. Therefore the corrected proportion of volume of coarse aggregate for W/C of 0.50 = 0.62 Therefore, volume of coarse aggregate=0.62 m^3 Volume of fine aggregate=1-0.62=0.38 m^3 Step 6:-Mix Calculation a) Concrete volume = 1m^3 b) Cement volume = cement weight / cement of specific gravity = [394/3.15]*[1/1000] Vc = 0.125 m^3 c) Vol of water = weight of water content / specific gravity of water = [197/1]*[1/1000] Vw = 0.197 m^3 d) All aggregate in Vol = [a-(b+c)] = [1-(0.125+0.197] Va = 0.678 m^3 e) Mass of coarse aggregate = d*volume of CA*Specific gravity of coarse aggregate*1000 = [0.678 * 0.62 * 2.64 *1000] Vca =1109.75kg /m^3 f) Mass of fine aggregate = d*volume of FA*Specific gravity of fine aggregate*1000 = [0.678 * 0.380 * 2.69 * 1000] Vfa = 693.04 kg /m^3
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International Journal of Emerging Technology and Advanced Engineering
Website: www.ijetae.com (ISSN 2250-2459, ISO 9001:2008 Certified Journal, Volume 7, Issue 5, May 2017) Table 13: Slump cone and compaction factor test values
Glass Fibre 0% (Control Concrete of M20 grade) 0.5%
1%
1.5%
Mix Designation M0 M1 M2 M3 M0 M1 M2 M3 M0 M1 M2 M3 M0 M1 M2 M3
Silica Fume in % 0 5 10 15 0 5 10 15 0 5 10 15 0 5 10 15
Slump in mm 110 100 95 90 105 98 95 80 95 90 90 82 120 105 95 85
Compaction Factor value 0.92 0.91 0.91 0.9 0.92 0.91 0.92 0.89 0.91 0.9 0.9 0.89 0.94 0.92 0.91 0.89
Fig 9:- Slump Cone Test Values v/s Percentage of Silica Fume
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International Journal of Emerging Technology and Advanced Engineering
Website: www.ijetae.com (ISSN 2250-2459, ISO 9001:2008 Certified Journal, Volume 7, Issue 5, May 2017)
Fig 10:- Compaction Factor Test Values v/s Percentage of Silica Fume
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