Use of granite dust in partial replacement for fine aggregate

1. Department of Civil Engineering
Presented by,
Nagaraj C Sajjan
5ZH15CCT06
1
UNDER GUIDANCE OF
Prof . Vijaya kumar H R
Associate Professor
Government Engineering College
Hassan

2. CONTENTS
• Introduction
• Source of CGD
• Steel Fibres
• Physical Properties of GCD
• Objectives
• Need of the project
• Strength tests to be carried out on GCD
• Durability tests
• Advantages of SFRC Over Conventional Reinforced
Concrete
• Applications
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3. INTRODUCTION
• Granite Powder is an byproduct produced in granite factories while cutting
into desired shapes
• Granite belongs to igneous rock family which is having compressive strength
more than 200 Mpa
• Granite industry produces around 18 million tons waste per annum
• The physical properties of GCD is more similar to the natural sand hence it
can be used in replacement to natural sand
• GCD is locally available waste material hence it is possible to make
economical concrete
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4. Source of GCD
• Granite cutting dust (GCD) is a waste byproduct produced in granite
factories while cutting into desired shapes
• GCD is a waste product locally available where granite industries are located
4

5. Steel Fibres
• Steel fibres are small piece of reinforcing material are introduced in concrete
to increase its tensile strength
• There are different types steel fibres such as Crimped and Hooked end
• But in my project it is proposed to use hooked end type fibres
• Introduction of steel fibres lead to arresting of propagation of cracks
• Generally the aspect ratio ranges from 30 to 150 (l/d)
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Hooked end steel fibres

6. Physical Properties of GCD
• According to the referred journals GCD is good alternative material for fine
aggregate due to its physical properties as shown below
• Specific Gravity – 2.83
• Fineness Modulus – 2.43
• Water is used to easy cutting of granite stones so the dust is mixed up with
water and available in slurry form
• It is advised to weathering of GCD before using it in concrete as replacement
to sand
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7. Objectives
• To investigate optimum percentage of sand replacement by GCD
• To investigate the effect of steel fibres on the tensile properties of
concrete
• To investigate the amount of corrosion due to introduction of steel
fibres
• To investigate optimum percentage of steel fibres
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8. Tests to be carried out for GCD
• Fallowing basic tests are carried out for granite cutting dust
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Granite Cutting
Dust (GCD)
Fineness
Modulus
Specific Gravity Water Absorption

9. Strength tests to be carried out on Concrete
Granite fine
fibre Concrete
Compressive
Strength
Split tensile
strength
Modulus of
elasticity
Flexural
Strength
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10. Durability Tests
Granite fine
fibre concrete
Accelerated
Corrosion test
Acid attack
test
Sorptivity test
Water
absorption
test
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11. Advantages of SFRC Over Conventional Reinforced
Concrete
• SFRC prevents the propagation of shrinkage cracks, thermal
cracks
• It changes the mode of failure from brittle to ductile nature
• It increases the toughness of concrete
• It increases tensile strength of concrete
• SFRC makes economical than conventional reinforced concrete
in industrial flooring
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12. Applications
• Industrial Flooring
• Runway, Aircraft parking and Pavements
• Tunnel lining and Slope Stabilization
• Blast resistant structures
• Thin shells, manholes, Pipes, and Light poles
• For complex shape (Aesthetic view) buildings where laying of
reinforcement is difficult and time consuming
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13. 13
Thank
You