experimental studies on replacement of fine aggregates by bottom ash for developing high strength...
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ADICHUNCHANAGIRI INSTITUTE OF TECHNOLOGY
DEPARTMENT OF CIVIL ENGINEERINGPRESENTATION ON;
EXPERIMENTAL STUDY ON REPLACEMENT OF FINE
AGGREGATE BY BOTTOM ASH FOR DEVELOPING HIGH
STRENGTH CONCRETEPresented by, KIRAN M SANNAKKI :4AI11CV038 CHANDAN H S :4AI11CV406 MOHAN S :4AI12CV413
Under the guidance of, Mrs. RIKITHA K S Asst Professor Civil Department AIT, Chikmagalur.
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Contents
• Introduction• Literature• Objective• Methodology• Reference
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INTRODUCTION
• Concrete is a homogenous mixture of cement, coarse, fine aggregates and water.
• Aggregates are the main constituents of concrete.• Aggregates occupy more than 70% of mix.• Generally the river sand is used as fine aggregate in
concrete and it is obtained by mining the sand from river bed.
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Challenges Facing due to lack of Fine Aggregates
• Increased sand mining effects the aquifer of the river bed & causes environmental problems.
• All metro and mega cities in India are facing acute shortages of good quality of sand
• Unfavorable Government Policies for fine aggregates • These situations made construction industry, in search
of an alternative to fine aggregates.
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BOTTOM ASH• Bottom ash is the fine, solid
mineral residue that results from the burning of coal in boilers
• It is of dark gray color, granular and porous in nature
• Over 70% of electricity generated in India, is by combustion of fossil fuels. In which nearly 61% is produced by coal-fired plants.
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DISPOSAL OF BOTTOM ASH
• Disposed off either dry, or wet to an open area• Mixing it with water and pumping into artificial
lagoon or dumping yards.
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PROPERTIES OF BOTTOM ASH
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LITERATURE REVIEW
• M P Kadam et al ( 2013 ) • K. Nataraj et al• A.Seeni et al• R.S. Bang et al• K. Arumugam et al
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OBJECTIVES
• The effect of furnace bottom ash on fresh properties like workability. Hardened properties like compressive strength, split tensile strength
• The natural sand has to be replaced by bottom ash, 0,10,20,30% and metakolin as mineral admixture 10% for the weight cement
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METHODOLOGY
MATERIALS SELECTION
BASIC TESTS ON MATERIALS
DESIGN MIX
PREPARATION OF SPECIMENS
CASTING AND CURING OF SPECIMENS
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BASIC MATERIALS TESTING
CEMENT• Specific gravity 3.14• Fineness 5%• Normal consistency 32%• Initial setting time 50 minutes• Final setting time 405 minutes
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FINE AGGREGATE
• Sieve Analysis Confirming to Zone II• Specific gravity 2.61• Bulk Density 1026 Kg/m³• Water absorption 1.2%
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COARSE AGGREGATE
• 20mm down size well graded aggregates are used.
• Specific gravity 2.67• Fineness modulus 7.191• Water absorption 0.6%
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ADMIXTURES USED
• Mineral admixture as Metakaolin• Chemical admixture as SP430
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MIX DESIGN
• By using IS 10262 : 2009 we obtain the proportion of 1 : 1.81 : 3.15
• Water cement ratio of 0.39
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FRESH PROPERTIES OF CONCRETE
Workability properties like,• Slump test• Compaction factor test.
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HARDENED PROPERTIES OF CONCRETE
• Compressive strength.• Split tensile strength.
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RESULTS AND DISCUSSIONSFRESH PROPERTIES
SERIAL NO GRADE OF CONCRETE
REPLACEMENT OF FINE AGGREGATE (%)
SLUMP (mm)
COMPACTION FACTOR
1
40
0 35 0.9
2 10 24 0.86
3 20 26 0.84
4 30 28 0.82
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RESULTS AND DISCUSSIONS ONHARDENED PROPERTIES
compressive strength of cubes
7 days 14 days 28 days
sl no
bottom ash added (%)
Dimensions (mm)
compressive strength (Mpa)
compressive strength (Mpa)
compressive strength (Mpa)
1 0
150 X 150 X150
31.67 39.12 48.77
2 10 29.67 33.68 42.11
3 20 31.58 39.648 49.56
4 30 27.65 34.696 43.37
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Split tensile strength of cubes
7 days 14 days 28 days
sl no bottom ash added (%) Dimensions (mm)
Split tensile strength (Mpa)
Split tensile strength (Mpa)
Split tensile strength (Mpa)
1 0
Diameter 10 cmHeight 20 cm
3.5 3.3 5
2 10 2.92 3.18 4.83
3 20 3.31 3.41 5.18
4 30 2.88 3.029 4.59
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Reference
• Aggarwal P Civil Engineering Department, National Institute of Technology, Kurukshetra 136119, India. Asian journal of civil engineering (building and housing) vol. 8, no. 1 (2007) pages 49-62
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Reference• M P Kadam Department of civil engineering, NDMVP’S
KBTCOE, Gangapur road, Nashik-422013, India 2Department of Applied Mechanics, S V National Institute of Technology, Ichchhanath, Surat-395007, India Email: [email protected], [email protected].
International Journal of Advanced Technology in Civil Engineering, ISSN: 2231 –5721, Volume-2, Issue-1, 2013
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PROCUREMENT OF MATERIALS
• Bottom Ash from Adani Power Plant - Udupi• Metakolin from Astra Chemicals ltd - Chennai
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.
THANK YOU