Characterization of fly ash generated from Bakreswar
Thermal Power Plant
Dr. Arabinda Mondal
Department of Silpa-Sadana, PSV,
Visva-Bharati, Sriniketan.
11/01/2013
Dr. Arabinda Mondal, Assistant Professor, Department of Silpa-Sadana, PSV, Visva-Bharati
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What is Fly Ash?
Fly ash is finely divided
residue generated in the
combustion of powdered
coal and transported by the
flue gases and collected by
electrostatic precipitator.
11/01/2013
Dr. Arabinda Mondal, Assistant Professor, Department of Silpa-Sadana, PSV, Visva-Bharati
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Classification of Fly Ash
According to ASTM C-618
1. Class F fly ash
2. Class C fly ash
11/01/2013
Dr. Arabinda Mondal, Assistant Professor, Department of Silpa-Sadana, PSV, Visva-Bharati
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Fly ash – Hazards to Environment
and Life
Fly ash contains trace amounts of toxic
metals like Th, Cr, Pb, Hg, Cd, Mn, Cu, Co, As,
etc., which may have negative effect on
human health and on plants.
11/01/2013
Dr. Arabinda Mondal, Assistant Professor, Department of Silpa-Sadana, PSV, Visva-Bharati
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Physico-chemical properties of
Bakreswar fly ash
•
•
•
•
•
Particle size: 0.5-27.3 µm
Surface area: 75 m2/g
Specific gravity: 2.11
pH value: 10.30
Carbon content: 0.59 %
11/01/2013
Dr. Arabinda Mondal, Assistant Professor, Department of Silpa-Sadana, PSV, Visva-Bharati
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Chemical analysis of Bakreswar fly ash
Oxides
SiO2
Al2O3
CaO
Na2O3+K2O
Fe2O3
LOI
MgO
SO4
11/01/2013
Wt%
62.05
30.10
3.50
1.50
2.50
0.73
Trace
Trace
Dr. Arabinda Mondal, Assistant Professor, Department of Silpa-Sadana, PSV, Visva-Bharati
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X-ray Diffraction analysis on Bakreswar
fly ash
11/01/2013
Dr. Arabinda Mondal, Assistant Professor, Department of Silpa-Sadana, PSV, Visva-Bharati
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Scanning Electron Micrograph (SEM) of
Bakreswar fly ash
11/01/2013
Dr. Arabinda Mondal, Assistant Professor, Department of Silpa-Sadana, PSV, Visva-Bharati
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Conclusion
• From the compositions of fly ash sample, it can
be concluded that the fly ash sample belongs to
ASTM class F.
• Fly ash particles are almost totally spherical in
shape, allowing them to flow and blend freely in
mixtures.
• Pozzolanic properties of fly ash can be identified
by presence/absence of calcium oxide. So class F
fly ash is the weak in pozzolanic as very less
amount of calcium oxide present.
11/01/2013
Dr. Arabinda Mondal, Assistant Professor, Department of Silpa-Sadana, PSV, Visva-Bharati
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Prospects of Bakreswar Fly ash
Utilization
1. Production of building materials
Portland fly ash cement
Portland cement clinker
Sintered fly ash aggregate
for concrete
Lime fly ash bricks
Clay fly ash building bricks
11/01/2013
Dr. Arabinda Mondal, Assistant Professor, Department of Silpa-Sadana, PSV, Visva-Bharati
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2. Road and air field pavement
construction
Fly ash in road construction
Embankment
Lime fly ash concrete
Cement fly ash concrete
Lime fly ash soil stabilization
11/01/2013
Dr. Arabinda Mondal, Assistant Professor, Department of Silpa-Sadana, PSV, Visva-Bharati
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3. Filler material in the reclamation of land and
in mining
4. Plant nutrient
5. Manufacture of paints
6. Preparation of domestic cleansing powders
8. Manufacture of rubber and plastics as filler
10/01/2013
Dr. Arabinda Mondal, Assistant Professor, Department of Silpa-Sadana, PSV, Visva-Bharati
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8. Development of Fly Ash Based Polymer
Composites as Wood Substitute
9. Manufacture of Different ceramic wares
Roof tiles (glazed/unglazed)
Glazed floor and wall tiles
Manufacture of Sanitaryware
10. Ceramic fibers, decorative glass,
contineous casting mould powders, etc.
11/01/2013
Dr. Arabinda Mondal, Assistant Professor, Department of Silpa-Sadana, PSV, Visva-Bharati
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Thank you
11/01/2013
Dr. Arabinda Mondal, Assistant Professor, Department of Silpa-Sadana, PSV, Visva-Bharati
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