characterization of fly ash generated from bakreswar thermal power plant dr. arabinda mondal...
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Characterization of fly ash generated from Bakreswar
Thermal Power Plant
Dr. Arabinda Mondal
Department of Silpa-Sadana, PSV, Visva-Bharati, Sriniketan.
11/01/2013 1Dr. Arabinda Mondal, Assistant Professor, Department of Silpa-Sadana, PSV, Visva-Bharati
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 2Dr. Arabinda Mondal, Assistant Professor, Department of Silpa-Sadana, PSV, Visva-Bharati
Classification of Fly Ash
According to ASTM C-6181. Class F fly ash2. Class C fly ash
11/01/2013 Dr. Arabinda Mondal, Assistant Professor, Department of Silpa-Sadana, PSV, Visva-Bharati 3
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 4
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 5
Chemical analysis of Bakreswar fly ash
Oxides Wt%SiO2 62.05Al2O3 30.10CaO 3.50Na2O3+K2O 1.50Fe2O3 2.50LOI 0.73MgO TraceSO4 Trace11/01/2013 Dr. Arabinda Mondal, Assistant Professor, Department of Silpa-Sadana, PSV, Visva-Bharati 6
X-ray Diffraction analysis on Bakreswar fly ash
11/01/2013 Dr. Arabinda Mondal, Assistant Professor, Department of Silpa-Sadana, PSV, Visva-Bharati 7
Scanning Electron Micrograph (SEM) of Bakreswar fly ash
11/01/2013 Dr. Arabinda Mondal, Assistant Professor, Department of Silpa-Sadana, PSV, Visva-Bharati 8
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 9
Prospects of Bakreswar Fly ash Utilization
1. Production of building materialsPortland fly ash cementPortland cement clinkerSintered fly ash aggregate for concreteLime fly ash bricksClay fly ash building
bricks
11/01/2013 Dr. Arabinda Mondal, Assistant Professor, Department of Silpa-Sadana, PSV, Visva-Bharati 10
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 stabilization11/01/2013 Dr. Arabinda Mondal, Assistant Professor, Department of Silpa-Sadana, PSV, Visva-Bharati 11
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 12
8. Development of Fly Ash Based Polymer Composites as Wood Substitute
9. Manufacture of Different ceramic waresRoof tiles (glazed/unglazed)Glazed floor and wall tilesManufacture 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 13
Thank you
11/01/2013 Dr. Arabinda Mondal, Assistant Professor, Department of Silpa-Sadana, PSV, Visva-Bharati 14