M aking cement with fly ash in a microwave BY: Hidy , Emmeline, Dylan, Connor, Stuart
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Making cement with fly ashin a microwave
BY: Hidy, Emmeline, Dylan, Connor, Stuart
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What is FLY ASH? Industrial waste through coal
combustion
Can be poisonous
100 million tons per year
collected through
1) static electricity
2) Cyclone
3) Vacuum
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What is cement?
Fine powder made up of calcined lime and clay Calcine def. - To heat a
substance to a high temperature but below the melting or fusing point
Main ingredient for concrete, mortar and plaster
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Why make cement from fly ash? Pozzolan
Substance that is added to CaOH and water at room temperature to form a concrete like compound
When added to concrete mix, less water is needed
Economic benefits Its “green” You get paid
Creates hydraulic cement
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Limestone vs. Lime
Limestone Lime
CF (Chemical formula) CaCO3 CaOH2
Color Gray White
Temperature 21 C 825 C
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Pozzolanic
Roman cement
Parthenon
Type F Fly ash + lime
Heat lime stone untill it turns white at 825 degrees C
Combine
Then add sand and water
Pozzolanic with 1/2 water
Pozzolanic with full water
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Portland (Alite)
Belite Control
Fly Ash 100g 100g 100g
Limestone 185g 50g (lime) 50g (lime)
Sand 285g 410g 410g
Water 150g 150g 150g
Temp 1400 C 325 C 21 C
ControlPortland Belite
Our Samples:
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General
Add sand, water
Mixing
Tamping
Put in molds to set
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Results:Belite Control
(Belite)Portland Pozzolan
ic (1/2)Pozzolanic
Set? Set very hard
no Set partially
Solid state
Soft set
Predicted Success?
yes no yes yes no
Control PortlandBelitePozzolanic with 1/2 water
Pozzolanic
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The business
Is it economic?
Limestone: 25$ per tonFly ash: -20$ per ton
Need to get limestone to 880 *Math*
220KWH per ton (with .8 efficiency) -> 22$ per ton in energy costs
Conventional concrete is 50$ a ton
The space: 1000$/m30 tons a day1.11$ per ton for the space
Labor: 3 people, 8 hours a day each. 12$ an hour.30 tons a day -> 9.6$ per ton
Total = 14.78 profit per ton!
Sell it for 49.99$ a ton
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equipment transportation quality
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Comments or Questions?