Post on 07-Jan-2016
description
Making cement with fly ashin a microwave
BY: Hidy, Emmeline, Dylan, Connor, Stuart
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
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
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
Limestone vs. Lime
Limestone Lime
CF (Chemical formula) CaCO3 CaOH2
Color Gray White
Temperature 21 C 825 C
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
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:
General
Add sand, water
Mixing
Tamping
Put in molds to set
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
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
equipment transportation quality
Comments or Questions?