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?