We Energies Coal Combustion Products ... - The White House

4
DEPTH OF WEAR, mm @ 60 Minutes
3.5
3
2.5
2
1.5
1
0.5
0
28 Day
91 Day
0 15 30 40 50 70
CEMENT REPLACEMENT, Percent
Figure 4–8: Abrasion Resistance vs. Cement Replacement with Class C Fly Ash
DEPTH OF WEAR, mm @ 60 minutes
4
3.5
3
2.5
2
1.5
0% Fly Ash
15% Fly Ash
30% Fly Ash
40% Fly Ash
50% Fly Ash
70% Fly Ash
1
0 1000 2000 3000 4000 5000 6000 7000 8000 9000
COMPRESSIVE STRENGTH, psi
Figure 4–9: Abrasion Resistance vs. Compressive Strength of Concretes Containing Different
Percentages of Fly Ash
Chloride Ion Permeability of High Strength
We Energies Fly Ash Concrete Containing
Low Cement Factor
Permeability of concrete is a very important factor affecting its durability. A
decrease in permeability of concrete increases the resistance to the ingress of
aggressive agents, which in turn, would lead to improved concrete durability.
The following discussion is based on a study conducted at the Center for By-
Products Utilization at the University of Wisconsin in Milwaukee for We
Energies. Several concrete mixes were designed with and without fly ash. The
77 We Energies
Coal Combustion Products
Utilization Handbook