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

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300<br />

290<br />

AMOUNT OF WATER, lbs<br />

280<br />

270<br />

260<br />

250<br />

240<br />

230<br />

0 10 20 30 40 50 60 70<br />

PERCENT CEMENT REPLACEMENT BY FLY ASH<br />

Figure 4–6: Relationship Between Water Demand and Cement Replacement by Fly Ash<br />

(5000 psi Concrete with the same Workability)<br />

Figure 4-7 shows the relation between the water to cementitious material ratio<br />

and the percentage of cement replacement by fly ash for 3,000 psi; 4,000 psi<br />

and 5,000 psi concrete. <strong>The</strong> figure shows that as the percentage of cement<br />

replacement with fly ash increases the water to cementitious material ratio<br />

decreases. <strong>The</strong>se results confirm that fly ash concrete requires less water when<br />

compared to a similar concrete mix without fly ash for a given slump. Less<br />

water equates to denser, less permeable concrete with higher durability.<br />

WATER TO CEMENTITIOUS<br />

MATERIAL RATIO ( By <strong>We</strong>ight)<br />

0.7<br />

0.65<br />

0.6<br />

0.55<br />

0.5<br />

0.45<br />

0.4<br />

0.35<br />

0.3<br />

0 10 20 30 40 50 60 70<br />

PERCENT CEMENT REPLACEMENT BY FLY ASH<br />

Figure 4–7: Relationship Between Water to Cementitious Ratio and Cement Replacement by Fly Ash<br />

(3000, 4000 and 5000 psi Concrete with the same Workability)<br />

63 <strong>We</strong> <strong>Energies</strong><br />

<strong>Coal</strong> <strong>Combustion</strong> <strong>Products</strong><br />

Utilization Handbook

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