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

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Table 4-41: Properties of Cement and Fly Ashes Used<br />

Chemical Composition<br />

(%)<br />

Cement<br />

Type I<br />

ASTM<br />

C150<br />

Type I<br />

Class F<br />

Fly Ash<br />

Class C<br />

Fly Ash<br />

ASTM<br />

C618<br />

Class F<br />

ASTM<br />

C618<br />

Class C<br />

Silicon dioxide, SiO2 20.0 -- 36.5 35.4 -- --<br />

Aluminum oxide, Al2O3 4.3 -- 16.0 23.3 -- --<br />

Ferric oxide, Fe2O3 2.5 -- 7.0 5.6 -- --<br />

Total, SiO2 + Al2O3 +<br />

70.0<br />

26.8 -- 61.5 64.3<br />

Fe2O3<br />

min<br />

50.0 min<br />

Sulfur trioxide, SO3 2.3<br />

3.0<br />

max<br />

1.5 2.4 5.0 max 5.0 max<br />

Calcium oxide, CaO 64.0 -- 2.1 26.7 -- --<br />

Magnesium oxide, MgO 2.0<br />

6.0<br />

max<br />

-- -- 5.0 max 5.0 max<br />

Available alkali, Na2O 0.3 -- 0.7 0.9 1.5 max 1.5 max<br />

Moisture content -- -- 1.2 0.13 3.0 max 3.0 max<br />

Loss on ignition 2.0<br />

3.0<br />

max<br />

31.3 0.6 6.0 max 6.0 max<br />

Physical Properties of Cement<br />

Air content (%) 9.5<br />

12<br />

max<br />

--<br />

Fineness (m 2 /kg) 351<br />

280<br />

min<br />

--<br />

Autoclave expansion (%) -0.02<br />

0.8<br />

max<br />

--<br />

Specific gravity 3.16 --<br />

Compressive strength (psi)<br />

1-day<br />

3-day<br />

7-day<br />

28-day<br />

1990<br />

3500<br />

4230<br />

5420<br />

Vicat time of initial set (min) 145<br />

--<br />

1740<br />

min<br />

2760<br />

min<br />

--<br />

45<br />

min<br />

375<br />

max<br />

--<br />

--<br />

--<br />

--<br />

--<br />

--<br />

--<br />

--<br />

-- --<br />

Physical Properties of Fly Ashes<br />

--<br />

-- 25.5 19.4 34 max 34 max<br />

Fineness retained on<br />

No. 325 sieve (%)<br />

Pozzolanic activity index<br />

with cement (% of control)<br />

7-day<br />

-- -- 64 92.4 75 min 75 min<br />

28-day<br />

-- -- 73 99.4 75 min 75 min<br />

Water requirement<br />

105<br />

-- -- 112 93.0<br />

(% of control)<br />

max<br />

105 max<br />

Autoclave expansion (%) -- -- -0.02 -0.02 0.8 max 0.8 max<br />

Specific gravity -- -- 2.02 2.60 -- --<br />

Field testing was performed during the placement of base course and the<br />

concrete pavement. Slump measurements were taken on both the base course<br />

<strong>We</strong> <strong>Energies</strong> 110<br />

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

Utilization Handbook

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