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

Table 4-44: Chemical Properties of We Energies Fly Ash
Compositions
Material
SiO2 Al2O3 CaO MgO Fe2O3 K2O Na2O TiO2 LOI
F-2 32.91 19.36 28.85 4.83 5.38 0.34 1.95 1.58 0.64
F-4 48.21 26.26 2.66 1.14 10.61 1.08 2.26 1.21 7.89
Specimens were made by making semi-dry and wet mixtures and casting them
directly into the steel mold for vibrating on a vibration table (33). The molded
specimens were cured for one day in the fog room, then removed from molds
and placed back in the fog room until the time of test.
Nine 2 inch cubes were made for compressive strength and bulk density tests
for each mixture. Three cubes were tested at each test age. Compressive
strength tests were performed in accordance with ASTM C192 “Standard
Practice for Making and Curing Specimens in the Laboratory”. Bulk density
tests were performed in accordance with the ASTM C642 “Standard Test
Method for Density, Absorption, and Voids in Hardened Concrete”
procedures. Mixture proportions are shown in Table 4-45.
Table 4-45: Mix Proportions for Concrete Masonry Units
Mix. No. Cement (%) Fly Ash (%)
Aggregate/
Cementitious
Material
ASTM C618
Fly Ash
17 0 100 4.5/1 Class C (F-2)
18 20 80 4.5/1 Class C (F-2)
19 40 60 4.5/1 Class C (F-2)
20 60 40 4.5/1 Class C (F-2)
25 20 80 4.5/1 Class F (F-4)*
26 40 60 4.5/1 Class F (F-4)*
27 60 40 4.5/1 Class F (F-4)*
28 80 20 4.5/1 Class F (F-4)*
* LOI = 7.89
The aggregate used throughout this work was ⅜” size natural pea gravel as
coarse aggregate and natural sand as fine aggregate. The aggregate in the
mixture consisted of 50% fine and 50% coarse aggregate.
We Energies 114
Coal Combustion Products
Utilization Handbook