Arizona Concrete

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as an interground addition. Materials used in the manufacture
of portland cement must contain appropriate proportions of calcium oxide, silica,
alumina, and iron oxide components. During manufacture, analyses of all
materials are made frequently to ensure a uniformly high quality cement.
Selected raw materials are crushed, milled, and proportioned in such a
way that the resulting mixture has the desired chemical composition. The raw
materials are generally a mixture of calcareous (calcium oxide) material, such
as limestone, chalk or shells, and an argillaceous (silica and alumina) material
such as clay, shale, or blast-furnace slag. Either a dry or a wet process is
used. In the dry process, grinding and blending operations are done with dry
materials. In the wet process, the grinding and blending are done with the
materials in slurry form. In other respects, the dry and wet processes are very
much alike.
After blending, the ground raw material is fed into the ...

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23%
Ferric Oxide Cement 3% Ash 6%
Calcium Oxide Cement 64% Ash 3.5%
Mag. Oxide Cement 2.5% Ash 1.2%
Sulfur Trioxide Cement 3% Ash .2%

These combine to make:

1. Tricalcium silicate C3S
2. Dicalcium silicate C2S
3. Tricalcium aluminate C3A
4. Tetracalcium aluminoferrite C4AF

1 and 2 make up 75% of cement. 1 and 2 plus H2O equal CSH (Calcium Silicate
Hydrate) which is the glue. Fly Ash is C3S plus C2S which equals Calcium
hydrazide which is a white stuff and water soluble. Calcium ...

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