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At one time cinders were used, but rarely anymore. Occasionally fly ash, a byproduct of coal power plants is used. This allows for less cement to be used.

Ingredients:

1. Coarse aggregate (stone)

2. Fine aggregate (sand)

3. Portland Cement

4. Water

and sometimes:

5. Iron Oxide pigments (for color)

6. Moisture inhibiting admixtures

7. Fly Ash

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15y ago

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