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Concrete is a material composed of
- **[[cement Cement]]**- Most commonly Portland cement
- **Fine [[aggregate Aggregates]]**- Commonly sand
- **Coarse Aggregates**- Commonly crushed stone or gravel
- **Potable Water**- The water must be potable (drinkable, without salts or impurities)
and can also have [[ConcreteAdmixtures admixtures]] which affect its properties.
Concrete does not dry, rather it undergoes a chemical reaction called [[hydration]]. Its consistency can be managed by varying the [[WaterCementRatio water/cement ratio]], and the addition of some admixtures.

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