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1904.1 Exposure Categories and Classes
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Concrete shall be assigned to exposure classes in accordance with the durability requirements of ACI 318 based on:
- Exposure to freezing and thawing in a moist condition or deicer chemicals;
- Exposure to sulfates in water or soil;
- Exposure to water where the concrete is intended to have low permeability; and
- Exposure to chlorides from deicing chemicals, salt, saltwater, brackish water, seawater or spray from these sources, where the concrete has steel reinforcement.
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