Table 4.2.1 in ACI 318-081 indicates that Exposure Class C2 applies to concrete exposed to moisture and an external source of chlorides from deicing chemicals, salt, brackish water, seawater, or spray from these sources. ACI Committee 318, "Building Code Requirements for Structural Concrete (ACI 318-08) and Commentary," American Concrete Institute, Farmington Hills, MI, 2008, 473 pp.
Definition of Brackish Water Q. We’re designing a concrete foundation that will be in
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