Which cement type is designated for moderate sulfate resistance?

Which cement type is designated for moderate sulfate resistance?

• A. Type I
• B. Type II
• C. Type III
• D. Type IV

Answer: (B)

Moderate sulfate resistance is provided by cement that has adjustments to limit the chemical reactions sulfates cause in the concrete, especially reducing the amount of tricalcium aluminate (C3A) and controlling hydration. This is the purpose of Type II cement, which is designed for environments with moderate sulfate exposure. It stays durable in those conditions while offering standard strength development. The ordinary Type I cement is general-purpose and doesn’t include the enhancements for sulfate resistance. Type III focuses on high early strength, not sulfate durability. Type IV is a low-heat cement used for large pours, not for sulfate resistance.

Moderate sulfate resistance is provided by cement that has adjustments to limit the chemical reactions sulfates cause in the concrete, especially reducing the amount of tricalcium aluminate (C3A) and controlling hydration. This is the purpose of Type II cement, which is designed for environments with moderate sulfate exposure. It stays durable in those conditions while offering standard strength development.

The ordinary Type I cement is general-purpose and doesn’t include the enhancements for sulfate resistance. Type III focuses on high early strength, not sulfate durability. Type IV is a low-heat cement used for large pours, not for sulfate resistance.