Which cement type is most appropriate when sulfate exposure is not present in a slab on ground?

Which cement type is most appropriate when sulfate exposure is not present in a slab on ground?

• A. Type 1
• B. Type 2
• C. Type 3
• D. Type 4

Answer: (A)

When sulfate exposure isn’t present, you use a standard, ordinary cement. Normal Portland cement, Type I, is the appropriate choice because it provides dependable strength and workability at the lowest cost, without the extra sulfate‑resistance features that aren’t needed. Other cement types exist for special conditions—Type II adds some sulfate resistance and reduces heat of hydration, Type III offers early strength, Type IV is for low-heat in mass pours, and Type V is for severe sulfate exposure—but none of those are required for a slab on grade with no sulfate concerns. Type I meets the performance needs efficiently.

When sulfate exposure isn’t present, you use a standard, ordinary cement. Normal Portland cement, Type I, is the appropriate choice because it provides dependable strength and workability at the lowest cost, without the extra sulfate‑resistance features that aren’t needed. Other cement types exist for special conditions—Type II adds some sulfate resistance and reduces heat of hydration, Type III offers early strength, Type IV is for low-heat in mass pours, and Type V is for severe sulfate exposure—but none of those are required for a slab on grade with no sulfate concerns. Type I meets the performance needs efficiently.