Which statement is NOT a key purpose of using SCM in concrete?

• A. To improve durability
• B. To reduce emissions
• C. To improve workability
• D. Short term curing period

Answer: (D)

SCMs are used to refine the cementitious system to boost durability, lower cement content and associated emissions, and often improve workability by altering the paste’s rheology and particle packing. A short-term curing period isn’t a primary goal of adding SCMs; curing is about maintaining moisture and temperature to allow hydration to proceed, and in some cases SCMs can delay early strength gain, influencing early curing rather than shortening it.