A drying period after curing increases resistance to freezing and thawing damage. Which statement best describes this effect?

A drying period after curing increases resistance to freezing and thawing damage. Which statement best describes this effect?

• A. It increases resistance to freezing and thawing.
• B. It decreases resistance to freezing and thawing.
• C. It has no effect on freeze-thaw resistance.
• D. It increases curing time but not freeze-thaw resistance.

Answer: (A)

Drying after curing reduces the moisture inside the concrete pores. When water inside those pores freezes, it expands and creates internal pressures that can crack and damage the material. With a drying period, there is less water present to freeze, so the pressures generated during freezing are smaller. That lowers the potential for damage over repeated freeze–thaw cycles, making the concrete more resistant to freeze–thaw damage. So, the statement that describes this effect best is that it increases resistance to freezing and thawing.

Drying after curing reduces the moisture inside the concrete pores. When water inside those pores freezes, it expands and creates internal pressures that can crack and damage the material. With a drying period, there is less water present to freeze, so the pressures generated during freezing are smaller. That lowers the potential for damage over repeated freeze–thaw cycles, making the concrete more resistant to freeze–thaw damage. So, the statement that describes this effect best is that it increases resistance to freezing and thawing.