Cores should be protected from freezing or excessive heat to prevent sample distortion.

• A. Not Applicable
• B. Not Stated
• C. True
• D. False

Answer: (C)

Keeping cores at stable temperatures is essential to preserve their shape and dimensions so test results reflect the in-place material. Freezing can cause water in the core to expand, leading to cracks, warping, or distortion, while excessive heat can soften the asphalt binder and allow the core to deform or lose compaction. Both scenarios alter thickness, density, and other properties, making measurements unreliable. Because protecting cores from freezing and overheating is a standard, practical precaution to maintain sample integrity, the statement is true. The other choices don’t fit because they deny a clear, established practice meant to keep test results accurate.