Cooling methods for the pavement during coring may include water, ice, dry ice, and liquid nitrogen.

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

Answer: (C)

Cooling during pavement coring is used to keep the asphalt and binder from heating up too much, which can cause smear and deformation of the core. Water is the most common method, sprayed or circulated to carry away heat. Ice can be used to chill the cutting area further, helping to harden the material slightly for a cleaner cut. In some situations, dry ice or liquid nitrogen are used to achieve rapid, deeper cooling, especially when a very cold environment is needed to prevent smear or to preserve brittle fracture behavior for a clean sample. Because these options can be employed to control temperature during coring, this statement is true.