After the cooling period, the aggregate should be immersed in water at room temperature for 15 to 19 hours.

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

Answer: (C)

The test requires bringing the aggregate to a defined moisture state by a soak after cooling. Immersing the sample in room-temperature water for 15 to 19 hours ensures the aggregate reaches a standard moisture condition, typically saturation or saturated surface dry, which makes subsequent weight-based measurements consistent and comparable. Using room temperature avoids altering the mass with heat or cold, and the 15–19 hour window is the specified duration to achieve moisture equilibrium for common aggregates used in asphalt testing. If the soak is too short, moisture content may be underrepresented and affect results; if it’s too long, over-saturation or other minor changes could introduce variability. So the statement is true.