Since absorption will occur as the aggregate soaks in the water, determination of the filled pycnometer mass should be made as quickly as possible, with the measurement obtained no longer than 30 seconds from the introduction of the sample into the water.

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

Answer: (D)

Absorption into aggregate when it’s submerged is a time-dependent process. As the sample sits in water, water continues to move into its pores, gradually changing the amount of water in the system and, therefore, the mass of the filled pycnometer. Because of that, you don’t rely on a fixed, very short window like 30 seconds. The test method requires weighing after the aggregate has reached the specified moisture condition (such as saturated surface dry) and after the prescribed soak time. Weighing too soon would capture an incomplete absorption state and produce inconsistent results. So, the statement is false because the procedure demands following the method’s soaking time rather than limiting the measurement to a rapid 30-second window.