For fine aggregate samples, the immersed mass should be recorded.

• A. True
• B. False
• C. Not specified
• D. Only for coarse aggregates

Answer: (A)

Fine aggregates are highly porous and readily take on water in their capillary pores. Recording the mass of the sample when it is completely immersed captures the water-filled pores, giving an accurate measure of how much water is actually in the aggregate. This immersed mass is used with the dry mass to determine moisture content and absorption, which are essential for calculating the bulk density, saturated conditions, and the proper asphalt content in the mix design. Because fines can hold more water and affect weight and volume measurements differently from coarse material, you need the immersed mass to ensure accurate results. The practice isn’t appropriate to limit only to coarse aggregates, and omitting it would lead to incorrect moisture and absorption calculations.