Minimum sample mass for fine aggregate is 300 g after drying.

• A. True
• B. False
• C. Not specified
• D. Only for washed samples

Answer: (A)

For sieve analysis of fine aggregate, you need a dry sample that's large enough to give a reliable representation across all sieves. A minimum of 300 g after drying provides enough particles to yield stable percentages on each sieve, especially on the finer ones where counts can be small. Drying to constant mass ensures moisture doesn’t skew the weight, so the calculated gradation reflects the actual solids. This requirement is a standard rule and applies whether the sample was washed or not—the mass after drying remains the same. Using less than 300 g would increase variability in the results and make the distribution less dependable.