Minimum mass for fine aggregate after drying is 300 g.

Minimum mass for fine aggregate after drying is 300 g.

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

Answer: (A)

The test needs a representative, stable sample to get reliable gradation results. Drying removes moisture so you’re weighing the true dry mass, and having enough material ensures the sieve analysis yields accurate percentages on each sieve. A minimum of 300 g of fine aggregate after drying is specified to keep sampling error low and the distribution across sieves stable; with less material, small fluctuations or individual particles could skew the results and push them outside acceptable tolerances. This requirement isn’t limited to washed samples—it's about having enough material to get trustworthy data.

The test needs a representative, stable sample to get reliable gradation results. Drying removes moisture so you’re weighing the true dry mass, and having enough material ensures the sieve analysis yields accurate percentages on each sieve. A minimum of 300 g of fine aggregate after drying is specified to keep sampling error low and the distribution across sieves stable; with less material, small fluctuations or individual particles could skew the results and push them outside acceptable tolerances. This requirement isn’t limited to washed samples—it's about having enough material to get trustworthy data.