What method can help prevent overloading when sieving fine aggregates?

Sieving the sample in parts is an effective method to prevent overloading when dealing with fine aggregates. When a sample is too large for the sieving device, it can lead to inefficient separation and the potential for clogging. By dividing the sample into smaller portions, each part can be handled more effectively, ensuring that the material passes through the sieve properly and allows for accurate results. This method helps maintain the integrity of the sieving process, allowing for a clearer understanding of the material's gradation and characteristics.

In comparison, attempting to sieve all at once can lead to excessive strain on the sieve, resulting in poor performance. Using only larger sieves might not be effective for fine aggregates, as they need to pass through smaller openings to ensure proper classification. Increasing the sample size may seem logical, but it can exacerbate issues with overloading and lead to inaccuracies in results, ultimately counteracting the goal of efficient sieving and analysis.