During a dry sieve analysis, how are the samples prepared?

During a dry sieve analysis, the samples are prepared by drying. The purpose of drying the samples is to remove any moisture content that could affect the particle size distribution results. Moisture can cause particles to clump together, which may lead to inaccurate measurements during the sieving process. By ensuring that the samples are completely dry, the technician can achieve a more reliable and precise analysis of the aggregate's gradation. This step is essential for obtaining valid data that conforms to testing standards in aggregate analysis, particularly in construction and material performance assessments.

The other preparation methods, while important in different contexts, do not apply to the specific process of dry sieve analysis. Washing would remove fines, which may alter the sample composition. Crushing could break down the samples further than desired. Weighing is typically done after the samples have been prepared for the sieving process, rather than being a preparation method itself.