What should be observed when evaluating the size distribution of aggregates?

When evaluating the size distribution of aggregates, it is crucial that the aggregate meets specified gradation limits without having an excessive quantity of fines or oversized particles. This aspect is vital because proper gradation ensures that the aggregate will perform effectively in various construction applications, leading to improved stability, density, and resistance to segregation.

Gradation refers to the range of particle sizes present in the aggregate mix. Meeting the specified gradation limits helps achieve good compaction and strength in the final product. Excessive fines can lead to increased voids and reduced strength, while oversized particles can create irregularities in the material, compromising the integrity of the mix. Therefore, the assessment of aggregate size distribution must focus on achieving a balanced mix that adheres to the specified standards, ensuring the overall quality and performance of the aggregate base.