What type of material is referred to as "pan" in aggregate terms?

In aggregate terminology, "pan" refers specifically to dust, which is often a fine material resulting from the crushing of larger aggregates or the natural weathering of rock. Dust consists of very small particles that can pass through a sieve with a mesh size of 0.075 mm (No. 200 sieve), which significantly contributes to the gradation and workability of a mixture but can also impact the performance attributes of the final product, such as asphalt or concrete.

Understanding the characteristics of dust is essential for aggregate technicians, as this material can affect properties like compaction, moisture retention, and bonding in mixtures. By identifying dust correctly, technicians can make informed decisions during the mixing process, ensuring optimal performance of the aggregate in various applications.