A batch plant is different from a drum plant because:

The distinction between a batch plant and a drum plant is significant in asphalt production. A batch plant typically processes materials in distinct batches, allowing for more precise control of the mix design. The presence of a tower that contains hot bins is a defining characteristic of a batch plant.

In these hot bins, aggregate is stored at elevated temperatures to prevent moisture and achieve optimal mixing temperatures for the asphalt binder. This configuration enables the controlled introduction of varying aggregate sizes and types into the mixing unit. The batch plant's ability to manage multiple aggregate types and the precise timing of material inputs contribute to the unique characteristics of the final asphalt mix.

In contrast, a drum plant operates continuously and generally combines aggregate, asphalt binder, and other additives in one continuous process. It does not utilize a separate tower and hot bins for aggregate, which is a fundamental differentiating feature from a batch plant. Understanding these differences is crucial for inspectors working in the field, as each plant type has its own operational techniques and quality control measures.