Eastern, MO, USA
Asphalt,
A Missouri hot mix asphalt producer had been running with an outdated dryer/mixer that limited production and quality. The dryer was originally designed with parallel flow, which meant that the air and the aggregate were flowing in the same direction. This design was not as efficient as counterflow, which means that the air and the aggregate are flowing in opposite directions.
Tarmac reversed the airflow of the dryer to counter flow, which allowed for higher virgin rock temperatures and Recycled Asphalt Pavement percentages. This was a significant improvement, as it allowed the producer to produce more hot mix asphalt with better quality.
The dryer was also able to use less energy, which saved the producer money. The dryer was also able to produce less emissions, which was good for the environment.
Reworking their existing dryer was a significant improvement for the producer without the cost of a complete new system. It allowed them to produce more hot mix asphalt with better quality, save money, and reduce emissions. TI139