If you are currently producing PMA (polymer-modified asphalt), D&H would like to help you produce faster and more efficiently. Rather than milling and remilling over several passes, our process offers a solution that provides proven inline mixing and one-pass milling capabilities. Our years of experience in building asphalt blending/modifying equipment helped us design this process for blending and milling polymers into asphalt.
D&H can custom build polymer plants to your specific application with flow rates ranging from 10 TPH to 60+ TPH of concentrated PMA binder production.
Multiple configurations including skid-mounted models for terminal blending, containerized models to allow for economical ocean shipping, and portable trailer models for blending on-site by contractors or for use at multiple terminals.
Advantages
Capability to using one plant to produce either polymer; modified asphalt or asphalt rubber
Greatly reduced digestion time when producing polymer modified asphalt
Capability to refill hoppers without the need to stop blending process
Operations can be run with as little as a two-man crew (operator and groundsman)100% manual backup controls for operation with remote access to PLC
Capability to precisely meter liquid additives into blending process
"Traditional" Polymer Milling
Disadvantages
Batch system setup slows production capability
Longer digestion time
When the polymer has time to soak in the mixing tank before going to the mill, it becomes glue-like and doesn’t mill as efficiently
Because it doesn’t mill as efficiently, it requires multiple passes through the mill, using more time, energy costs, and putting unnecessary runtime hours on the mill equipment
D&H Polymer Milling
Advantages
Continuous one-pass inline blending capability
Reduced digestion time
Polymer is forced through the mill seconds after it combines with the liquid asphalt
Polymer has greater tendency to shatter when it hits the mill since it hasn’t had time to become “glue-like”
German-manufactured high shear mill
Ability to expand production by configuring multiple concentrate and letdown tanks to offering the highest production rate
Advanced automated control system and reporting capabilities