The innovative design of Astec's Double Barrel^®
drum mixer makes perfect sense for today's hot mix
asphalt facilities. It significantly improves the quality
of all mixes, and is able to run up to 50% reclaimed
asphalt pavement (RAP) without using more fuel.

	The Efficient Design Allows up to 50% RAP Mix The Astec Double Barrel drum mixer is the most efficient mixer available today. Heat from the dryer shell is transferred through the tips and shanks into the asphalt mix. The outer shell of the stationary mixing chamber is insulated to prevent heat loss. The meticulous design creates the maximum fuel efficiency for any hot mix asphalt facility. Click to view Milling & Recycling Tech Paper T-127 (PDF)
	Eliminate Blue Smoke Emissions with RAP Since the RAP is introduced and mixed with the superheated virgin aggregate before the injection, the liquid AC is not exposed to higher temperatures than normal. Other mixers inject liquid AC directly onto the hot aggregate, overheating the liquid and causing rapid oxidation and substantial blue smoke emissions. In addition, the exceptional design of the Double Barrel uses the natural draft of gases from the mixing chamber into the drying drum to incinerate any fumes, eliminating blue smoke emissions without additional duct work or fans. This results not only in less emissions, but less maintenance overall. Click to view the Blue Smoke Technical Paper T-143 (PDF)
	Sequential Mixing Creates a More Consistent Mix The Double Barrel's unique design produces a more consistent mix. The long mixing chamber and stationary outer shell provide the ability for adding ingredients sequentially. Sequential mixing eliminates overheating the liquid AC and ensures that aggregate receives a thorough coating with liquid AC before fines come into the mix. Click to view Drying & Mixing Tech Paper T-119 (PDF)
	Easily Operate at a 4:1 Turndown Ratio Astec's exclusive TC2000 control system allows the Double Barrel drum mixer to easily operate at a 4:1 turndown ratio. Multiple point calibration of the belt scales ensure accurate weighing of the aggregate and metering of the asphalt. An independent control for the fuel/air mix on the Phoenix™ burner allows correct adjustment of the fuel/air ratio regardless of the production rate. Click for more information about Controls
	VFD's Reduce Noise & Electricity Astec equips facilities with Variable Frequency Drives (VFD's), significantly reducing the amount of electrical power required to run the facilities at lower production rates. VFD's also reduce noise during plant operation. Better Roads Magazines' 2004 Top Rollout Award Winner
	A Long Life and Reduced Maintenance Costs Astec builds every Double Barrel drum mixer with highly wear-resistant materials to ensure a long life and reduced maintenance costs. Our customers tell us that, without question, the Double Barrel has the lowest maintenance cost per ton. And when maintenance is necessary, operators tell us that the Double Barrel is by far the easiest to work on since a large door opens to provide access. Click for more information about Astec Service
	Optional Double Barrel® Green System The Double Barrel Green system is an option that can be included with any new Astec Double Barrel® drum mixer/dryer or added as a retrofit . The system uses water to produce a foamed warm mix asphalt that is odorless, smokeless and longer lasting. The Double Barrel Green system is a major break through in warm mix asphalt technology because it does not require the addition of expensive commercial additives. Click for more information.