Astec Double Barrel^® XHR Drum Mixer

Overview

The Double Barrel XHR system runs mix with up to 65% RAP*

The Astec Double Barrel XHR achieves a quality high RAP mix. To achieve this quality mix, it utilizes both an outer chamber on the drum and an external mixer with the addition of the V-Pac^™ Stack Temperature Control System to maintain as low an exhaust temperature as possible when running high RAP content. A stainless-steel drum and stainless-steel combustion flights withstand the higher temperatures associated with running high RAP. The Astec warm mix system comes standard on all Double Barrel XHR mixing systems.

*65% RAP based on 5% RAP moisture

Double Barrel XHR

Applications

Asphalt Mixing

A thermal mixing process is required to turn aggregates and liquid AC into an asphalt pavement mix for road construction. This makes an asphalt mixing plant necessary for road construction. The complete line of Astec asphalt mixing plants, and its range of capacities and features, gives you the choices and flexibility to create your optimum solution.
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Recycled Asphalt Pavement

Recycled asphalt pavement (RAP) is asphalt paving material recovered from old road beds either by milling or excavation.
Learn More

Downloads

Astec Double Barrel Brochure English
Download (pdf) 10 MB
Astec Double Barrel Drum Brochure French
Download (pdf) 14 MB

Key Specifications

Drum Size (m)	Mixing Chamber Size (m)	Metric Tons Per Hour (MTPH)
1.8 x 13.1	5.9	181
2.1 x 14.6	5.9	272
2.4 x 15.2	6.9	362

Drum Size	Mixing Chamber Size	Tons Per Hour
6' x 43'	19' 4.5"	200
7' x 48'	19' 4.5"	300
8' x 50'	22' 10.5"	400

Drum Size (m)	Mixing Chamber (m)	Metric Tons Per Hour (MTPH)
1.8 x 13.1	5.9	181
2.1 x 14.6	6.8	272
2.4 x 15.2	6.9	363
2.7 x 17.3	6.9	454
3 x 18.2	6.9	544

Drum Size	Mixing Chamber	Tons Per Hour
6' x 43'	19' 4.5"	200
7' x 48'	22' 4.5"	300
8' x 50'	22' 10.5"	400
9' x 57'	22' 10.5"	500
10' x 60'	22' 10.5"	600

UNITS:

All specifications subject to change without notice.

Features

Outer Mixing Chamber

Astec's Double Barrel XHR achieves a high RAP mix by utilizing both an outer chamber on the drum and an external mixer.
Thorough Mixing Zone

The external mixer vigorously mixes virgin liquid asphalt cement, as well as other admixtures.
V-Pac Stack Temperature Control System

Astec’s V-Pac Stack Temperature Control System uses v-flights and a variable frequency drive (VFD) drum to help facilitate producing many different types of mixes, while controlling stack temperature, without the added cost and time of flight changes. Astec’s v-flights shower along the edge of its notch, as well as its tips, creating a wider veil that increases the effectiveness of the veil by exposing more material to hot gases.
Less Maintenance Cost

The cost of maintaining the Double Barrel dryer/drum mixer is comparatively low, because Astec uses proven wear materials. High-chrome, heat-treated, mixer paddle tips and wear plates in the mixing zone stand up to ton after ton of abrasive material. The burner end of the drum, as well as the mixing chamber outershell, are fabricated from a high strength, low-alloy steel for superior heat-resistance and lined with wear plates at critical wear areas.