A portable device that mixes various materials to form Concrete, which are [sic] used to build heavily fortified structures.
In-game description

The Concrete Mixer converts Components into Concrete Materials that can be used to build heavily fortified structures. The produced Concrete Materials are public and can be retrieved by any player. Can be at the Construction Yard. The mixer has to be packaged to be moved by a Crane and can be delivered via Flatbed Truck or the crane itself.

It takes 20 seconds to create one concrete. It takes roughly 2 hours and 45 minutes to mix 5000 components.

Note: Concrete Mixers Decay if they are not near a base with a Garrison Upgrade supplied with Garrison Supplies.

Resource Crafting Rates
Raw Refined Ratio Time per stack (min)
Components Concrete Materials 10 : 1 20 seconds per 1
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