A volumetric concrete mixer (also known as volumetric mobile mixer) is a

concrete mixer A concrete mixer (often colloquially called a cement mixer) is a device that homogeneously combines cement, aggregate such as sand or gravel, and water to form concrete. A typical concrete mixer uses a revolving drum to mix the components. F ...

mounted on a truck or trailer that contains separate compartments for sand, stone,

cement A cement is a binder, a chemical substance used for construction that sets, hardens, and adheres to other materials to bind them together. Cement is seldom used on its own, but rather to bind sand and gravel ( aggregate) together. Cement mi ...

and water. On arrival at the job site, the machine mixes the materials to produce the exact amount of

concrete Concrete is a composite material composed of fine and coarse aggregate bonded together with a fluid cement (cement paste) that hardens (cures) over time. Concrete is the second-most-used substance in the world after water, and is the most wid ...

needed.

How It Works

Volumetric mixers batch, measure, mix and dispense all from one unit. Volumetric concrete mixers can produce exactly the amount of concrete needed when it is needed at any time. Some concrete suppliers offer general purpose concrete batched in a volumetric mixer as a practical alternative to ready-mix if quantities and scheduling are not fully known, in order to eliminate waste and prevent premature stiffening of the mix. The volumetric mixer varies in capacity size up to 12 m³ and has a production rate around 60m³ an hour depending on the mix design. Many volumetric concrete mixer manufacturers have innovated the mixer in capacity and design, as well as added features including color, multiple admixes, fiber systems, and the ability to do gunite or shotcrete. The advantages of a volumetric mixer include: *Reduces waste and associated costs by providing exact quantities. *No risk of premature stiffening of concrete if delays are encountered. *Permits delivery of smaller quantities of concrete. *Night time works do not require the re-opening of a concrete batch plant. *Flexibility to alternate between multiple concrete mixes as required for the application. *Ability to do continuous concrete pours

Sustainability

* Less waste - exact amount of concrete is poured * Less water - volumetric concrete mixers use on average 8-10 gallons of water to clean out versus 200 gallons for a traditional barrel truck * Less emissions - the truck does not need to idle while waiting to pour concrete

History

In the mid-1960's, companies such as Cemen Tech, Reimer Mixers (manufactured under the name ProAll circa 2016), and Zimmerman began building their own versions of volumetric concrete mixers . In 1999, equipment manufacturers created a

trade association A trade association, also known as an industry trade group, business association, sector association or industry body, is an organization founded and funded by businesses that operate in a specific industry. An industry trade association partic ...

, Volumetric Mixer Manufacturers Bureau (VMMB). It had six charter members: Cemen Tech, Inc., Zimmerman Ind, Inc., ProAll Reimer, Bay-Lynx, Custom-Crete, and Elkin.

References

External links

National Ready Mixed Concrete Association Bureaus
{{DEFAULTSORT:Volumetric Concrete Mixer Engineering vehicles