Concrete mixer
Device that combines cement, aggregate, and water to form concrete / From Wikipedia, the free encyclopedia
"Cement mixer" redirects here. For the alcoholic drink, see Cement mixer (drink).
A concrete mixer (also cement mixer) is a device that homogeneously combines cement, aggregate (e.g. sand or gravel), and water to form concrete. A typical concrete mixer uses a revolving drum to mix the components. For smaller volume works, portable concrete mixers are often used so that the concrete can be made at the construction site, giving the workers ample time to use the concrete before it hardens. An alternative to a machine is mixing concrete by hand. This is usually done in a wheelbarrow; however, several companies have recently begun to sell modified tarps for this purpose.
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The concrete mixer was invented by Columbus, Ohio industrialist Gebhardt Jaeger.[1]