Concrete mixer
movable or stationary machine that combines cement, aggregate such as sand or gravel, and water to form concrete
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.
The concrete mixer was invented by Columbus, Ohio, industrialist Gebhardt Jaeger. However Stothert & Pitt's 1885 Price Book records Messers H. Lee & Co used a Lee's Mixer during the construction of the Admiralty Pier at Dover, Kent. Their US Price Book distributor was E. & F. N. Spon, Booksellers, 35 Murray St, New York.
History
One of the first concrete mixers ever was developed in 1900 by T.L. Smith in Milwaukee.
Begin with the source’s own compact description: “Concrete mixer” is movable or stationary machine that combines cement, aggregate such as sand or gravel, and water to form concrete. The dossier treats that line as a proposition to test through Concrete, mixer and movable, not as a finished interpretation.
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This entry incorporates text from “Concrete mixer” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.