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Ready mix concrete is concrete that is manufactured in a factory or batching plant,according to a set recipe, and then delivered to a work site by truck mounted in transit mixers. this results in a precise mixture,
allowing specialty concrete mixtures to be developed and implemented on construction sites. The first ready mix factory was built in the 1930s, but the industry did not begin to expand significantly until the 1960s, and it has continued to grow since then.
    Ready mix concrete is often preferred over onsite concrete mixing because of the precision of the mixture and reduced work site confusion.
    Ready mix concrete, or RMC as it is popularly called, refers to concrete that is specifically manufactured for delivey to the customers constuction site in a freshly mixed and plastic or unharderned state. concrete it self is a mixture of portland cement, water and aggregates comprising sand and gravel or crushed stone. Ready mix concrete is bought and sold by volume - usually expressed in cubic meters (cubic yards in the US) .
   Ready mix concrete is manufactured under controlled operations and transported and placed at site using sophisticated equipmet and methods. in 2011, there were 2,223 companies employing 72,924 workers that poduced RMC in the united states.