Concrete With ready connection - type of concrete, which is made at factory or batching a factory, according to the recipe of a set, and then is put to worksite, lorry the established mixers of transit. It comes to an end by an exact mix, allowing a mix of concrete of a speciality to be advanced and is carried out on sites of a design. The first factory with ready connection was constructed in 1930, but the industry did not begin to extend up to 1960 is significant, and it has continued to grow since then.