Mixing of concrete is very important as a through and proper mixing produce a uniform concrete of homogeneous mass. It is desired to produce a mix of uniform consistency and color to have good workable concrete to facilitate placing and compaction work followed by mixing process. Now-a-days almost all concrete are mixed with concrete mixing machine for either reinforced concrete or mass concrete of large volume. Machine mixing is the most efficient method of mixing and in regard to economy it also provides economy to concrete production when a large scale concrete production is required. The time consumption for mixing concrete is also a fact to be considered.
Many types of mixer are available in concrete industry and their suitability is different depending on purpose to be served. Whatever the type it is very important to keep mixing running throughout the concreting work up to desired construction joint concreting are achieved. Thus nonstop concreting operation is very important in concrete industry. This purpose can only be achieved if concrete mixture is well maintained.
The mixer should be placed at the construction site on a leveled and firm platform. The blades with drum must always be cleaned after concreting operation. The skip must have proper support like sand bag cushion and should operate carefully. In case of not use, it should be noticed that the drum does not catch rain water or other source of water. In this regard; the drum can be kept covered or can be kept tilted position.