Ready mixed concrete or concrete that is manufactured at a batching plant or factory. This is made to a set recipe, and then delivered to the workplace/worksite. Transit mixers are used for transportation. This results in ready mixed concretes which have a precise mixture, and this helps achieve specialty concretes to be developed and used on the construction sites.

Ready mixed concrete is very often preferred to the usual mixing of on-site concrete, as it can help reduce the confusion of on site labour, and deliver good quality precision mixes which can be maintained throughout the life of the building project. Sometimes however, relying on a predetermined concrete mixture can reduce the flexibility in the components of the mixture, and the supply chain.

Today, RMC is playing a very important role in building road and civil structures. They offer unmatched rigidity and long life to the structure. Hence it is getting popular and the use is increasing day by day.

Ready mixed concrete is more commonly known as RMC, is usually specifically made and delivered to the construction site freshly pre-mixed in an unhardened or plastic state. The concrete its self contains a mixture of:

• Portland Cement

• Aggregates (gravel, crushed stone, sand etc.)

• Water

These materials are derived from different sources and are then mixed in the specified amounts at the batching plant to produce concrete. RMC can be manufactured to customer specific requirements, and is sold and bought by volume, which is generally in cubic meters.

Ready Mix plants are available in stationary as well as mobile types. The portable RMC plants are also accurate and work where mobility is needed. Mobile concrete plants are available in smaller capacities and are suited for the contractor on the go.

RMC today is manufactured today using computer controlled operations. Computers are playing a major part in the operations of these plants and recipes can be stored and used and customized. Transportation to and from the construction site involves the use of sophisticated and specialized equipment, such as truck mounted transit mixers. There are many advantages of ready mixed concretes some of which are:

• Less wastage of basic materials

• Increased concrete quality

• No labour required

• Reduced noise and dust pollution

• No storage space required for basic materials

• Reduced required time

Some disadvantages can include; long distances may be an issue, site and site access may not be suitable for the weight of the truck, and the concretes lifespan may be affected after 2hrs of leaving the batching plant. Ad mixtures can be used to increase this life span where concrete has to be transferred over longer distances. The first ready mixed concrete factory was built sometime in the 1930s, however the industry did not begin to grow until the 1960s, and it has expanded significantly since then.