Concrete
mixer is a machine which combines the ingredients of concrete. It is a
device that combines cement, aggregate such as sand or gravel, and water
homogeneously to form concrete. Generally concrete mixer consists of a
revolving drum to mix the components. Some concrete mixers are also
supplied with hoopers which helps in mixing work. Hooper supplies the
granulars into a mixer where they are mixed in a definite proportion. The other components of the concrete mixers are diesel engine or electric motors, steel chassis, detachable blades and hydraulic loaders. Portable concrete mixers are often used for small volume of work at the construction site so that it could be used easily by the workers before they are hardened.
For rapid concrete production twin-shaft batch mixers are used which, for industrial production, takes short mixing time. The high turbulence used by them results in the homogeneity in concrete production. Based on the different technologies used, concrete plant mixers are of following types :
- Pan mixer
- Slurry mixer
- Tilt drum mixer
- Horizontal shaft paddle mixer






