A concrete mixer machine (also known as a cement mixer machine) is a device for mixing cement, aggregate, such as sand or gravel, and water to form concrete. Concrete mixers typically use a rotating drum to mix the components.In general, there are two types of mixers: batch and continuous. There are several configurations for each type. A mixer's efficiency is determined by the homogeneity of the concrete it produces. Batch mixing involves loading the ingredients in a predetermined order into the mixer. In a single batch, they are combined to form a homogeneous material. Due to its continuous mixing technology, a continuous mixer is dedicated to one high-volume mixing.