Types of Machine Mixer:

Tilting Type Mixer (T) consists of a bowled shape or double-conical- frustum shape drum, which rotates on an inclined axis. Figure 4 shows a typical sketch of tilting type concrete mixer. In these types of mixer the feeding and discharging operations are performed through its top opening. As the mixed concrete is discharged from the open top of the drum by tilting the drum

Downward, it is popularly known as tilting type mixer. Inside the drum, the vanes are fixed in such a manner so as to direct the concrete to move into circulatory path when drum is rotated. Subsequently, during each rotation of drum these vanes lift the mixture to a certain height and then allow the mixture to drop towards bottom of the drum.

Figure: Tilting Type Concrete Mixer

This type of mixer is generally preferred for the concrete mixes of low workability and for those with large size aggregates. These mixers being movable type can be conveniently used at most of the construction sites. As per IS: 1971 (1968), the size/capacity of a mixer is defined by the total volume of concrete that can be mixed in a batch. It is given in litres and designated as 100 T, 85 T, 140 T and 200 T, while 'T' represents the tilting type mixer and numeric data represents one batch capacity in litres.