Compulsory mixer concrete mixer and what is the difference?

Concrete mixer is a big category, compulsory mixer concrete mixer is the next was a category. In fact, the commonly used concrete mixing console is divided into two categories: First, self-loading mixer, stir the material to be posted on the mixing tank wall by the blades on to the air, and then fall by gravity to the bottom of the mixing bucket, and then mention air, so that circulation mixing, such as our common concrete mixing truck mixing drum is this way. stirring in this way generally requires less stirring main motor power (contrast forced mixing), but requires a longer mixing time . the material damage is small.