What is Concrete mixer?
A '''concrete mixer''', otherwise referred to as a '''cement mixer''', is a machine used to mix [[concrete]]. It has a rotating drum driven by an electric or combustion engine. The components of the concrete ([[cement]], [[sand]], aggregate and water) are placed in an opening of the drum. There are portable, in-situ and truck-mounted concrete mixers. ==Gallery== {{Gallery | File:ConcreteMixer4.JPG | An electric concrete mixer | alt1= | File: | Write a caption here | alt2= | File:Gruszka2 poznan.jpg | A concrete mixer truck }} [[Category:Trucks]] [[Category:Machines]]