Mixing drum

A mixing drum, comprising:

• a body defining a head aperture and a discharge aperture opposite the head aperture;
• a head coupled to the body and positioned such that the head extends across the head aperture, wherein the head and the body define a volume configured to contain a fluid mixture;
• a bearing member coupled to the body, the bearing member defining a bearing surface surrounding the body;
• and
• a mixing element positioned within the volume and coupled to the body, wherein the mixing element is configured to drive the fluid mixture toward the head when the mixing drum is rotated in a first direction, thereby mixing the fluid mixture, and wherein the mixing element is configured to drive the fluid mixture towards the discharge aperture when the mixing drum is rotated in a second direction opposite the first direction;
• wherein the head is made from a first material, wherein the body is made from a second material, and wherein the first material has a greater density than the second material;
• wherein the body includes at least an inner layer of material and an outer layer of material coupled to one another, wherein the inner layer defines an interior surface of the body, wherein the outer layer defines an exterior surface of the body, wherein the head includes a main body and a connecting flange extending from the main body, and wherein the connecting flange extends between the inner layer and the outer layer of the body;
• and
• wherein the body is formed from at least a first section and a second section, and wherein the first section overlaps the second section.