A device for loading, mixing and delivering ingredients includes a measuring bucket pivotably mounted to the free ends of pickup arms pivotably mounted to a mixing vessel including a lid having a depressed basin with an opening formed therethrough. The mixing vessel and the measuring bucket are simultaneously moved with the measuring bucket in a loading position to fill with ingredients. The measuring bucket is moved relative to the mixing vessel from a transport position to an emptying position emptying the ingredients into the mixing vessel. A linkage is pivotably mounted between the pickup arms and the lid to simultaneously move the lid from a closed position to an open position as the measuring bucket moves from the transport position to the emptying position. The ingredients are mixed by mixing paddles inside the mixing vessel, and the mixed ingredients are released from the mixing vessel through an open gate.

There is provided apparatus (301) for mixing contents of a receptacle, the apparatus comprising a rotary shaft (302) equipped at a proximal end with a connection for removable attachment to a means of providing rotation. The rotary shaft has a mixing element (303) fixedly connected at a distal end of the shaft opposite to said proximal end. The mixing element comprises at least two arms (304) at the distal most end of the shaft, a corkscrew neck (306) on the shaft and a collar (305) on the shaft positioned in between the at least two arms and the corkscrew neck. The at least two arms are configured in a first partially-open resting position and are moveable to a second fully-open operative position. The mixing element further comprises a blade (307) positioned across the shaft more proximally than the corkscrew neck.

A device for producing a concrete includes a cement premixer for mixing a cement suspension, the cement premixer having an ultrasonic probe for preparing a cement suspension, a crystallization tank arrangement with the first crystallization tank, for increasing the early strengths of the concrete, and a concrete mixer for producing a concrete mixture from the premixed cement suspension, in particular with the addition of aggregates.