Abstract: A construction machine for conveying thick material has: an electrical energy storage device, an electrical drive device that is electrically connected to the electrical energy storage device, a thick material pump unit and a base frame that has at least three support points spaced apart from one another transversely to a direction of gravity and at which the construction machine is supported relative to a base. In a plan view of the construction machine, a support surface of the construction machine extends between the support points, wherein the electrical energy storage device, the electrical drive device, the thick material pump unit and the base frame are arranged relative to one another in such a way that an overall center of gravity of the construction machine is arranged within the support surface in the plan view of the construction machine and along a longitudinal direction of the construction machine at a distance from a geometric center of gravity of the support surface.

Abstract: A device for damping pressure fluctuations in a delivery line of a thick-matter piston pump. The device includes a container communicating with the delivery line and at least partially filled with a compressible fluid. The container is adapted for a pulsing intake and output of transported material during the pumping operation. A controller adjusts the amount of the compressible fluid in the container as a function of operating parameters. The controller includes a pressure sensor for determining delivery pressure and an electronic computing unit. The computing unit determines and stores a pressure ratio V between delivery pressure values occurring during a working cycle of the thick-matter pump and during a switch-over phase between each working cycle of the pistons of the thick-matter pump. Alternately or additionally, the electronic computing unit may determine and store a mean value M of the delivery pressure over a time interval during the switch-over phase.

Abstract: A device for damping pressure fluctuations in a delivery line of a thick-matter piston pump. The device includes a container communicating with the delivery line and at least partially filled with a compressible fluid. The container is adapted for a pulsing intake and output of transported material during the pumping operation. A controller adjusts the amount of the compressible fluid in the container as a function of operating parameters. The controller includes a pressure sensor for determining delivery pressure and an electronic computing unit. The computing unit determines and stores a pressure ratio V between delivery pressure values occurring during a working cycle of the thick-matter pump and during a switch-over phase between each working cycle of the pistons of the thick-matter pump. Alternately or additionally, the electronic computing unit may determine and store a mean value M of the delivery pressure over a time interval during the switch-over phase.