Abstract: The invention relates to concrete mixing plant suitable for weighing and mixing at least two aggregate materials and cement inside a concrete mixer comprising a container to collect aggregate, weighing and/or dosing scale, a worm-screw to deliver cement, a concrete mixer or mixing machine means whereby the whole is borne by a plurality of legs and/or supports possibly to sustain a silo holding cement, and an elevator wheel suitable for receiving and premixing the aggregates, the wheel being located between the container collecting aggregate and the concrete mixer suitable for receiving the aggregates and cement.