Stationary or mobile ready-mix concrete plants with concreting output of compacted fresh concrete from 30m3/hr to 240m3/hr. Single-Shaft Compulsory Mixer with Double Spiral (The Original) for Batches of 500 to 4000 Liters and Hourly Outputs of up to 240 m3. Automatic control system with integrated sequencing logic for batching control, system featuring fail-safe PLC cards, microcomputer batching system, data processing, concrete consistency control and moisture measuring instrument.