construction machinery concrete mixer with ladder concrete mixer with ladder is made of adding lifting and self-dumping device on JZC250. Charging volume 400L Discharging volume 250L Productivity 6 8m3/h Mixing drum rotational speed 17r/min Accuracy of water supply 98% Maximum size of aggregate 60mm Mixing motor 4kw Pump motor 0.55kw Maximum towing speed 20kw/h Overall dimension 2260*1990*2750mm Weight 1300kg