JS500 Concrete mixer is double shaft compulsory mixer, it has double advantages: 1> Be operated independently as single, and to be combined with PLD series compounding machine to form simple concrete batching plant. 2>it can provide associated main machine for batching plant, and is applicable to road, bridge, irrigation works, dock and and civil building project. 3>it can mix hard concrete, quaking concrete, fluidity concrete, light weight aggregate concrete and various kinds of mortar, it is a kind of high efficiency model and is used widely all over the world.any question,pls don't hesitate to contact us!