... productivity:20-22m3/h high output 25m3/h JS500 portable concrete mixer Put water,cement,sand and stones at the rate ... so(it is suitable for JS500),then stop,The concrete is then ready for pipe making.1,Twin shaftCast steel,wear resistant2 ... ,JS2400 ETC, We're a profession concrete pipe manufacture,we also produce concrete pipe making machine,concrete feeder,welding machine,crane,batching hopper ...