... productivity:20-22m3/h high output 25m3/h JS500 portable concrete mixer Put water,cement,sand and stones at the rate ... only for reference,for pipes,half-dry concrete is OK)into the concrete mixer,operate the mixer,run 60 seconds or so(it is ... JS1500,JS2400 ETC, We're a profession concrete pipe manufacture,we also produce concrete pipe making machine,concrete feeder,welding machine,crane,batching hopper ...