RE: How many PSI is a concrete pump?
concretemixer > 09-06-2022, 08:52 AM
PSI has to do with pump face pressure, in my line pump it is 1150 pounds because concrete takes 800 pounds before you compress the water out of the mix causing a plug.
i use rubber hose that has a lot of friction so what is required is a six sack per yard mix that is acheved by ordering a 3500 specification.
3000 pound minumum test can be a 3/4 rock with a five sack mix and some of that can be fly ash that are fines but not really a lubricant like cement powder. this might not be a good pumpable mix for my application.
the concrete plant is glad to save you a few bucks on the material but you will have to dump it out of a truck or use a telebelt to place it.
you can achieve high psi by not adding much water that is a 3.5 inch slump that the architechs call for but you can not get the material to flow down the truck chute so why try to work harder to pump it slow just because the customer has no clue of how the risk can change the perameters of a job.