Hello, I had ran into trouble with easy flow mix. It seems like the plant relied on more sand and other additives instead on cement. As a result I got plugged time after time. Curious whether this sort of thing happened to other operators if yes how did you avoid it.

do a minimum of five a half sack powder and a sack and a half blend sand, fly ash or dura slag. or combinations using the fine sand to fill the washed out fine aggregate that has been the common problem. VMA does not fix the problem but have been told that scoops of silty dirt will do the job. 

Sounds like the key is in adding more cement to the mix.