How many of you guys incounter the dreeded no air mixes? Do you guys have any secrets to pumping this boney mix? I keep it around a 3 slump and turn my agitator in reverse this helps so much. If you pump it too wet you get left with a hopper full of wet rocks. Of course you can always add some tide to the load but most supers will hang you out to dry for that one. Lets here your little secrets in pumping this mix. http://www.pumpoperators.com/brian/ I love to pump concrete. It is in my blood. I will do whatever it takes to do the job right and safely! Almost 20yrs under my belt and still learning.