Concrete base problem in garage shop. Any construction folks?

I used 3/4 clean fill. Also, used a 200lb vibrating compactor anyway for $60 bucks rental. It's cheap insurance even though most contractors wouldn't have done it with 3/4. I ran it every 6 inches of fill for 4 hours. I did all the forms, fill and laser level where I wanted floor. Poured it today 6mil plastic, rebar grid, expansion material against block. and 3500 psi with fiber. Thanks for all the advice. I helped pour to be third man to pull up rebar during pour and kept an eagle's eye on the contractor. Got a break on labor from contactor when he realized I knew something about concrete work. Photos to follow if interested. Craig