Need concrete tips and suggestions
I'm getting ready to pour some concrete to help finish up a cruddy looking edge on a concrete slab and would appreciate some help.
It's an outdoor slab that my deck sits on. The edges on one side are crooked and look awful, so I'm going to put in some rebar and then smooth out the edges by pouring 3-4" of concrete and extend the edge. First question is what type of concrete do I use? Standard Quikrete? Second question is should I apply some adhesive between the old and new concrete?
The concrete slab sits on my driveway, so my forms are sitting on blacktop, not ground, so I couldn't dig a little trench to set the forms in. The driveway obviously isn't perfectly smooth, so there are gaps here and there under my form boards that I'm worried concrete will run through. Largest gap is around 1/4"-3/8" high. Someone once mentioned using plastic sheeting to fill in the gaps, but I don't want to spend $20-$30 on the sheeting, if possible. The forms I'm using are 2" thick styrofoam insulating boards I had laying around. If I cut some thin pieces of foam and try to fill the gaps with that, will it work? Or will the concrete just push those out?