Replacing asphalt floor with concrete

[jagershane]

I have a garage that's on pilings. The base has a layer of cinderblock between the ground and the wooden walls. Currently the floor is asphalt, but I'm removing it and want to put in concrete. Under the asphalt is gravel base. How would I go about putting in a concrete floor? Do I build a wooden frame and inside the cinderblock and attach the rebar to it or do I just pour right to the cinderblock and have the rebar float by just driving rebates into the ground and attach the rebar lattice to it?

 

[Beemer]

That's a confusing description that needs clarifying.
Pilings? Are you at the shore with an elevated building, or built on poor soil, or??? Again the picture is not clear.
Obviously the asphalt paving is on the ground so what would be the reason that the slab can't be on grade as well?
What is the reason that it seems you thing the slab needs attachment to something?

 

[jagershane]

It was an old car port that was converted into a garage. So the structural support is on pilings. The bottom plate of the wall sit on cinderblock. I don't know, I guess I'm asking, does my rebar need to be attached to the sides of the garage

 

[ConCretin]

I don't know, I guess I'm asking, does my rebar need to be attached to the sides of the garage

The short answer is, no.

You're number one priority for a new slab is determining if the existing base under the slab is adequate to support the slab and the loads you place on it. It must be dry, stable and fully compacted. If the existing asphalt wasn't all cracked and heaved, that's a pretty good indication the base is fine. If the asphalt failed, your concrete could too and more investigation is warranted.

Back to the question of rebar. If everything else is done properly, you don't need it all. Its only function is to hold cracks together after they occur. Avoid cracks and you avoid the reason for rebar. In any case, there are specific reasons you don't want it attached to your existing structure.

Take a look at my Guide to Floor Slabs in the link below for some additional thoughts.