How to level concrete gap

[eric04h]

Hey everyone, I have an issue and hoping one of you pros can point me in the right direction.

Behind my garage I have a large concrete slab. A section of it was already there as it was the base of a shed. The shed was surrounded by dirt and tons of weeds so we had a company lay concrete in the surrounding area around the shed.

Well, fast forward to now and I'll be replacing that shed with a much larger one. I finished removing most of the shed today and as you can see in the picture, theres an area where the concrete is not level. It was sloped in a way to make a path for water to go around and away from the Shed / garage.

I had no idea the gap was that large until I removed the shed and saw it. At the highest point it's about 3-4inches, and as it goes, it eventually comes down to the height matching the rest of the concrete.

Can anyone give me the best method / product to fix this issue? Preferably something I can get from Home Depot / Lowes / Menards. I'm guessing making a ramp shape with concrete would be the best way to do it, but all of the concrete patch/fix products Ive been seeing usually aren't for gaps this big.

Regular concrete with concrete bonding adhesive seems like it'll do it, but im not sure if theres a more proper way to tackle it.

All of the concrete is in great condition with no issues or cracks so it really wouldn't make sense to re do any of it.

Thanks in advance!

 

[racecougar]

Will the finished floor surface of the new shed remain concrete? Anything you add on top of the existing slab is likely to fail, particularly at the thin end. Have you considered raising the lower slabs via mud-jacking or foam?

 

[eric04h]

The new shed will be built on its own wood base so besides leveling it, thats not much of an issue. I'm more trying to correct this large gap to get rid of the tripping hazard that'll remain between the garage and shed.

I considered lifting, but on the left side, it's flush with the surrounding concrete.. so lifting any area is only moving the height difference to another area. If I lifted it all to match, I'd most likely end up with way too much of a slope and more of a ramp.

If concrete won't hold then my best bet might be to find some sort of rubber ramp to bridge the gap since the exposed gap / section will only be about 3.5ft once the shed is built

 

[Dig Doug]

If your talking about this (red arrow )

I would probably cut out (saw cut ) a section to ramp up / down to marry to 2 slabs together

need to pay attention to water drainage (where does it go ) and I would drill in some dowels into each existing slab before pouring the new connector piece.

 

[Fav Onefour]

Looks like you have been fighting water with the old shed on the flat pad. Those issues will not go away with a small ramp to the newer concrete.
It is a bummer that the water issue will be an ongoing problem. You have some nice looking concrete. Whatever you do with the concrete and new shed, leave room to repair your garage. That won't be too far down the road. Might as well make it easier.

 

[Chaznsc]

Could you take a piece or two of 2x composite lumber and cut a wedge shape to fill in that gap? Just screw it down. Concrete repair on this scale is likely going to crack.