MaxJax floor repair

[thetruck454]

Install went smooth, I barely had enough floor thickness, 5" towards the outside lift and 4.25" on the inside lift. I used epoxy with the wedge anchors to give it an extra bit. Of course after I get done using it for the first time I find this .... Other than cutting a big chunk out and pouring a thicker section with rebar into the existing slab, I don't see an easier way. Any one having have other suggestions before I go rent a bunch of concrete cutting and mixing tools next weekend?

 

[wssix99]

That looks like spalling on the surface due to poor finishing. (vs. an anchor failure.) This would still require a repair and my guess is that the weakened surface of your slab has low compressive strength.

 

[MikeC55]

Did you check the torque on that bolt to see if it comes up to spec? I think this would be the only way to determine if that is just a near surface issue or has the anchor lost grip.

 

[thetruck454]

So to follow up on this I think I figured out what happened. That corner that pulled up was on the back end of the vehicle so had the most force in tension. I'm betting I didn't get the wedge anchors tight enough so it pulled up slightly in the hole. Since I also used epoxy, that top piece of concrete adhered to the anchor very well and popped up with it.

Based on that I'm not sure I need to cut the whole thing out. I want to chip away to see how far down the crack happened. My two thought is just repair the top with epoxy if it didn't go deep. If it did go deep I'm thinking I could take a 6-8" core bit to cut it out then put some L shaped rebar to grab under the slab and fill the plug.

 

[mepstein]

"I used epoxy with the wedge anchors" - I may be reading this wrong but that doesn't sound right to me. There are wedge anchors and epoxy anchors. I don't think you can mix and match.

 

[thetruck454]

I used the wedge anchors as designed, hammered them in and then pulled them up so they "wedged" in place. I also coated the sides of the hole I drilled and the sides of the anchor before I hammered it in.