Repair Cracked and Broken Concrete (Easy DIY) || Garage Floor

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I guess I really am starting from the ground up. Before I can truly start to build my dream woodshop, I have to first do something about the crumbling concrete. In this video, I show you how I go about repairing my cracked and broken concrete floor.

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A trick is to sweep up the garage floor and as the concrete patch is almost fully set up, just sweep the dirt through a few times. It hides your work a bit.

thomas

As Sofaking said, the patch will break apart when the rusting rebar expands again. It might only take months.
You have two options, a long term repair and a longer-lasting short term repair. The longer term repair is to follow the rebar, cracking off the concrete until you find a part that is not rusted on each end. Either a chisel or a diamond blade on an angle grinder should be able to do it. That rebar looks too shallow anyway. Use an angle grinder to cut the rebar with an appropriate blade. Some of the same diamond blades that cut masonry will also cut the rebar. Remove the rebar. Then fill the void with a concrete resurfacer. It will be a blend of portland cement, fine sands and polymer. For a shorter term repair that will still last longer than what you have, use a wire brush attachment on the angle grinder and remove all loose rust. Then carefully apply phosphoric acid to the rebar to convert any remaining rust to black iron phosphate. Finally apply the resurfacer. The first method is the better option in my opinion, because that rebar appears to have been placed too shallowly in the concrete to begin with, making surface moisture wick through the concrete onto the bar.

gordonjohnson

OK, so I'm a nurse and am not an expert on patch work. This was great and informative. And I love some of the smart comments that professionals made. Now I can patch up some small areas of my garage. Minnesota winters are hard on the garage.

dougnarup

I have a very similar crack and this video is the only one I could find that shows a similar gap. Thanks so much for posting, going to try this tomorrow!

cynthialytell

The rebar corrosion caused the crack to form. When steel rusts it expands. Your patch will only hold up for a couple years with the rebar continuing to rust. You need to figure out the reason for the corrosion. How is or did moisture get to the rebar? I recommend looking into structural concrete rebar repair/ replacement. Good luck bud.

mrlickie

I have the same problem, but mine are three small patch jobs. At least now I know what type of cement to buy. Thanks for the video.

dcea

The crack will probably come back after some time because of the rusted rebar BUT, you can repair it perfectly the second time. After you have reached the rebar and remove the loose concrete, hammer the rebar hard on different points, so all the flaked rust breaks both from the rebar and old concrete, and also rebar decouples from the old concrete at some points. After that remove all the loose rust and debris. Get some white vinegar pour it all over the rebar, you can soak it if you can, or add some cloth on it and cover it with plastic so it won't dry out, leave it overnight. Next morning steel wire brush the rebar and vinegared area, wash it good, clean the dirt, and continue from the part that you brushed concrete mix as in the video. the crack will not come back for decades, if you do it this way.

efotube

Great video, better than a McChicken. Such an easy tutorial to follow. I'll definitely be using your tips. Thank you so much!

formeitsmcchickenthebestfastfo

Great video, gonna finally redo my garage and gonna start w fixing a few spots in floor. Thanks

TheEppy

I use to criticize my older brother, when he used a fine measuring tool, ie. the level for rough screeding work, any straight short piece of 2 x 4 does the job and saves your valuable tools for fine measuring. Apart from that, thanks for the Video, I know how much time it takes to do a video.

johnhaakman

How has it held up over the years? Any issues or things you may do different? Great video

MERCEDESE

Just what I needed to know!!! Perfect 👍

budsmith

With the rusty rebar, i was worried the water from the cement mix would cause that to rust more, but I think coating it helped.

Obababoy

Thanks for this Video, its very useful to me as I want to do and area about .5 X 2m, so I wonder how this stands up to traffic such as machinery in my home workshop, any advice would be much appreciated thanks. Brian

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