Patching Concrete Floors - Any Pro's in da house

[mobiledynamics]

I have a small 5x8 inches area in which crete has cracked and lifted on my outside concrete floor.

Can anyone recommend any decent concrete products to use that will last. Or just due to the size, and the next winter, water will seep in the crack and just settle underneath the patch, it will just crack again ?

 

[SunsetsAndFriends]

I have read a lot of posts where the spalled and otherwise weakened concrete surface is ground out with a diamond grinder, thoroughly cleaned, and then patched using an epoxy or similar two part product. Being outside, I do not know how this method would hold up. I've patched using a cement based product before and they seem to hold up okay. But keep in mind that a cement based patch is not expected to be a lifetime repair, especially if in a very cold climate.

 

[LegacyIndustrial]

I have a small 5x8 inches area in which crete has cracked and lifted on my outside concrete floor.

Can anyone recommend any decent concrete products to use that will last. Or just due to the size, and the next winter, water will seep in the crack and just settle underneath the patch, it will just crack again ?

Cement based patches shrink & crack. Choose an epoxy based patch for a permanent repair.

http://legacyindustrial.net/cart/epoxy-concrete-patch-2-gal-hd110-p-90.html

 

[kwfloors]

Can you keep the water out? Sounds like it won't be fixable.

 

[ConCretin]

Pictures would help but if the problem is being caused by movement, freeze/thaw, etc. and those conditions are not corrected, it is unlikely any patch will be effective in the long term. Once you correct the underlying issues, there are many products that would likely work.

 

[mobiledynamics]

Possibly a comob of movement / freeze/thaw.
I have a Outoor Draing/Grate in the concrete.
The chuck of crete is part of one of the edges of where the grate sits. This square drain also have 4 points (expansion joints) that meet on 90 degrees of each other..

 

[ConCretin]

Any chance you can put up a pic? You'd probably get more useful advice.

 

[mobiledynamics]

LL -

Pic as requested.

 

[floorcoatingsguru]

Don't use an epoxy outside. It will become too brittle over time and the patch will amber and yellow over time with UV degradation. Use a repair mortar. We have one called Sikaquick 1000. I'm sure others have one as well. Here's a video of a distributor in Ohio mixing and applying it.

Technical data sheet.

http://www.chasephipps.com/documents/Sika/SikaQuick 1000/SikaQuick 1000 Data.pdf

 

[ConCretin]

LL - Pic as requested.

To be honest, I'm still not sure what caused the crack but the surrounding concrete looks sound and I'd say you have a pretty good chance of effecting a repair.

I'd opt for a cementitious product and since he offered, i'd defer to floorcoatingsguru on selection. Just carefully follow the directions on the bag. Most products want to be placed against an edge rather than be feathered out so you might need to make a shallow cut (1/4") around the perimeter and chip out a little concrete.

If you don't use an actual bonding agent. Wet the surface repeatedly until is is saturated but blot any standing water just before you apply the product.

Also, I'd do two separate patches if you find a crack under the grooved joint. If you got some movement, I'd wouldn't want the patch to span the crack.

Good luck.

 

[mobiledynamics]

Thx all. This is my Pops house. Concrete is a good 25 years if I had to guess.

I know the stuff they carry at Homers / Lowes is poop.
Swung by the 3 supply houses I go when I want the good stuff - Mapei, Sonneborn, etc, etc (the stuff the pros use in commercial).

Nary of these shop cater to the masons...
More searching to continue, but I will limit myself to a 1 HR roundtrip drive to source something that will work or I'll just **** it up and buy a bag of Quickcrete whatever and mix it with Latex admix and no Water

 

[pauls340]

Mobiledynamics, don't know where you're located but after using everything that has been mentioned, I stop testing and using those products. We use 100% of the time Mg-Krete by IMCO Technologies. Any thickness, any temperature, no primers, you just have to work fast on hot days. We've done single lift mixes at Detroit Metro Airport 17" thick tapered to zero. From an engineering point of view, at the leading edge there is no weight limit....loaded 747's are 210 tons! my2c