Concrete Crack Repair
Concrete Crack Repair
(OP)
I have read through some other threads on this subject but want to verify a couple things. We have some cracks in a truck bay/garage forming from the corners of the floor drains. Our concern is not with the actual cracks or how they formed (We have a couple ideas why but that isn't the point of this post). For the the most part, they are really just cosmetic.
This is a garage bay where trucks will be washed inside in the winter so there will be a decent amount of water on the slab and there is a radiant heat system in the slab as well. We plan to seal the cracks with an epoxy system and want to know the best approach. I have looked at Simpson's Crack-Pac system and also saw some information on a thread about Sikadur33. Does anyone have a preference on which to use, or any other product. Is there a product that would be best for keeping water from getting down in the cracks (that is one of our main conerns right now). Is there any certain finish that should be used after the epoxy system is placed in the crack? Thanks for any input.
Also, are there any good resources for crack repair for SOG? Does ACI have anything? I know a lot of cracks are cosmetic and are within acceptable range (as these probably are as well). But as previously noted, we are wanting to seal them because of the amount of water they will see.
This is a garage bay where trucks will be washed inside in the winter so there will be a decent amount of water on the slab and there is a radiant heat system in the slab as well. We plan to seal the cracks with an epoxy system and want to know the best approach. I have looked at Simpson's Crack-Pac system and also saw some information on a thread about Sikadur33. Does anyone have a preference on which to use, or any other product. Is there a product that would be best for keeping water from getting down in the cracks (that is one of our main conerns right now). Is there any certain finish that should be used after the epoxy system is placed in the crack? Thanks for any input.
Also, are there any good resources for crack repair for SOG? Does ACI have anything? I know a lot of cracks are cosmetic and are within acceptable range (as these probably are as well). But as previously noted, we are wanting to seal them because of the amount of water they will see.






RE: Concrete Crack Repair
RE: Concrete Crack Repair
If you believe the crack is relatively stable (if it originated from drying or other early age shrinkage), then you could consider epoxy injection to "glue" the slab back together. This would be done by a repair contractor, and is a long term solution. This can be combined with the more attractive top seal if you prefer.
Avoid grinding the flat surface of the concrete. Your slab appears to have a good, hard troweled surface that will be more durable than a ground one.
RE: Concrete Crack Repair
RE: Concrete Crack Repair
RE: Concrete Crack Repair
Let me to understand You: cracks in the slab (in this case above) are caused by shrinkage of concrete?
RE: Concrete Crack Repair
RE: Concrete Crack Repair
RE: Concrete Crack Repair
RE: Concrete Crack Repair
RE: Concrete Crack Repair
RE: Concrete Crack Repair
RE: Concrete Crack Repair
I also noticed Sikadur 33 and 52 are in the structural injection section. There is also a section for waterproofing injection and includes SikaFixHH+ and SikaFixHH. Is there much of a difference between the structural injection and the waterproofing injection? Since we don't have a structural slab (it is SOG) would one of the waterproofing injection products be better? Our primary purpose for repairing the cracks is to keep water from getting into the slab, especially if any salts are washed off trucks in the winter time. We want to avoid though resealing the entire floor. I don't feel that would be necessary at this point. Does anyone know if any of the waterproofing injection products are less rigid than the structural injection products?
I plan to call a Sika person about these questions too but would like to hear opinions from any of you as well, thanks.
RE: Concrete Crack Repair
RE: Concrete Crack Repair
Here is the approach I would use to fix the cracks....
1. Route the surface over each crack to a depth of 1/2 inch and 3/16 to 1/4 inch wide.
2. Gravity flow Sikadur 35 or Sikadur CrackFix into the crack. Allow to penetrate.
3. Fill the routed area with Sikadur 33.
RE: Concrete Crack Repair
You also mentioned early on if ACI had anything on this. The short answer is, yes, they have the concrete repair manual but I'd say that the crack sections simply boils down to "follow manufacturer recommendations for epoxy injection".
Maine EIT, Civil/Structural. Going to take the 1st part of the 16-hour SE test in April, wish me luck!
RE: Concrete Crack Repair
I can name another very famous supplier and that is Fosroc. Their product is Nitofill EPLV and is an excellent crack filling epoxy compound. It will permanently seal the cracks. You can do gravity pouring after cutting a groove of about 15-20mm width and 25mm deep. For more info refer to their online datasheet of the product.