problem with our concrete

[Repairconcrete]

Hi Everyone
I live in Montreal Canada and I have a problem with our concrete
This is not the actual house its only to give you an idea
http://imageshack.us/photo/my-images/39/stepp.jpg/


This part of the house is not heated and it has many cracks

When they poured the the concrete
the wall and the floor was not fused or bonded

the thickness of the wall is about 5-6 inches

I have made 2 arrows and that is where the cracks are.
what process do the professional companies that repair bridges use
the width of some cracks are about 3/4 quarter of an inch

I found this but this loos like repais for very thin cracks
http://www.radonseal.com/crack-injection/images/injection-movie.htm
Can anyone make suggestions for making a repair like this
I also found this but the problem with these are that they are repairing crack that are narrow
The problem with our cracks are that they are not narrow and you can see threw some areas from inside going outside.

Thanks

 

[Morrisman]

If you are sure any settlement has finished you could fill 'em with concrete.

How long ago was the work done, and can you contact the people who did it?

 

[Repairconcrete]

Hi Morrisman
The home is about 30 year old
The first repair job lasted a long time about 20 years if I am not wrong and it looked like this job

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I like to use one of these 2 companies but I am not sure which
http://www.radonseal.com/crack-injection/images/injection-movie.htm

Other than the technique here I think the glue type is also important
Would anyone know which would be a better quality
I took a quick look in their web site to see the chemicals used in the glue but it couldn't find any info
Thanks very much

 

[ConCretin]

I'm not familiar with the specific products you have identified but we use similar products. I assume you have water coming through the cracks and that is what you are looking to correct. sealing a crack structurally is another issue and is rarely necessary.
The polyurethane product is superior for this purpose. It is messy - the material will foam out of the cracks and ports. It also requires the presence of water to work properly.
We drill holes in alternate directions every 6" or so at a 45 degree angle so that the drill hole passes through the crack. You then install special ports with a grease fitting. You can use a standard grease gun to inject the material. For bigger jobs a specialized pump is used. Remove the ports, clean up the mess and hope the water doesn't find a new way in.