Posted by Jason Gettum on Sun, Apr 15, 2012 @ 08:30 AM
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Questions about concrete problems
Question for the expert:
I recently put in a new concrete walkway. Are there common problems I should be aware? If so, how can I repair them? - Don G.
Answer: There are a few common concrete problems:
- Sunken concrete is caused by erosion of the sub-base. The best solution for this is to have a contractor raise the concrete surface and inject fresh concrete underneath it.
- Frost heaving is most common in cold climates. It is when the cold forces concrete pieces off the ground. The best solution is to remove the damaged pieces and restore the sub-base adding an asphalt board to keep the new concrete sections from attaching to each other.
- Cracks or surface deterioration are the most common problems. However, both can sometimes be repaired. Fill small cracks with concrete caulk and for large cracks, use a vinyl-reinforced patching product. As for surface deterioration, this problem is completely widespread with the weakening of the concrete; the best solution to this would be resurfacing, if possible. In some cases, a thin layer of fresh concrete (or an overlay) can be poured over the existing surface.
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