Pond Boss Forums POND CONSTRUCTION Building a dam Crack in concrete dam

Is there any steel in the concrete, or fibers for reinforcement, or both?

If the crack is wider at the surface than at the bottom of the crack, then the soil under the concrete settled, not expanced. If it's narrower at the top than at the bottom, then the soil expanded.

There is a process that injects epoxy into the crack, the full depth and length of the crack. The expoxy has more tensile strength than the concrete itself. When done properly, I've never seen the epoxy break or pull away from the concrete. The epoxy has no UV inhibitors in it, so once it's applied, it should be covered with something (even a thin layer of latex infused mortar) to keep the sun off of it.

We spent 4 months fixing all the cracks in the L.A. Coliseum after the Northridge Earthquake. It's a common practice for concrete restoration in California. I can't tell you how many house slabs and foundations we fixed, a new waste water digester, a floating 4-lane highway that was used as a pier in San Diego Shipyards, etc., etc.