Concrete Crack Repair
Concrete Crack Repair
(OP)
I've been asked to propose a solution to a concrete cracking problem. A pile-supported concrete floodwall, about 9' high, was constructed around a site. To provide a working surface, the contractor had cast a 9" pad along the footprint with no joints. Of course the floodwall has joints at 50' or so, and cracks have formed in the working surface at each joint. I'm looking at how (or whether) to repair the cracks, the main concern is that the occasional water infiltration will allow erosion beneath the wall, especially since the foundation is fairly recent fill.
I'm thinking drill diagonally into the cracks and inject a poly-type sealant. Any thoughts?
I'm thinking drill diagonally into the cracks and inject a poly-type sealant. Any thoughts?





RE: Concrete Crack Repair
Seal the crack with semi-rigid epoxy. It can be injected or the crack can be routed to received the sealant. You don't have to drill diagonally into the crack for injection. It is usually done directly into the crack.
RE: Concrete Crack Repair
U.S. Army Corps of Engineers' Engineer Manual on Retaining and Flood Walls
http:/
RE: Concrete Crack Repair
http://www.xypex.com/
RE: Concrete Crack Repair
I do think a Xypex product (FCM-80?) or similar sealant would be the way to go - something that would have some flexibility to it, since the slab essentially formed its own expansion joints to mirror those on the wall above.
I'm thinking the procedure would be to cut/rout a groove along the crack, and inject sealant on in there. Fairly simple fix (said the guy who's not in the field doing it).
RE: Concrete Crack Repair
Check some of the Tremco/Vulkem sealants. W.R. Meadows Company makes a very good semi-rigid epoxy ReziWeld
RE: Concrete Crack Repair
Recommend the following reference:
Engineer Manual 1110-2-2502 Engineering and Design, RETAINING AND FLOOD WALLS, Department of the Army, U.S. Army Corps of Engineers
http://1
the wall should have been designed for both through seepage and underseepage. It should have a seepage cutoff. Waterstops should be installed between the monoliths down to the bottom of the cutoff. Alternatively, a sheet pile cutoff is commonly used. If this "pad" is below the bottom elevation of the cutoff wall, then who cares if it cracks. If it is at the ground surface, you have a big problem...