matching appearance of existing and patched concrete
matching appearance of existing and patched concrete
(OP)
Gents-
Have a client who wants to repair fifty year old exposed architectural concrete and have the new patching match the older existing material as closely in appearance as possible. The repairs required are typically patching of partial-depth spalls (due to poor cover on bars).
The old concrete is of course weathered and carries some dirt, and will need to be cleaned. Are there ways that new concrete or new vert/overhead repair mortars can be tinted or colored (but not painted) after or before placement? I have heard that a skilled mason can sometimes match old brick mortar, is it feasible to do the same thing in concrete with trial colored mixtures etc?
The texture of the new materials also has to be adjusted to match if possible.
This appears to be a very difficult and maybe impossible task and I wonder if anyone else has attempted it.
Have a client who wants to repair fifty year old exposed architectural concrete and have the new patching match the older existing material as closely in appearance as possible. The repairs required are typically patching of partial-depth spalls (due to poor cover on bars).
The old concrete is of course weathered and carries some dirt, and will need to be cleaned. Are there ways that new concrete or new vert/overhead repair mortars can be tinted or colored (but not painted) after or before placement? I have heard that a skilled mason can sometimes match old brick mortar, is it feasible to do the same thing in concrete with trial colored mixtures etc?
The texture of the new materials also has to be adjusted to match if possible.
This appears to be a very difficult and maybe impossible task and I wonder if anyone else has attempted it.






RE: matching appearance of existing and patched concrete
Dik
RE: matching appearance of existing and patched concrete
Could you possibly "patch" the whole thing?? Probably out of the question....
RE: matching appearance of existing and patched concrete
Might be worth a try but I agree that be it will be difficult, particularly if it's a large area. You're right -it comes down to the mason's skill.
RE: matching appearance of existing and patched concrete
The workers did conceal some epoxy lines with ground up stone dust, applied while the epoxy was still tacky. Again, it took many trials to get something close to blending.
Good luck.
RE: matching appearance of existing and patched concrete
Intrusion Prepakt /marineconcrete.com
RE: matching appearance of existing and patched concrete
Richard A. Cornelius, P.E.
WWW.amlinereast.com