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That one cold joint on a driveway in Amarillo cost me 8 hours
Back in 2017 I was pouring a driveway in Amarillo and a cold joint formed right in the middle when my second truck showed up 40 minutes late. I tried patching it with a bonding agent and re-troweling, then covered it with a wet burlap tarp hoping it would cure out, but the color never matched right. Ended up busting out a 4 foot section and re-pouring it the next day, which took another 8 hours plus a load of concrete I ate the cost on. Does anyone have a trick for hiding a cold joint on a broom finish, or is busting it out the only real fix?
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webb.val12d ago
Man, cold joints on broom finish are the worst. I read somewhere that if you catch it early enough while the concrete is still green you can work a little straight edge along the joint and re-broom it so the texture blends, but once it sets you are pretty much stuck with it. A guy on a concrete forum swore by rubbing the joint with a mix of cement and water to even out the color, but that sounds like a band aid that fails after a winter or two. From what I have seen busting it out is the only fix that actually holds up, and even then you have to watch your mix and water so the patch matches. Hiding it just moves the problem down the road.
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