Quote:
Originally Posted by Coldrsx
Not ad hoc, but they can and have contributed to changes in curing which have contributed to issues down the road.
Again, maybe not the case here, but something to consider.
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all those “changes in curing” along with changes in slump characteristics etc. in air entrained concrete are pretty well known and well documented.
when it comes to entrained air, subsequent issues are more likely to be a result of mishandling rather than misdesign or mismixing.
that concrete mishandling can be too much time in the truck or not enough time in the truck, poor form work design that doesn’t adequately allow for rebar design and tie placement not to impede concrete placement without segregating aggregate, poorly sized 🞵🞵🞵🞵🞵🞵🞵🞵 heads, over vibration or not enough vibration... inadequate protection from extreme heat or cold fluctuations during curing can also have a negative impact on its own as well as exacerbating many of the other potential risk factors.
i would also imagine that there would have been enough test cylinders taken and analyzed/destroyed to have verified the concrete itself as being “up to snuff”.
if there is one positive, it might be from the number of failures and their consistency although that’s based on the assumption that all of the failures are the same as those seen here. that would at least assist in identifying the underlying cause and the required solution regardless of how extensive - and expensive - that solution might be.
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