What tests (if any) do you (have to) perform on residential structures concrete in your location? Slump test? Cured test cylinders crushed in a lab? Core samples drilled from cast in place concrete and tested in a lab? Any other?

Not to make light of an important subject but here we have the Harley test. You pass ICF test if you can park your Harley in the garage without anyone in the house hearing you. Regards.

Besides Harely test, I'm wondering if any of the residential building codes actually require testing. I couldn't find anything about this topic in my code book but am curious if this is covered in newer residential codes or required by some jurisdictions. It seems to be mandatory for commercial construction and I'm wondering if this also applies to residential (why wouldn't it?) ?

How else does one know that the concrete is actually as strong as specified?

I am accustomed to seeing the results of concrete tests on commercial structures we have had built, but I didn't see anything done for my residential build on any of the nine occasions we had the pump truck out.

This worried me a bit until I had the occasion to take drill, hammer and pickaxe to the cured concrete and found that it seemed as tough as flint. Maybe the difference is that strength ranges for residential builds are much more forgiving than commercial.

Although the exception, it's not uncommon on residential to require testing -- break testing to make the concrete is to spec. Depending on the supplier and your history with him/her it's sometimes a good idea for the supplier to think you "might" have a tester on site. It will cause him to double check the mix design. Regards.

Commercial projects tested on occasion (in Ontario). Sometimes part of contract for 3rd party testing.
Residential never - the building inspector on occasion has requested the truck report (paper indicating job location, mix type, mix design, time of mix, etc. etc.) Never followed up after that, no problems.

Who needs vibration - just add lots of water :-).