Bouncing on Concrete Roads

Grit dog wrote:
Responses like Dutchman and Larry are correct. Not much you can do when the harmonics line up right.
Fwiw it’s not because the concrete wasn’t placed smooth, but when the control joints are cut, the edges actually swell or scallop up over time. Also cj spacing that is symmetrical causes this. Last mainline concrete paving I did, the dot spec was varied cj layouts. This also helped.
Otherwise, suspension tweaks will help, but even empty trucks do this on some roads.

Exactly.....curling... and it's always going to curl to some extent as it cures. 3 things about concrete. It cracks, it gets hard (you hope and sometimes too fast) and it typically comes in a big truck lol. Add to that the ACI changes recommendations every time they convene, apparently depending on which way the wind is blowing.

To get perfect flatness numbers you would need to cut into no more than 6'x6' or so panels and that does not work all that well with exterior paving, especially in Northern states, unless you want it popping up in chunks after 1 or 2 winters. The other way is too lay it down, let it cure for a year, then go back and surface grind all the control.....super expensive.

I would bet the farm dialing more into the spring bars would make the condition worse in the OPs case.

And for whomever contacted some official who is in charge of concrete roads, how did that request go? I bet it was filed in an oval shaped cabinet lol.