Yesterday we had new concrete pads poured. We expected pour-day to be the last day. I saw them out there finishing, but when we went out that evening after everyone had left, it looked half done. There were unfinished areas, dips in the concrete, and piles of stuff:
I texted the concrete guys and asked if they were coming back after dinner or what was going on. They texted back that it's normal for it to look like that and that they were coming back today with a grinder to finish it out.
I've never heard of using a grinder as a finishing step (though I've only been a part of a few driveway pours). Is this normal? Will there be any long-term consequences (to stability or performance or appearance) of using a grinder at the end like this instead of just finishing it when wet? Or is this a red flag that things are about to go very badly and I need another contractor to come in and tell me the correct next steps?
I worry that the guys weren't prepared and just ran out of working-time.
To follow up and let everyone know what happened, I confronted them about the work. They admitted that the did not have sufficient experience, and ran out of time before the concrete set. They ground it down and said they would be back in next week to 'resurface' it, and grind down the resurface so it looks like finished concrete. They also told me that as long as the original concrete had not cured, the resurfacing should fully bond and provide adequate strength.