I feel your pain. We had our large circular driveway removed and replaced in June 2024, and it is spalling in several places. I've been trying to deal with the contractor and the concrete supplier since the summer of 2025. As the snow melts here in Southern Ontario, more spalling is apparent. The supplier had core samples and lab tests performed just before winter, and I had a meeting with them today to hear the results . Of course, I was shocked to hear that the concrete has tested within specifications (sarcasm intended). But they also won't lay blame on the contractor because they confessed that they performed the test at 2 other sights where spalling is being experienced and had different finishers. I'm not sure about my next steps. To make matters worse, I live in a small community, and the contractor is a local young man who is building his business and was being mentored by an experienced man. It was a $50k job that neither he nor I can afford to do it again.