Stop in for a cup of coffee

When I was doing the concrete paving deal years ago, cure time was 28 days. Some years ago Caltrans was "experimenting" with some concrete they could put traffic on in 24 hours. I really would have liked to see the results but my attention had turned to asphalt by then. We had to keep the poured in place bridge decks WET the entire cure cycle, sometimes it was done with rolls of carpet, sometimes it was a little berm around the deck and flood it with water. I was oiling on the truck crane one day, heading back to the yard at quitting time, whole bunch of Caltrans inspectors and most of our paving crew standing around a section of paving from the previous day. My operator honks the horn at me to stop and gets out of the rig and walks over there. "I don't know what they did wrong, but you can stick your finger right into that slab." The next day I was on the big Skip loader loading that concrete into trucks for disposal :rofl:. I knew it was one of their chemical additives that wrecked the concrete. One of those "a little is good" additives. Go much over a little and it turns to expensive backfill.