I installed an aluminum fence using 80 pound yellow back Quikrete and after about 12 hours some posts were loose. Now after closer to 18 hours they seem better. How long does it take before the fence posts are totally secure? I did not see specifics for this on the bag.
We mixed the concrete per the instructions and videos I saw. It was like thick lumpy oatmeal and formable and certainly not liquid. We used a tamping bar but I was not sure how much or little to tamp it down with either end of the bar. What is the best way to work the concrete once it is in the hole?