As you can see, there are lots of variables to answering the how long is hamburger meat good for question. Raw hamburger meat (ground beef) is much more perishable than other cuts of beef and will keep in the refrigerator for only 1 to 2 days. Cooked hamburger meat will keep 3 to 4 days in the refrigerator.
Re: Poured side walk/steps, how long to leave forms? I strip the forms 24 hours later, but am careful not to damage the new concrete. It will still be very soft and with crumble if you put too much force on the edges. Usually concrete will harden withing 30 days to the point where it is considered cured.
Yes, the concrete has set up enough to walk on. Since I have lots of steps I was hoping to get the forms off to dress the area where the treads meet the risers. I cut the step forms to have a 45 deg angle. This allows for you to trowl very tight where tread meets riser.