This compression system is a very handy invention, especially for Web users, because it lets you reduce the overall number of bits and bytes in a file so it can be transmitted faster over slower Internet connections, or take up less space on a disk.
Concrete hardens to 600PSI (Minimum) after 24 hours. This means that 5 three grown men could all stand on a pogo stick (if that were possible) who's base covers 1 square inch without harming the concrete. You walking with shoes on exert about 10 PSI, well below anything that could damage the new pour.
When is it safe to walk on fresh concrete? Sorry for such a newbie type of questions, but when is it typically safe to actually walk on a new concrete pad? I know the curing takes upwards of 28 days, but that's besides the point. Also what's the time frame for quick setting (for walking on it)?