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.
Place a piece of clean plywood gently over the newly installed tiles if you must walk on them before 24 hours has passed; the board will distribute your weight evenly and take pressure off of the tiles. 1  Plywood.  Avoid walking on the tiles with sharp heels as they may scratch the ceramic surface.