What putting eggshells in garbage disposal does to your pipes.

After using chemicals to clear pipes, CO2 pressure shock devices, and drill operated pipe snakes, cutting the pipe revealed several feet of clogged 2inch pipe. The pipe was clogged with only eggshells. The chemicals cleared out all grease and organic matter. The clean eggshells remained and filled up the pipe for the entire interior diameter. Like/Rumble with the + button. :) thanks.