I’m not sure what material or style these steps are, but they’ve started crumbling after water got into a crack and froze during the winter. It seems to be getting worse and I’m wondering how to address it. Is this something that can be patched or do I need to remove all this material and start over?
Like this: https://youtube.com/shorts/DLjRewoBzwU?si=kT57Not-Zxcuse
Or: https://youtube.com/shorts/DTFTZ3P1KXg?si=sTV-zfUHusBDT7oM
Must use concrete bonding adhesive