Pebblewash Repair

Hi I did my renovation in 2005 when epoxy pebblewash was popular. I did a border around granite tiles in my balcony. Problem is over the years, the epoxy seemed to have disintegrated and more pebbles are coming loose. Even initially, some pebbles were loose. But more are coming off now so there are lots of loose pebbles in my balcony. Does anyone have any advice or experience with how to repair it? Is it just a matter of applying more epoxy over the pebbles?

I would really rather hack up the whole floor and re-do it with tiles. Yes, it was a mistake to go with pebblewash and the granite tiles. Lesson learned. But, I don't want to do it at this point. So I would like any advice for a quick fix. Many thanks.