Reattach a chunk of concrete that has broken away from a walkway.?

Question

I was getting ready to repair cracks in the walkways of my hotel, when I realized some cracks go to the edge where a chunk is completely loose, ready to fall onto the parking lot. I got concrete patch and epoxy paint to use on the walkways after. What can I use, basically as a glue, to reattach those chunks? There are 2 large ones, but they are on the edge by a post where they will not get much foot traffic, if any.

Thank you to all who try and help me!!

Answer 1

try buying some quik-krete... u mix it with water and then fill in the space...its pretty simple but can be a little messy

Answer 2

What you need here is some "Thinset Mortar", you can find it in the tile section of your local home depot. Don't let the price throw you as the expensive stuff is meant for installing tile and you are looking to make a repair, so buy the cheap stuff as you are going to also buy the acrylic latex additive that goes with it, this one gallon bottle will be right next to the thinset. This additive is what will act as your "bonding agent" as the mortar will not stick on it's own.(quickrete wont work)  So just mix up a little of the thinset with the additive until the mixture gets to about the consistency of tooth paste and now you have a "Super Strong" cement glue.  Paint the area the chunk needs to be returned to with the additive as well, and make the repair.  You should  let your repair dry for 48 hours before you paint it, to ensure proper curing.

This mixture of mortar is considered "Engineered Concrete"

Answer 3

there is nothing that will glue two old chunks together...pour a new section to fill in the broken portion...

Answer 4

You have to have bonding agent to put on old concrete or else it wont bond to the old concrete.