How to Renovate Damaged Tiles in Garage Driveway

Dear soil scientists,

some tiles in the garage driveway are broken, which I have now removed. Some replacement tiles are still available.

Now I don’t want to do anything wrong: the edge where the car drives up is obviously subjected to more stress. If the garage door didn’t hit there, I would like to lay a rubber ramp mat, but that’s not possible. Therefore, the new tiles should at least be laid as stably as possible.

[*]Is there a special tip for which tile adhesive/mortar to use here? I have already heard of flexible adhesive with which tiles, for example on wood, are less likely to break quickly. Here, however, the subfloor is a stable screed.
[*]Could I achieve something with a better finishing strip?
[*]Should the strip lie directly on the screed or be supported with adhesive?
[*]Should I prime the screed? The old tiles were laid on a green coating. Some of it is still visible and difficult to sand off.
[*]I still have a notched trowel with a 5mm gap from laying parquet flooring. Can I use it?

I would be grateful for useful tips. It would also be welcome if the necessary material were available in small quantities, as I do not need a 10 kg bag.

Thanks and regards,

Thomas

There belongs a stainless steel rail.

And not such a small soft rail


Example

If you take a look at the ABschlussprofil (see photo), you will see that no mortar was pushed through the support ribs during installation. This means that the profile is not supported by pressure from the backside. It can then move when driven over, and movement means for rigid building materials: cracks or pulverization of the structure. In the simplest case, a reaction resin will be run through the open ribs to fill the cavity underneath in a pressure-resistant manner. This should actually be sufficient to then lay ceramic tiles again at the joint. However, it is to be feared that the situation visible here could also be reflected in the area of the first row of tiles still in place. ------------- Greetings to everyone: KlaRa