ᐅ Hollow concrete blocks (garage) remain loose after compaction

Hello everyone,

Since this is my first post, I’d like to introduce myself briefly.
My name is Stefan, I’m 35 years old from Freiberg, and two years ago I had a solid masonry house built.
I took care of some smaller interior work myself, including laying parquet flooring, painting walls, and attic conversion.
Last year, I built a natural stone wall and constructed a terrace on top of it.
This year, I worked on the exterior landscaping.
I installed 70 meters (230 feet) of curbs around the house, built parking space edging with an adjacent garage, each approximately 6x6 meters (20x20 feet), and today I also paved the parking space.
On the garage’s ring foundation, I laid the first row of hollow concrete blocks to bring the frost protection layer up to the correct level of the parking area so that I can then pave from the parking space into the garage.

Now for my problem.
The paving was done today, but only the parking space for now.
I compacted the entire surface, both parking space and garage, using a small vibrating plate compactor.
While doing so, the four hollow concrete blocks of the garage shifted somewhat.
Thanks to the tongue and groove joints of the adjacent blocks, they stayed in place, but I could still lift them up if I wanted to.

How should I proceed now?

Should I just ignore it since eight more rows will be added? (One block is 33cm (13 inches) long, 25cm (10 inches) wide, and 25cm (10 inches) high, has two hollow chambers, and a flat bottom), … or

Should I remove the blocks, break away the mortar bed from the ring foundation, and reattach them?

Or should I convert the first row into a ring beam by filling it fully with mortar and reinforcing it with rebar?

Thank you very much for your help.
Attached is a photo. The marked blocks are loose.

Best regards,
Stefan

Your description sounds like you set the stones in a gravel bed instead of a mortar bed (?)

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Hello,
No, no, they are already set in the mortar bed.
They have been in place for more than a month now. However, when compacting today, four stones loosened easily.
I am considering removing the stones again tomorrow, chipping off the mortar that is now stuck to them somehow, and re-setting the four loose stones in mortar.

I would also re-mortar them. Not because of stability, but to prevent ant tunnels from forming, water from entering, and the spots from further cracking, etc.

That is indeed a good point.
Thank you for your opinion.

Best regards,
Stefan

To be honest, this also makes me somewhat doubt the proper professional execution at the time, if the bricks come loose from the mortar bed just because there are no additional layers above yet and due to the vibration.

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https://www.instagram.com/11antgmxde/
https://www.linkedin.com/company/bauen-jetzt/