Is it acceptable to wall up with defective stones?

When I read that, I get a crisis. Blocking off the defective aerated concrete blocks, that’s none of your business. First of all, there is no joint pattern and then these blocks don’t hold anything anymore. Not to mention the statics. We had these sorted out and used them as filling.

No, you can use the broken stones as filler material. But they don’t belong in the wall. There are professionals, that’s unbelievable. They probably have never heard of [Statik] and [Festigkeit].