What type of concrete is this?

[Norschan]

Hello, I have a house with a basement originally from 1946, but due to an extension and a subsequent repair in connection with a door replacement, it seems there are 3 different types of concrete in the basement. I wonder what types of concrete these are? Image 1) Extension? Image 2) On the right, repair?

I am in the process of attaching interior trim around the window in image 1, but since the window opening is not horizontally level at the window sill, I want to fill under the trim to get it level. What type of mortar or adhesive can I use here?

 

[Krilleohrnis]

Hello, I have a house with a basement originally from 1946, but due to an extension and a later repair associated with a door replacement, there seem to be 3 different types of concrete in the basement. Wondering what these concrete types are? Image 1) Extension? Image 2) Repair on the right?

I am working on attaching the interior trim around the window in image 1, but since the window opening is not level with the window sill, I want to fill under the trim to get it level. What type of mortar or adhesive can I use here?

It's not concrete, it's mortar. You can use a C-mortar and plaster mortar.
I think you mean to get the reveal level and not the trim; it's easier to place something in between than to work with mortar. Trim is installed after the reveal.
In image 2, it looks like lightweight concrete blocks on the left, concrete hollow blocks on the right, and lecablock on top.