Porcelain tiles potentially over weight limit: is this a big issue?

[Poiup]

Without thinking too much about it we bought these tiles, and now I realize we might have made a mistake:

Maddox Grey Concrete Effect Porcelain Wall and Floor Tile | TileMountain

Achieve an industrial-chic look with Maddox Grey Concrete Effect Matt Porcelain Wall and Floor Tile. Stylish and contemporary.

www.tilemountain.co.uk

I am going to use them to tile the splashback of my kitchen. Right now there are small ceramic tiles, which I will remove and replace with the new ones.
The wall is a party wall (masonry) and I assume is plastered... which I've just figured might be a big problem.
If I got it right, the weight limit for plastered walls is 20kg/m2, my tiles should be 20.6kg/m2 excluding grout and adhesive (so probably around 23-24kg/m2 in total?)

For the adhesive I was thinking about using the Mapei Keraquick Wall & Floor Rapid-Set Flexible.

Is that going to be a huge problem? I am not tiling the whole wall, the highest I will go is 75cm behind the cooker and about 48 in the rest of the wall. Is this really likely to be an inssue?

 

[ree]

OP,
In terms of fixing the new tiles - no, it shouldn't be an issue provided the back ground is prepped, & you butter the background & comb the tile back.
Use a basic powdered thin set adhesive.
Such large tiles used as a back splash might look odd but you would get used to it.