How to fill floor gap?

[veedee]

Between front door and porch door, i have some tiles.

But to the side of the tiles is a gap of about 50mm.

What can i use to fill/smooth the area to get it level with the tiles?

I do have ballast, cement and sand lying around if that helps

 

[blup]

That helps

Blup

 

[veedee]

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