Check out a step-by-step guide to material creation by Emre Karabacak that goes over the process of generating a concrete tile material in Substance.
Here goes the guide:
Before starting any project, it’s always essential to first have a game plan and know how and where your material will be used. In this case we’ll be importing the resulting texture maps into Marmoset Toolbag and plugging everything into an Unreal Engine 4 PBR shader.
We’ll need the following texture maps:
And here is the second part of the guide that focuses on creating a new shader in Marmoset Toolbag: