Concrete, Mortar, or Portland Cement to mix with red clay ?

What would be the effect of mixing these different additives with red clay soil  ?

I want to create a hard top cover of dirt around my house where the rain runs off the roof
and on to the ground at the base of the walls and eventually seeps into my basement.

I wanted to shape the ground contour so that it slopes away from the house more and also
try to pack the dirt and make it more watertight to resist seepage  and prevent the runoff from
getting into my basement.

These are the commonly available products from a Home Depot but I have read many places
that different kinds of Lime powder may be considered as well.     I believe is already a component
in concrete and mortar anyway.   Is that correct ? ? ?  

Check soil cement:

www.google.com/search?client=ms-android-boost-us&

I would go with something other than cement. If you want to change this at all in the future you will have real tough time getting rid of it, even if it is soil cement. Have you thought about creating the slope with the existing soil, adding a plastic membrane and then adding new soil above? You could then do something less permanent like wood chip or bark as well as having better moisture prevention.

I could use a pond liner or equivalent but I would need a piece 7 feet wide and 25 feet long.   I dont know where to get something like that.
I googled soil cement and they are simply adding portland cement to the dirt or rocks.    I can do the same thing probably cheaper.