Patio bed mix

[matlob]

Hi
Just about to lay a 50sqm patio
I know I should use sharp sand but I've got about half a bag of builders sand left over from a build

Could I mix this in with sharp but only a small ratio to use it up or best not too

Would use sharp but need to get rid of the building sand somehow and thought I can add to the mix slightly

so 4 sharp 1 build 1 cement?

Thanks for any help

 

[Bonni]

When I do patios, I dig out, whack in 3 inch minimum hardcore then bed the tiles/flags/Indian sandstone on 3:1 sand/cement. If block paving, then just blind the building sand out to get rid of it and screed off the sharp sand.