slabs havent stuck
yester I laid down my patio slabs with a mixture of 3 parts building sand to 1 part concrete. I made the mixture not too sloppy and basically could make a snowball out of it without it falling apart.
today I went to see how they had set and they seem pretty solid however, I tried to move a couple of the slabs with my finger tips from underneath and they came up. So my question is why haven't they stuck and what have I done wrong?