Thor, or should that be Zeus?

[Chaz]

...seems to be a lot of water.
In my work place we add circa 30 litres of water to 750kg of mix (all depends how wet is the sand).
This gives nice mix to form roof tiles. 10% water too much and mix is too wet and have to be dump - happens daily.
My point is to get correct amount of water - mix it well and we shall get strong cement.

Really? I was under the impression this was a fairly dry mix. Without the plastisizer it wont even bond.