Thor, or should that be Zeus?

[Clive S]

1/3 rd equal parts of Cement (52.5R), Sand (Sharp Sand, 0-2mm) and Basalt Stone (6-10mm). 20% Water volume based on Cement used (so in this case, 5 litres per 1 bag of 25kg each above).

Thanks for the info are you using any SP (superplasticising) like modified polycarboxylate