Concrete & sharp sand

10 Dec 2008
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Jersey Marine
United Kingdom
I need to create a 3 x 2 x 0.075 m concrete pad, on which a Hot Tub will be placed.
All up weight of Hot Tub including users is advised to be 2,000kg

Thinking of using typical 1:2:3 mix. (Nominally C30)
This is solid pad, not spanning any voids or similar.

After building the house I have a 1 tonne bag of lime pit sand, normally would use sharp sand, but to save cost and use up this pit sand could it be used in concrete ?
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