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quote:
Originally posted by Zaphod:
cement will set underwater.. it is an exothermic reaction which is why the Hoover Dam could only be build a few metre cube blocks of cement at a time to stop a huge amount of heat being released.. trust me Big Grin

Z.

I'd forgotten about that.
I mean the heat that's produced from cement.
I heard that after the fall of the Roman Empire "we" lost how to make cement. ??? Then re-discovered it.
Kev

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