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Concrete slump


RichS

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Sorry, haven't a clue, as it was all specced, signed off and installed by the same company, and there's nothing on any of the paperwork I have that gives that level of detail about the concrete spec.  I'm not sure there are many who've done a DIY passive slab, which may well be why you're not getting answers.

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I suspect the slump is not relevant for small house slab type jobs, mainly because of the extra cost / hassle of measuring it.  For large commercial concrete pours where things have liabilities then that's another matter.   

 

Most folk know that a stiff mix is strong and adding too much water can weaken the mix.. 

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