I have a good quantity of coarse sand left over from laying a flagstone path. Can I use it either instead of building sand for my mortar or as part of the sand mix? I am using it to lay concrete blocks and the look is of no consequence.
If you mix it around 50/50 with building sand it will be ok. Be careful witth the plasticiser as it will turn to slush pretty quick. Dries out pretty fast too.
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