Just responding to person that says you can't build on it for 30 days. Concrete takes 28 days to fully cure, the thicker the concrete the longer it takes. You can actually build on it the next day, but high rise builders usually wait 2 days, if you had to wait 30 days, you would have a heck of a time building a rise. I was a bricklayer for 45 yrs in Minnesota, and we would start building on it the next day. If it is properly reinforced, it will be ok. As far as using granite in concrete here in Florida, that is BS. They use mostly a limestone aggregate. I don't believe there is any granite in Florida, besides the hardness of concrete is not determined by the aggregate, it is determined by the amount of Portland cement added to the mixture.
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