Re: TIP: Mixing Vermiculite Concrete Wiley,
I had so many bags of vermiculite that I wasn't really keeping count when making the oven complex, but I starting getting concerned about quantity when doing the pool bottom. About Halfway through, I figured I was getting about 3 cubic feet out of a bag and had to adjust my depth accordingly to make sure that what I had covered the area. Then at the end, I ended up with 7 bags left over, so thought that maybe they were about 3 & 1/2 feet.
I noticed they were actually packed by weight and not by volume... I think there is a lot of settling, plus the act of mixing compresses out the air spaces...
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