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My dad used to make it.He could get the density down to 11-pounds/per cubic foot,versus about 130-pounds/cu- ft for conventional concrete.
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Do you know how he did it? Detergent in the mix or forced air bubbles?
My father took a 5-panel door into a room once and stripped the paint in 1/2 hour. He never told me how he did that.
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.Without freedom of speech we wouldn't know who all the idiots are. -- anonymous poster
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.Because much of what is in the published literature is nonsense,
and much of what isn’t nonsense is not in the scientific literature.
-- Sabine Hossenfelder
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