Some aircrete have some sand, but most it's just detergent foam (veru tick) and poortland cement
Quote:
Originally Posted by freebeard
All Darc — Concrete contains gravel-sized rock and sand. Mortar contains sand. There're three grades below rock: sand, silt and clay; and one of the means of greening deserts is clay that has been blasted by sound waves into nano-scale particles. Then there are other admixtures, like plastic vacuum miicro-bubbles or cork dust. So the cement can be mixed with more than air bubbles.
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