1) Concrete 2) Silicate mineral
Found on
https://www.crosswordclues.com/clue/metakaolin
Metakaolin is a dehydroxylated form of the clay mineral kaolinite. Rocks that are rich in kaolinite are known as china clay or kaolin, traditionally used in the manufacture of porcelain. The particle size of metakaolin is smaller than cement particles, but not as fine as silica fume. == Kaolinite sources == The quality and reactivity of metakaolin...
Found on
http://en.wikipedia.org/wiki/Metakaolin
No exact match found.
