"2013-07-15T15:38:02"^^ . . "Refined, dehydroxylated form of the clay mineral kaolinite. Like other pozzolans, it will chemically react with calcium hydroxide at ordinary temperatures to form compounds possessing cementitious properties; and is used as a substitute for cement in some concrete mixtures."@en . . "2013-11-21T14:06:58"^^ . . "300386694" . "metakaolin"@en .