Energetically modified cement
WEBAn EMC made from volcanic rocks (Luleå, Sweden, 2020). Energetically modified cements (EMCs) are a class of cements made from pozzolans ( fly ash, volcanic ash, pozzolana), silica sand, blast furnace slag, or Portland cement (or blends of these ingredients). The term "energetically modified" arises by virtue of the mechanochemistry process applied .