Requirement Cement vs. Offer Earth Crust
Element Typical for Average earth cement (%) crust (%)
Ca 46 4
Si 10 28
Al 3 8
Fe 3 5
Requirement Cement vs. Offer Earth Crust
Element Typical for Average earth cement (%) crust (%)
Ca 46 4
Si 10 28
Al 3 8
Fe 3 5