Calcium carbonate

Basics

• Also known as Lime (Chemical)
• Is turned into Calcium oxide in a Lime Kiln or in OSE's case a Biochar-Lime Co-production System or a Open Source Lime Kiln, and is thus an important precursor to cement and thus concrete

Sources

Limestone

• Abundant yet nonrenewable

Shells

• Eggshels, Marine Animal Shells, and Snail Shells are all possible sources
• Bioleaching using the intentional farming of shelled marine life (Mussels, etc) is a possible route to explore

See Also

• Calcium oxide
• Lime Kiln
• Cement

Useful Links

• The Wikipedia Page on Calcium carbonate