“David Stone is the brains behind a new patented concrete technology known as Ferrock, based on iron carbonate and incorporating largely recycled materials to produce (around 95%)! It’s showing promising signs as an alternative to concrete and a far greener building material.
“Calera’s process for CO2 reduction involves the capture of CO2 gas from industrial emitting sources and converting the CO2 into a novel calcium carbonate cement system that’s used to make a variety of valuable products.
Natural builders strive to reduce their use of cement due to high cost and adverse environmental impacts. Sustainability conscious natural builders might use ferrocement, cement plaster or micro concrete roofing tiles which use relatively small amounts of cement, and avoid more concrete intensive materials such as concrete block. Foamed lightweight concrete is another material that could be added to the list of green building materials.