Rammed Earth: An Environmentally Friendly Solution For Home Building
http://www.earthstructures.com.au/rammed-earth-construction/ What exactly is rammed earth? This construction material is a mix, or cross-grade, of soils that is rammed against a finished plywood structure which sorts the foundation of the home or even building. Ramming is done by hand or by machine; after securely packing the soil, a stable wall is created. For more info visit the link above.