To revisit and clarify for those who don’t know, since there is some misinformation out there on the net by people without first hand knowledge.
Rammed Earth is: A wall made of compacted layers of mixed gravel, sand,silt and clay that is hard as rock. It can have insulation inside the wall and/or be stabilized with some lime or cement like the walls we make. When we say clay it is not like pottery clay but instead it is finely distributed and only makes up around 15% of the mixture, not noticeable to most people.
The above definition is more or less the same mixture that has been used for 10,000 years for quality structural walls. Some people write about or experiment with packing mud or some other mixture that no professional builder anywhere in the world would use. So anybody can put some type of earth in forms and ram it and can call it whatever they want but it is important to understand the difference between that and what building professionals, engineers and most people call rammed earth. Rammed earth is a high performance structural wall system that can handle earthquakes, rain, snow etc, and it’s built to last. Learn more about insulated rammed earth.