I'm reminded of Pykrete: > Pykrete is a frozen ice composite, originally made of approximately 14% sawdust or some other form of wood pulp (such as paper) and

I'm reminded of Pykrete: > Pykrete is a frozen ice composite, originally made of approximately 14% sawdust or some other form of wood pulp (such as paper) and 86% ice by weight (6 to 1 by weight). > Pykrete features unusual properties, including a relatively slow melting rate due to its low thermal conductivity, as well as a vastly improved strength and toughness compared to ordinary ice. These physical properties can make the material comparable to concrete, as long as the material is kept frozen. > Since World War II, pykrete has remained a scientific curiosity, unexploited by research or construction of any significance. https://en.wikipedia.org/wiki/Pykrete https://en.wikipedia.org/wiki/Pykrete