pykrete
/ˈpʌɪkriːt/noun
Ice to which a proportion of wood pulp or sawdust has been added to give it strength as a construction material.
Origin
1940s; earliest use found in Vidette-Messenger (Valparaiso, Indiana). Blend of the name of G. N. Pyke, British member of Combined Operations, who proposed the use of this material during the Second World War and concrete.