Pykrete
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Pykrete is a frozen ice composite, originally made of approximately 14% sawdust or some other form of wood pulp and 86% ice by weight.
A slab of pykrete
Pykrete is made of 14% sawdust and 86% water by mass.
Construction of a pykrete-reinforced ice dome by Eindhoven University of Technology
Daytime view of the ice dome
Sawdust
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Sawdust is a by-product or waste product of woodworking operations such as sawing, sanding, milling and routing. It is composed of very small chips of wood. These operations can be performed by woodworking machinery, portable power tools or by use of hand tools. In some manufacturing industries it can be a significant fire hazard and source of occupational dust exposure.
Sawdust made with hand saw
Ogatan, Japanese charcoal briquettes made from sawdust
Sawdust vendors in Kashgar markets
Wood shavings made from a chainsaw in wet wood