1. Pykrete Power Point Presentation by
Jacob Harris

2. Certain materials are included under the fair use exemption of the U.S. Copyright Law; Materials are included in accordance with the multimedia fair use guidelines; and Materials are restricted from further use.

3. What is Pykrete?

4. composite material made of 14% wood pulp and ice
Pykrete is
composite material made of 14% wood pulp and ice

5. Interesting Properties of Pykrete
It has a slow melting rate due to low thermal conductivity
It has an improved strength and toughness over pure ice, it is actually closer to concrete in strength
It is slightly harder to form than concrete, because it expands while freezing

6. The History of Pykrete Invented by Max Perutz??
It is named after Geoffrey Pyke. He proposed that the Royal Navy make a huge, unsinkable aircraft carrier using this material during World War II

7. Durability of Pykrete
A ship made of this material would be unsinkable; torpedoes could hit it and do little damage
It has a crush resistance of greater then 3,000 per square inch, so a one-inch column could support the weight of a typical car
The wood pulp in the material makes it extremely stable at high temperatures
If a .303 caliber bullet is fired at the material, it will penetrate only 6.5 inches

8. Comparison of Ice and Pykrete
These photos were taken on July 22, 2000 by J Gordon Holley
Both the pykrete and ice were frozen in 1 gallon milk jugs for one week. The pykrete was 10% sawdust by weight
Both were shot with a .243 rifle at 100 meters. A .243 bullet fired form 300 meters can push a 1 lb object for a distance of 1000 feet
Ice-before
Ice-after
Pykrete-before
Pykrete-after

9. Sources Wikipedia http://en.wikipedia.org/wiki/Pykrete.htm information
Nobelprize.org
Image
SWalk
Grippy and Cormo
Images and information