An Investigation of Geopolymers for Use In High Temperature Applications

This research explores the use of various geopolymer concretes at high temperatures. Geopolymer cement concretes (GCCs) do not require hydration to maintain a stable structure. This is beneficial in high temperature conditions, such as a core meltdown at a nuclear power plant or a structural fire, where dehydration of materials occurs. Geopolymer concretes synthesized with fly ash, metakaolin, ground glass, and combinations thereof are investigated. To simulate the thermal loading that exists in a core meltdown, GCCs in this study are exposed to impulses of thermal energy. To simulate the effects of a structural fire, additional specimens are subjected to at a ramped heating rate. Specimens are also subjected to thermal shock loading through quenching with water. A nondestructive surface hardness test is also developed to determine compressive strengths at high temperatures. Specimens are also exposed to molten metal to simulate corium dropping onto the materials during a core meltdown.

Author dc:creator

• Sundberg, Casey

• Alternative Energy
• Fire Safety
• Geopolymers
• High Temperatures
• Nuclear Power Plant Safety
• Thermal Loads

Language dc:language.iso

en

Handle dc:identifier.uri

http://hdl.handle.net/11299/200978

OAI identifier oai:identifier

oai:conservancy.umn.edu:11299/200978