composite
US Air Force satisfied with geopolymer developments
Report from the Air Force Research Laboratory on geopolymer research and developments report project number 9. AFRL is funding and conducting cutting-edge geopolymer research. Both intramural and extramural research has led to the development of new ceramics materials that possess superior properties, leading to more cost-effective choices in the design of future Air Force (AF) [...]
Introduction: developments and applications in geopolymer
Materials for the Third Millennium Think Geopolymer and Geosynthesis! The last few years have seen spectacular technological progress in the development of geosynthesis and geopolymeric applications. New state-of-the-art materials designed with the help of geopolymerisation reactions are opening up new applications and procedures, and transforming ideas that have been taken for granted in inorganic and [...]
Fire proof, heat resistant composites
Since 1985, French and English nuclear power stations equipped theirs plants with air filters produced by Sofiltra-Camfil, a French company, in which joints and dust free sealants are made of geopolymer, providing a safety cover up to 500°C. Source: Sofiltra-Camfil patent Geopolymer insure thermal protection of industrial buildings and facilities up to 1200°C. Hüls AG [...]
Potential utilization for geopolymer composites materials
Giving Survivors More Time to Escape A carbon-epoxy aerospace composite (left) is burning while a carbon-geopolymer composite (right) still resists a 1200°C fire. When a plane crash-lands and catches fire, half the people who survive the impact may not get out in time. That is because the plastics in the cabin—the seat cushions, carpeting, walls [...]
GEO-COMPOSITE: fire resistant matrix
Fire resistant matrix materials for use in aircraft composites and cabin interior applications The Federal Aviation Administration (F.A.A.), USA, has recently initiated a research program to develop low-cost, environmentally-friendly, fire resistant matrix materials for use in aircraft composites and cabin interior applications. The flammability requirement for new materials is that they withstand a 50 kW/m2 [...]
GEOPOLY-THERM: fireproof composite panels
Geopolymer Composite Applications, Fireproof panels, Fireproof Decoration The patented GEOPOLY-THERM technology is based on the use of geopolymer binders. The effects of fires aboard vessels have been demonstrated as a result of collision between ships and ferries during peace time, and by experiences of the British Navy in the Falkland Islands and the American Navy [...]
GEO-STRUCTURE: repair and retrofit buildings with fibers
External repair and structural retrofit for aging infrastructure and aging buildings Infrastructure in the United States such as bridges are degrading due to the corrosion of steel-reinforced concrete by salty water and deicing compounds. A relatively new and little known repair method for concrete and brick structures, consists of externally bonding flexible sheets of fiber [...]
H2O, SiO2 and Al2O3 ratios
There is a clear relationship between water ratio and mechanical properties. The water is our carrier. Polycondensation happens between compounds that are soluble in water. It is the water content which determines the density of the matrix. After polycondensation, the excess of water which is not tied to the structure in the form of -OH [...]
Chemical Structure and Applications
The atomic ratio Si:Al in the poly(sialate) structure determines the properties and application fields. A low ratio Si:Al (1,2,3) initiates a 3D-Network that is very rigid. A high ratio Si:Al, higher than 15, provides polymeric character to the geopolymeric material. One third of Davidovits’ book, GEOPOLYMER Chemistry & Applications, is dedicated to applications. See the [...]
Technical Data Sheet
Technical Data Sheet for Geopolymeric cement type (Potassium, Calcium) – Poly(sialate-siloxo) / (K,Ca) – (Si-O-Al-O-Si-O-), Si:Al=2:1 Further details in Davidovits’ book, GEOPOLYMER Chemistry & Applications, Part III, Properties, Chapters 15 to 18, GEOCISTEM , GLOBAL WARMING, and also previous papers in the Geopolymer Library. Tested on standard sand mortar prisms: setting: 10 hours at -20°C [...]
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