material
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 [...]
Geopolymer Cement for mitigation of Global Warming
Up to 90% reduction of CO2 Greenhouse Gas emission during cement manufacture Professor J. Davidovits started working on CO2 emissions mitigation as earlier as 1990, at PennState Materials Research Laboratory, Pennstate University, USA. Unfortunately, American Agencies (DOE and EPA) stated that this was not an important issue and both institutions declined to support research proposals. [...]
Archaeological Analogues (Roman Cements)
Long-Term Stability of Geopolymeric Materials The task LONGTERM in the GEOCISTEM project dealt with the better understanding of long-term durability. It is difficult to predict extended durability on the basis of operating experience, laboratory experimentation and prototype testing. Two thousand years are generally accepted as a sufficient amount of time to permit decay of fission [...]
LTGS Brick, low cost construction material
A low cost, easy to produce solution The geopolymer LTGS brick is an ideal construction technology for emerging countries, because it offers many characteristics that fulfils the population demands. This brick uses a very cheap material available in great quantity: lateritic clay earth. This special and abundant earth, mixed with a simple geopolymer binder is [...]
Examples of geopolymer frameworks
Geopolymerization forms aluminosilicate frameworks which are similar to those of rock-forming minerals. Yet there are major differences. At low temperature, generally below 300°C, geopolymers contain hydroxyl groups -OH as well as bounded water (so-called zeolitic water), and the structures shown in the figure below must be edited accordingly, with the exception of the sodalite framework. [...]
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 [...]
Innovation and further researches
Prof. Joseph Davidovits presents the road map for the next couple of years on geopolymer science innovation and research, at the 2nd International Congress on Ceramics, Verona, Italy, July 4th, 2008. Watch the video on Vimeo. There is a great need for innovation and therefore further research must be carried out. We have listed below [...]
#15: 30 Years of Successes and Failures in Geopolymer Applications
30 Years of Successes and Failures in Geopolymer Applications. Market Trends and Potential Breakthroughs. by Joseph Davidovits Invited Paper, Geopolymer 2002 International Conference, October 28-29, Melbourne, Australia The presentation included 30 slides describing following geopolymer applications developed since 1972 in France, Europe and USA. The Geopolymer chemistry concept was invented in 1979 with the creation [...]
#14: Geopolymeric Cross-Linking (LTGS) and Building Materials
Geopolymeric Cross-Linking (LTGS) and Building Materials Geopolymer’88 Proceedings, Vol. 1, pp. 79-88 “Réticulation Géopolymérique et Matériaux de Construction” In English: After a concise presentation of the chemical principles governing the LTGS geopolymeric cross-linking with the main mineralogical components of soils, earths and clays, the authors present their experiments for a rational use of lateritic materials. [...]
#13: Solidifaction of various radioactive waste in geopolymer and long-term stability
Solidification of various radioactive residues by géopolymère with special emphasis on long-term-stability by E. HERMANN (1), C. KUNZE (1), R. GATZWEILER (2), G.KIEßIG (2), J. DAVIDOVITS (3) (1) B.P.S. Engineering GmbH (2) WISMUT GmbH (3) Cordi-Géopolymère SA published in the Géopolymère ‘99 Proceedings, 2nd International Conference on Geopolymers Sludges containing radionuclides, toxic heavy metals and [...]
New to geopolymers? Want to learn more about this chemistry? Here is the only to place to buy at a special price a bundle comprising the book "Geopolymer Chemistry & Applications" 3rd ed. together with the video "Geopolymer for newcomers".