cement
High performance Roman cement and concrete, high durable buildings
The Coliseo, Rome, 2nd C. AD (left) The Pantheon, Rome, 2nd C. AD, inside (center) The Pantheon, Rome, 2nd C. AD, the concrete dome (right). Concrete experts talk today about how to make concrete durable. Many ancient Roman concrete buildings are still in use after more than 2000 years. For these modern concrete experts, the [...]
Papers dedicated to archaeology in Geopolymer Proceedings
Brief summary of the papers dedicated to archaeology and published in the Geopolymer Proceedings : Geopolymer 2005 and Geeopolymer ‘99 Geopolymer 2005 Synthetic stone in Ancient Egypt and Mesopotamia manufacture of synthetic lava and synthetic basalt and decipherment of the C-14 Irtysen Stele (2000 B.C.) The C-14 Irtysen Stele dating 2.000 BC (Louvre Museum, Paris) [...]
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 [...]
Geopolymer cement
There is often confusion between the meaning of the terms “cement” and “concrete”. A cement is a binder whereas concrete is the composite material resulting from the addition of cement to stone aggregates. Cement is sold to companies that make concrete. Geopolymer cement is often mixed up with alkali-activated slag developed since 1956 in Eastern [...]
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. [...]
Geopolymer cement for storage of toxic and radioactive wastes
GEOpolymeric Cements for Innocuous Stabilisation of Toxic EleMents Geosynthesis of Rock-based Geopolymer cements was the objective of the European multidisciplinary BriteEuram industrial research project GEOCISTEM. The project titled cost effective GEOpolymeric Cements for Innocuous Stabilization of Toxic EleMents, in short GEOCISTEM, started on Jan. 1994 and has been completed on June 1997. In J. Davidovits’ [...]
Water reducing agent
Geopolymer combines the merits of cement and ceramics, we can make materials with the properties of ceramics by a process like cement. Water reducing agents are popular in cement industry. The question is what will happen in geopolymer? Experiences carried out with geopolymer cements show good results with regular water reducing agents used for Portland [...]
Pyramid: Cement and Concrete expert agrees!
My name is Prof. Mario Collepardi and I am a professor of “Materials Science and Technology” at the Politecnico of Milan, Italy. Yesterday I have seen your interview by Mr. Giacobbo at the “Stargate” program on “La 7″ Italian TV channel. I am very interested to your theory about the building technique used by Egyptians [...]
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 [...]
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 [...]
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