Joseph Davidovits

www.davidovits.info

Catégorie : News

Conferences 2016-2017

Renseignements détaillés sur les Géopolymères, allez à Institut Géopolymère
For detailed information on Geopolymers, go to Geopolymer Institute

– 2017, 04 October, Hong Kong
Public Lecture title: Geopolymers: From Theory to Global Industrialization,
at Hong Kong Science Park.

– 2017, 29 September, Tokyo, Japan
Symposium on current status and issues of geopolymer technology
in construction sector
, organized by Japan Concrete Institute. Shinagawa General Civic Hall “Curian ». My Plenary Lecture is scheduled for 15:10.   Lire la suite... / Read more...

100,000 tonnes Geopolymer Concrete: world premiere

Toowoomba, Brisbane West Wellcamp airport, Australia #Wellcamp747

Australia, October 2015.Brisbane West Wellcamp Airport (BWWA), Toowoomba, Queensland, is Australia’s first greenfield public airport to be built in 48 years. BWWA became fully operational with commercial flights operated by Qantas Link in November 2014.

30 years after my invention of Geopolymer cement in USA, at Lone Star Industries (Pyrament cement), this project marks a very significant milestone in engineering – the world’s largest geopolymer concrete project, so far. BWWA was built with approximately 40,000 m3 (100,000 tonnes) of geopolymer concrete making it the largest application of this new class of concrete in the world. The geopolymer concrete developed by the company Wagners, known as Earth Friendly Concrete (EFC), was found to be well suited for this construction method due to its high flexural tensile strength, low shrinkage and workability characteristics. Heavy duty geopolymer concrete, 435 mm thick, used for the turning node, apron and taxiway aircraft pavements, welcomes a heavy 747 cargo for regular air traffic between Toowoomba-Wellcamp BWWA airport and Hong Kong..(See the video on my visit to the Toowoomba-Wellcamp-Airport).   Lire la suite... / Read more...

Wrong statement on Pyramids of Bosnia

I wrote in my main article dedicated to the Bosnian Pyramids an update stating that: « According to our information, we believe that the sample of concrete that I have examined under the electron microscope comes from a type of cistern or water tank (the drilling report is mentioning a concrete « ceiling » and an empty space of 4 meters depth followed by a « concrete » floor, see the pdf below). The geopolymer concrete analyzed is a kind of Roman concrete, which in no way corresponds to the materials that constitute the casing of the pyramids and look like pudding stone. Consequently, the information published on the Bosnian Pyramids websites are inaccurate. » Read the entire article at Pyramids in Bosnia.   Lire la suite... / Read more...

NOVA mini-pyramid: fiasco and swindle

NOVA mini-pyramid (© J. Davidovits, 1991)

NOVA mini-pyramid (© J. Davidovits, 1991)

In recent weeks, several internet forums discuss my involvement in a documentary made in 1991 by the American channel PBS, famous for it popular science program « NOVA » and entitled This Old Pyramid. The objective of NOVA was the illustration of different techniques proposed by experts in the construction of the pyramids of Egypt. NOVA had decided to build at Giza, a mini-pyramid, according to the « old techniques ». I related my experience in several of my books: in French (Ils ont bâti les pyramides, 2002; La nouvelle histoire des pyramides, 2004 and 2006) and in English more recently (Why the Pharaohs built the Pyramids with Fake Stones, 2009). I shall make it available for the first time on the internet as a pdf file below which reproduces some pages and figures of the English edition of « Why the Pharaohs built the Pyramids with Fake Stones ». At the arrival of the television crew, including myself, the mini-pyramid was practically finished and had two of it sides convered with their casing stones, not dressed. The workers had used trucks, forklifts and steel tools for their work, the material being soft limestone quarried at Tura, on the other side of the Nile. But the use of construction equipment was not shown in the documentary « This Old Pyramid ». The casing stones are absent on the back of the mini-pyramid which was never completed, as shown in the figure above and Figure 3.14 in the pdf file, taken at the end of filming and before the big traditional festival End of construction.   Lire la suite... / Read more...

Geopolymer book in Chinese / en Chinois

Mon livre Geopolymer Chemistry and Applications en Chinois.

My book Geopolymer Chemistry and Applications has been published in Chinese by a major publisher, National Defense Industry Press, ISBN 978-7-118-07421-5, 2012.

Geopolymer Revolution on the Move

I am happy to see how Geopolymer science, which I founded 33 years ago, is generating applications and innovations dedicated to the general public. BASF, the world Chemical Company is strongly promoting geopolymer technology. In an older post posted in the Geopolymer Institute on 24 March, 2011, we introduced the geopolymer grout PCI-GEOFUG (go to BASF). Meanwhile, the company presents it at various international fairs and expositions, starting from Germany over UK, and presently in Paris, at BATIMAT (8 Nov., 2011). It is interesting to follow the arguments outlined in the company technical brochures dedicated to this geopolymer grout GEOFUG.The French text is enthusiastic. On one page (it is page 2) one sees 3 women raising both arms above their head with placards that read, translated from French:   Lire la suite... / Read more...

Revenge for ridiculed scientists: 2011 Nobel Prize in Chemistry

The revenge of the ridiculed scientists.
In September 2006, my article Publish or Perish: the disease of scientific research highlighted how the 2005 Nobel Prize winners in Medicine had been forbidden for years to publish the results of their research, simply because they contradicted what was taught in the faculties world-wide, and accepted by the majority of the scientific community at that time. The recent 2011 Nobel Prize in Chemistry, Daniel Schechtman, experienced a situation even more vexing. When in 1982, thirty years ago, he made his discovery of quasicrystals, the research institution that hosted him fired him because he « threw discredit on the University with his false science ». Why? Because he had the misfortune to make his discovery alone, without the help of other colleagues. Indeed, for the scientific authorities and institutions it is fashionable to proclaim that research is above all a team work. So that any individual discovery is suspect, subject to ridicule, worse, suspected of manipulation of results and scientific fraud.
The press release from Reuters News Agency dated of October 6, 2011 was entitled: Ridiculed crystal work wins Nobel.
I have often quoted in my books the philosopher Schopenhauer (1788-1860): the establishment of the truth passes through three stages: during the first it is ridiculed, in the second it is resisted, in the third it is considered as self evident. Daniel Schechtman has crossed the 3 steps. He was the subject of fierce resistance from one of the greatest scientists of the 20th century, Linius Pauling, Nobel Laureate in Chemistry and Peace Nobel Laureate. In 1985, he wrote: Daniel Schechtman tells non-sence. There are no quasi-crystals, there are only quasi-scientists!
Those who follow my research on geopolymer science know that I already went through the first two steps. Five to six years ago, we entered the consolidation phase, the third step. To see this, just look at the evolution of the number of scientific publications published each year on geopolymer science and applications.   Lire la suite... / Read more...

New analysis shows artificial Pyramid stone

A new scientific analysis demonstrates the artificial nature of Egyptian Pyramid stone. The article titled: « Were the casing stones of Senefru’s Bent Pyramid in Dahshour cast or carved? Multinuclear NMR evidence » was published in Materials Letters 65 (2011) 350–352, by an international team of scientists involving Kenneth J.D. MacKenzie (MacDiarmid Institute for Advanced Materials and Nanotechnology, Victoria University of Wellington, New Zealand), Mark E. Smith, Alan Wong, John V. Hanna (Department of Physics, University of Warwick, Coventry, CV4 7Al, UK), Bernard Barry (Institute of Geological and Nuclear Sciences, Lower Hutt, New Zealand) and Michel W. Barsoum (Department of Materials Science and Engineering, Drexel University, Philadelphia, PA 19104, USA).   Lire la suite... / Read more...

India (Inde) Conferences, 7-9 dec. 2010

Conferences 2011

4-6 Juillet, Saint-Quentin, France
Geopolymer Science and Archaeology
Science des Géopolymères + Archéologie

Geopolymer Camp,
Organized by the Geopolymer Institute,
International workshop on geopolymer science, technology and applications, as well as archaeology. Celebrating 32-year anniversary of the Geopolymer Institute.
Allez à (go to) GeopolymerCamp

18-20 April, Leuven, Belgium
Geopolymer Science

2nd Slag Valorisation Symposium
Organized by Department of Metallurgy and Materials Engineering of the KU Leuven (Belgium)
I am presenting a conference as Invited Speaker on Ca-based geopolymer (slag-based) on 18 April, 14:00.
Go to Slag Conference

10 mars, Paris, France
Bible: Joseph-Amenophis Fils de Hapou

conférence organisée par GenAmi l’Association de la généalogie juive,
Conférence sur mon dernier livre De cette fresque naquit la Bible
A la Maison des Associations de Paris 16e, 14 Avenue René Boylesve – 75016 Paris (Autobus 72 – Métro Passy)
à 14 heures 30 précises.
Allez à (go to) Conférence GenAmi   Lire la suite... / Read more...

Error or forgery on the Stele of Merneptah, known as Israel Stele

The objectives of this article are twofold. First of all, it presents one information omitted in Chapter 11 of my last book in French language De cette fresque naquit la Bible (The Lost Fresco and the Bible ). Then, it denounces an error, or more probably the forgery of an archaeological document of the greatest importance.

The stele of Merneptah contains the oldest mention of Israel in an extra-biblical document. Flinders Petrie discovered it in 1896, at Thebes, Egypt, in Merneptah’s mortuary temple. Merneptah was the son of Ramses II. The stele describes the military campaign undertaken in 1207 B.C. against the Libyans, and, eventually a campaign to Canaan by which a group of people named Israel would have been destroyed. One reads in lines 26 to 28 of this stele, according to the official translation: The princes are prostrate, they say: let us be in peace! Nobody any more raises the head among the Nine Arcs. Tehenu is destroyed; Khati (Hittites) are in peace; Canaan is captive like its demons, Ashkelon is conquered; Gezer is captured; Yanoam became non-existent; Israel is devastated, it does not have more seed; Kharu became the widow of Egypt. All these countries are pacified. All those, which were in revolt were subdued by the king of Egypt of North and the South…   Lire la suite... / Read more...

MIT supports my pyramid theory

The famous Massachusetts Institute of Technology, Boston, USA, is supporting my re-agglomerated stone (concrete) pyramid theory. At MIT, Professor Hobbs and two colleagues and students are experimenting the construction of a small scale pyramid using my theory.

Go to the Boston Globe article of April 22 2008 titled
A new angle on pyramids
Scientists explore whether Egyptians used concrete

Davidovits pyramid theory worldwide

The world press is commenting the study published by the French science magazine Science & Vie and the scientific paper released by the Journal of the American Ceramic Society , December 2006.

Here some links and excerpts from major English, American and German news papers

Materials Science: Concrete evidence

The scientific magazine NATURE, vol. 444, p. 793 (14 december 2006) writes in his News about the recent analysis on pyramid stones:

“Some of the massive blocks making up the great pyramids of Giza in Egypt (pictured) are not limestone, but a synthetic mix like concrete, argue materials scientists. The paper by Michel Barsoum of Drexel University in Philadelphia, Pennsylvania, and his colleagues is the latest entry in a decades-long argument. Most Egyptologists reject the idea, put forth in the mid-1980s by French chemist Joseph Davidovits, that the pyramids contain concrete. Barsoum’s team took a fresh look at 15 samples using scanning- and transmission-electron microscopes. The samples contain ratios of elements, such as calcium and magnesium, that do not exist in nearby limestone. The imaging also revealed regions of amorphous structure. Both observations suggest that other substances were added to make a concrete mix, say the authors.   Lire la suite... / Read more...

Zahi Hawass (Egypt) statement in the New York Times

It is obvious that, with his statement published on December 1, 2006, in the New York Times , Dr. Hawass, General Secretary of the Egyptian Antiquity Organisation, thought that the renowned material scientists, professors M. Barsoum, G. Hug and G. Demortier, had analyzed modern Portland cement concrete instead of the re-agglomerated (reconstituted) limestone, as claimed by Professor J. Davidovits.

This is a pure affront to the scientific integrity of these well known scholars. Will Zahi Hawass apologyse for his mistake and present his regrets? The future will tell, and I hope he’ll do it !!   Lire la suite... / Read more...

In MEMORIAM : Georges Grimal, pioneer in geopolymer sculpture art

It is with sorrow that I learned that my friend Georges Grimal died at the age of 98 years. The majority of our scientific colleagues, engineers and students, know at least one of his works of Art created with geopolymer. It is displayed on this site at the page Potential utilizations in Art and Decoration

I met with Georges Grimal in 1981. Major General of the French Air Force, he had always been interested by new developments related to aeronautic, but at the same time he cultivated his gifts as a painter and sculptor. We had just manufactured prototypes in geopolymer for the French company Marcel Dassault (the bomber Mirage 2000), when George Grimal discovered the properties of our revolutionary material. He immediately thought of employing it for his sculptures and bas-reliefs. He was very gifted for the pastel painting and his outlines out of clay revealed the same subtleties as his paintings. He learned how to make silicone moulds, then objects in geopolymer. Very soon, we created a one meter high statue, called: Europa, followed by splendid woman heads and busts, before focusing on his major work, the Dramatized Sculpture. He took an active part in our Geopolymer Conferences: 1988, 1999 and deeply regretted not to be able to attend GEOPOLYMER 2005. His concept was successfully presented at Geopolymer ‘99, and his contributions are published in the Proceedings of Geopolymer ‘88 and Geopolymer ‘99. I have decided to put in our Library for free download, therefore accessible to all, his Geopolymer ‘99 conference, entitled Dramatized Sculptures with Geopolymers   Lire la suite... / Read more...

Interview at Australian Talk Radio Network 6PR

During my stay in Perth, Australia, on the last evening of our Geopolymer Workshop (Sept. 28 -29, 2005) organized by Prof. Vijay Rangan and Curtin University of Technology, I was interviewed by the Australian Talk Radio Network, radio talkshow anchor Graham Mabury . It was an interesting talk conducted by Graham Mabury who had studied the subject and prepared his interview with care. His questions were smart and pertinent.

9 minutes, © 6PR, 2005

Dans la Presse/In der Presse/In the Press

L’Europe des géopolymères et de ses applications techniques et archéologiques, est en marche. Trois articles importants (plusieurs pages chacun) sont parus pratiquement en même temps, en Belgique, France, Allemagne et République Tchèque.

en français :
Novembre 2005: le magazine l’ÉGYPTE présente un dossier intitulé: Les preuves scientifiques du moulage des blocs de la Grande Pyramide, avec des interviews de mon collègue et ami le Prof. Guy Demortier et de moi-même.

in deutscher Sprache (en allemand) :
Januar 2006, #1/2006: Magazin ZEITGEIST
Interview: Pyramiden doch aus Naturbeton erbaut ? Weltmeister Geopolymer. Naturbeton aus dem Altertum als neuzeitliche Alternative im Umweltschutz- und Bausektor; adresse internet   Lire la suite... / Read more...

Milestones in geopolymers

Milestones in the Development of
Geopolymeric Chemistry

Excerpt from the Chemical Abstract Data Bank

1972: first patent on polycondensation of kaolinite with NaOH
TI : Sintered composite panels
AU : Davidovits J
AF : Coordination et Developpement de l’lnnovation S.A.
SO : FR72138746 721102 ; US Patent 3,950,470; US 4,028,454
KW : building panel manuf; kaolin building panel; sand building panel; resin building panel

1975: first patent on hydrosodalite Na-PS shaped articles
TI : Agglomerating compressible mineral materials in the form of powder, particles, or fibers
AU : Davidovits J
AF : Coordination et Developpement de l’lnnovation S. A.; Cordi SA Fr.
SO : Patent DE2621815- 761209;Ger.Offen.; 10pp.; FR75/17337-75O603 GB Patent 1,481,479
KW : hydrosodalite shaped article   Lire la suite... / Read more...

Extended biography

He is the author and co-author of approx. 130 publications including 50 patents issued and granted related to research dedicated to applied solid-state chemistry, geopolymeric materials.

1958: Diplome d’Ingénieur-Chimiste, Ecole Nationale Supérieure de Chimie, Rennes, France

1960: Dr. rer. nat in macromolecular chemistry, University of Mainz, Germany.

From 1962 to 1972: 10 years dedicated to research and developments dealing with organic polymers, which resulted in 19 publications involving the chemistry of poly-urethane, textile synthetic fibers, biological membranes and collagen.   Lire la suite... / Read more...

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