DR. DAVITOVITS ELABORATES ON CONCRETE MATERIAL USED IN BOSNIAN PYRAMIDS
Written by Prof. Joseph Davidovits
Monday, 09 February 2009
Bonjour Sam,
I read with pleasure your last news about the analysis carried out at the University in Zenica.
This confirms the first impression I got by studying the sample of concrete you gave me in Edinburgh. I was struck by the presence of pockets of what seemed to be calcined clay.
In your news dated of 03 February 2009, STONE BLOCKS FROM THE BOSNIAN PYRAMIDS ANALIZED; RESULT - ANCIENT CONCRETE, the statement by professor Muhamed Pasic from the Institute for materials, "... that poorly baked clay crushed with water possesses binding properties ...", is very important.
As you probably know, some clays, notably those based on kaolinitic make up, when calcined, or backed at moderate temperature, i.e. between 500 and 750 °C, yields a very reactive material that is called metakaolin, when pure. This material is one of the preferred reactive ingredient (among others) in our modern geopolymer technology and geopolymer concrete. It has been the basis of the best Roman cement mastered by the Roman Engineers 2000 years ago, who added to lime the backed clay called in latin "testa", translated into pot-sherd or backed clay. The result of this technology was called Opus Signinum and Opus Testacaeum and can be admired today in the Pantheon and the Coliseo, the Thermal Baths, etc. in Rome. Our knowledge about the reactivity of this moderate temperature backed clay is very young (I discovered it, 30 years ago) and I am enthusiastic in reading that it could have been used by those who built the Bosnian Pyramid of the Sun, Visoko.
But this is only one part of the story and I am sure we'll get more surprising results that will confirm the "concrete theory" despite of what Prof. Klemm wrote to Dr. Swellim (see in your news COMMENTS ON CHEMICAL SOMPOSITION OF THE STONE BLOCKS FROM THE RED PYRAMID, Tuesday, 30 December 2008), especially when he states that: "...I suspect the authors wanted to support with the nail the funny concrete story, created by J. Davidovits to power his "Pyrament" cement as a "geopolymer" already used by the ancient Egyptians ...".
You should know that Egyptologists thought that I used Egyptology and my pyramid concrete theory to make cheap publicity for the cement Pyrament that was launched in USA in the 1990 by an American Cement company.
Totally wrong and insulting. When I discussed with Prof. Klemm in 1988, at the Congress of Egyptologists, Cairo, when I visited him in Munich in 1989, I was no longer involved in this industrial application, and this cement was not known, so far. But some Egyptologists are using this poor explanation to discredit my research because they do not have any valid argument.
(I guess, Sam, you know about this feeling yourself.)
Hope to see you with pleasure soon.
PS: you may publish my mail in your news.
Joseph
-------------
Prof. Joseph Davidovits
http://www.davidovits.info
Written by Prof. Joseph Davidovits
Monday, 09 February 2009
Bonjour Sam,
I read with pleasure your last news about the analysis carried out at the University in Zenica.
This confirms the first impression I got by studying the sample of concrete you gave me in Edinburgh. I was struck by the presence of pockets of what seemed to be calcined clay.
In your news dated of 03 February 2009, STONE BLOCKS FROM THE BOSNIAN PYRAMIDS ANALIZED; RESULT - ANCIENT CONCRETE, the statement by professor Muhamed Pasic from the Institute for materials, "... that poorly baked clay crushed with water possesses binding properties ...", is very important.
As you probably know, some clays, notably those based on kaolinitic make up, when calcined, or backed at moderate temperature, i.e. between 500 and 750 °C, yields a very reactive material that is called metakaolin, when pure. This material is one of the preferred reactive ingredient (among others) in our modern geopolymer technology and geopolymer concrete. It has been the basis of the best Roman cement mastered by the Roman Engineers 2000 years ago, who added to lime the backed clay called in latin "testa", translated into pot-sherd or backed clay. The result of this technology was called Opus Signinum and Opus Testacaeum and can be admired today in the Pantheon and the Coliseo, the Thermal Baths, etc. in Rome. Our knowledge about the reactivity of this moderate temperature backed clay is very young (I discovered it, 30 years ago) and I am enthusiastic in reading that it could have been used by those who built the Bosnian Pyramid of the Sun, Visoko.
But this is only one part of the story and I am sure we'll get more surprising results that will confirm the "concrete theory" despite of what Prof. Klemm wrote to Dr. Swellim (see in your news COMMENTS ON CHEMICAL SOMPOSITION OF THE STONE BLOCKS FROM THE RED PYRAMID, Tuesday, 30 December 2008), especially when he states that: "...I suspect the authors wanted to support with the nail the funny concrete story, created by J. Davidovits to power his "Pyrament" cement as a "geopolymer" already used by the ancient Egyptians ...".
You should know that Egyptologists thought that I used Egyptology and my pyramid concrete theory to make cheap publicity for the cement Pyrament that was launched in USA in the 1990 by an American Cement company.
Totally wrong and insulting. When I discussed with Prof. Klemm in 1988, at the Congress of Egyptologists, Cairo, when I visited him in Munich in 1989, I was no longer involved in this industrial application, and this cement was not known, so far. But some Egyptologists are using this poor explanation to discredit my research because they do not have any valid argument.
(I guess, Sam, you know about this feeling yourself.)
Hope to see you with pleasure soon.
PS: you may publish my mail in your news.
Joseph
-------------
Prof. Joseph Davidovits
http://www.davidovits.info
posted by BiH Platform at 12:52 PM
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