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Keyword: geopolymer

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  • Paleomagnetism Study Supports Pyramid Man-Made Stone

    02/19/2018 7:14:43 AM PST · by SunkenCiv · 42 replies ^ | Friday, February 1, 2013 | Joseph Davidovits
    A recent scientific study published in the renown "Europhysics News", The Magazine of the European Physical Society, (2012), Vol. 43, number 6, described how paleomagnetism study on several pyramid stones demonstrates the validity of Davidovits' theory on the artificial nature of Egyptian pyramid stones. ...Dr. Igor Túnyi ...and Ibrahim A. El-hemaly... made the following assumption (quote from their scientific paper): Our paleomagnetic investigation of the two great Egyptian pyramids, Kufu and Khafre, is based on the assumption that if the blocks were made in situ by the geopolymer concrete technique described above, then their magnetic moments would all have been...
  • Mysterious Inscription on the Great Pyramid

    01/29/2005 9:57:01 PM PST · by SunkenCiv · 128 replies · 2,172+ views ^ | 2004 | Robert Schoch
    The inscription shown below occurs above the original entrance of the Great Pyramid.  I don't think it is original, but it could be relatively old.  If you have any idea what it may mean, I would greatly appreciate hearing from you.
  • Researcher investigates ancient geology to understand human development, climate change

    10/11/2008 2:20:11 PM PDT · by SunkenCiv · 4 replies · 264+ views
    PhysOrg ^ | Friday, October 3, 2008 | Provided by Georgia State University
    Daniel Deocampo, a Georgia State assistant professor of Geology, is investigating ancient lakes and volcanic ash to help scientists better understand the environment in which humans evolved, and eventually used ash and sediment to build infrastructure in ancient civilizations... His research into volcanic ash that formed sedimentary rocks in Italy and California helps scientists better understand the ways ancient societies, including the Romans, used rocks to create mortar and concrete that, in some cases, was actually more durable than the modern varieties. Over hundreds of years, Romans experimented with different volcanic ash layers to perfect the building materials which would...
  • U-M researchers make bendable concrete

    05/06/2005 1:46:04 AM PDT · by explodingspleen · 33 replies · 1,186+ views
    University of Michigan ^ | 04 May 2005 | Laura Bailey
    U-M researchers make bendable concrete click image to see video ANN ARBOR, Mich.—A new type of fiber-reinforced bendable concrete will be used for the first time in Michigan this summer—and University of Michigan scientists hope that their new material will find widespread use across the country. The new concrete looks like regular concrete, but is 500 times more resistant to cracking and 40 percent lighter in weight. Tiny fibers that comprise about 2 percent of the mixture's volume partly account for its performance. Also, the materials in the concrete itself are designed for maximum flexibility. Because of its long...
  • Cracking Concrete's Code

    02/15/2007 1:49:01 AM PST · by neverdem · 41 replies · 1,437+ views
    ScienceNOW Daily News ^ | 2 February 2007 | Robert F. Service
    Where can you go to see a cool example of nanotechnology? Well, just about everywhere. A new study reveals that plain old concrete, the most common human-made material on the planet, owes its properties to its nanoscale structure. Down the road, this new understanding could lead to novel forms of concrete that require less energy and CO2 to generate and might allow researchers to engineer its properties much as they have done with advanced steel alloys. Concrete isn't what comes to mind when most people think of nanomaterials. It's the oldest engineered construction material and was first used by the...
  • Key test for re-healable concrete (concrete that patches itself)

    11/03/2012 4:13:20 AM PDT · by lowbridge · 9 replies
    bbc ^ | october 30, 2012 | paul rincon
    Experimental concrete that patches up cracks by itself is to undergo outdoor testing. The concrete contains limestone-producing bacteria, which are activated by corrosive rainwater working its way into the structure. The new material could potentially increase the service life of the concrete - with considerable cost savings as a result. The work is taking place at Delft Technical University, the Netherlands. It is the brainchild of microbiologist Henk Jonkers and concrete technologist Eric Schlangen. If all goes well, Dr Jonkers says they could start the process of commercialising the system in 2-3 years.
  • Advanced Concrete Means Little Maintenance For A Century

    04/26/2014 9:53:08 AM PDT · by TurboZamboni · 58 replies
    Txchnologist ^ | 4-16-14 | Michael Keller
    new water-repellant concrete impregnated with tiny superstrong fibers promises to leave roads and bridges free of major cracks for up to 120 years. University of Wisconsin-Milwaukee civil engineers have developed a concrete mix that is durable and superhydrophobic. They call it Superhydrophobic Engineered Cementitious Composite (SECC). Preventing normally porous concrete from absorbing water means that liquid can’t get inside, freeze and cause it to crack. The concrete’s unusual characteristics, including being significantly more ductile than traditional concrete, means that cracks that do form do not propagate and cause failure. “Our architecture allows the material to withstand four times the compression...
  • Finding a new formula for concrete

    05/28/2016 11:29:45 PM PDT · by 2ndDivisionVet · 75 replies
    MIT News ^ | May 25, 2016 | Jennifer Chu
    Researchers at MIT are seeking to redesign concrete — the most widely used human-made material in the world — by following nature’s blueprints. In a paper published online in the journal Construction and Building Materials, the team contrasts cement paste — concrete’s binding ingredient — with the structure and properties of natural materials such as bones, shells, and deep-sea sponges. As the researchers observed, these biological materials are exceptionally strong and durable, thanks in part to their precise assembly of structures at multiple length scales, from the molecular to the macro, or visible, level. From their observations, the team, led...
  • Uncovering The Secrets Of The Great Pyramid

    08/29/2004 8:46:23 AM PDT · by blam · 29 replies · 1,231+ views
    IOL ^ | 8-29-2004 | Annick Benoist
    Uncovering the secrets of the Great Pyramid August 29 2004 at 01:18PM By Annick Benoist Paris - Two French amateur archaelogists this week published a book in which they claim to have located the secret burial chamber of the Pyramid of Cheops near Cairo, the largest pyramid ever built. According to the study of the Great Pyramid, a fourth, undiscovered room lies underneath its so-called Queen's chamber, and is likely to have been the burial chamber for Cheops, an Egyptian pharaoh who ruled from 2560 to 2532 BC. Cheops' final resting place has never been found despite decades of investigation...
  • French Egyptologists Defend Pyramid Theory

    09/04/2004 10:50:57 AM PDT · by wagglebee · 71 replies · 1,512+ views
    My Way News ^ | 9/4/04 | PAUL GARWOOD/AP
    CAIRO, Egypt (AP) - A pair of French Egyptologists who suspect they have found a previously unknown chamber in the Great Pyramid urged Egypt's antiquities chief to reconsider letting them test their theory by drilling new holes in the 4,600-year-old structure. Jean Yves Verd'hurt and fellow Frenchman Gilles Dormion, who has studied pyramid construction for more than 20 years, are expected to raise their views during the ninth International Congress of Egyptologists in Grenoble, France, which starts Monday. They also published a book about their theory this week. Standing in their way is Zahi Hawass, the director of Egypt's Supreme...
  • Great Pyramid May Hold Two Hidden Chambers

    02/02/2011 4:58:08 PM PST · by SunkenCiv · 56 replies · 1+ views
    Discovery News ^ | Thursday, January 27, 2011 | Content provided by AFP
    Jean-Pierre Houdin -- who was rebuffed three years ago by Egypt in his appeal for a probe into how the Pyramid was built -- said 3-D simulation and data from a U.S. egyptologist, Bob Brier, pointed to two secret chambers in the heart of the structure. The rooms would have housed furniture for use in the afterlife by the pharaoh Khufu, also known as Cheops in Greek, he told a press conference. "I am convinced there are antechambers in this pyramid. What I want is to find them," he said. In March 2007, Houdin advanced the theory that the Great...
  • Egyptologists use high-tech software to analyze construction of Great Pyramid

    10/21/2008 6:14:48 AM PDT · by Mike Fieschko · 17 replies · 1,886+ views ^ | October 21, 2008 | Sumathi Reddy and Nia-Malika Henderson
    Using cutting edge technology, Egyptologist Bob Brier of the C.W. Post Campus of Long Island University delved into the only standing wonder of the ancient world, the Great Pyramid, and uncovered the mystery behind cracks in the massive Egyptian structure, unearthing a new room along the way. Brier, French architect Jean-Pierre Houdin and a team of software specialists from Dassault Systems in Paris used 3-D modeling software to determine that the burial chamber's stone support beams cracked as final construction of the Giza wonder was near completion 4,500 years ago. The team discovered that the cracks occurred when three...
  • Architect Says Pyramid Built Inside Out

    03/31/2007 9:48:03 AM PDT · by Clintonfatigued · 38 replies · 836+ views
    AOL News ^ | March 31, 2007 | Tim Hepher
    A French architect said on Friday he had cracked a 4,500-year-old mystery surrounding Egypt's Great Pyramid, saying it was built from the inside out. Previous theories have suggested Pharaoh Khufu's tomb, the last surviving example of the seven great wonders of antiquity, was built using either a vast frontal ramp or a ramp in a corkscrew shape around the exterior to haul up the stonework. But flouting previous wisdom, Jean-Pierre Houdin said advanced 3D technology had shown the main ramp which was used to haul the massive stones to the apex was contained 10-15 meters beneath the outer skin, tracing...
  • Architect claims to solve pyramid secret

    03/30/2007 4:57:51 PM PDT · by Man50D · 55 replies · 1,094+ views
    Yahoo News ^ | March 30, 2007 | LAURENCE JOAN-GRANGE
    PARIS - A French architect claimed Friday to have uncovered the mystery about how Egypt's Great Pyramid of Khufu was built — with use of a spiral ramp to hoist huge stone blocks into place. The construction of the Great Pyramid 4,500 years ago by Khufu, a ruler also known as Cheops, has long befuddled scientists as to how its 3 million stone blocks weighing 2.5 tons each were lifted into place. Ending eight years of study on the subject, architect Jean-Pierre Houdin released his findings and a computerized 3-D mockup showing how workers would have erected the pyramid at...
  • Riddle of the Pyramids: Why De Mille didn't need all those slaves

    12/31/2001 12:33:44 PM PST · by John Farson · 103 replies · 1,263+ views
    The Observer ^ | Sunday December 30, 2001 | Paul Webster in Paris
    Like millions of tourists, from the Ancient Greeks on, the Blairs may have been victims of one of the world's oldest confidence tricks when they walked round the Pyramids on the Prime Minister's holiday trip to Egypt. To the uninitiated eye, the 2.3 million blocks of stones rising to a 146-metre peak on the 4,500-year-old Great Pyramid near Cairo look as solid as pure granite. But French architects and scientists believe they are nothing more than weathered concrete blocks, moulded on the spot, stone by stone and layer by layer, from the ground upwards. The theory, being explored by ...
  • Synchrotron probes Egyptian beads [faience]

    05/23/2010 8:51:25 PM PDT · by SunkenCiv · 6 replies · 295+ views
    Australian Broadcast Corp ^ | Tuesday, May 18, 2010 | Dani Cooper
    ...using synchrotrons to analyse the synthetic turquoise that was popular during the reign of Pharaoh Akhenaten around 1300BC. Archaeologist Dr Mark Eccleston... says Egyptian 'faience', a fine-glazed quartz ceramic of distinct turquoise colour, was a common material used in items ranging from simple beads to religious artefacts. He says while it was known that larger factories were used to produce the faience, his research has shown less prestigious pieces could also have been produced in ovens in household courtyards... "Large state industries were effectively sub-contracting labour and the household would get something in return, for example more food." ...Eccleston says...
  • Update: Return to the Great Pyramid [ Bob Brier & Jean-Pierre Houdin ]

    07/14/2009 4:59:29 AM PDT · by SunkenCiv · 51 replies · 2,315+ views
    Archaeology ^ | Volume 62 Number 4, July/August 2009 | Bob Brier
    All of the current theories -- a long, straight ramp, a ramp that corkscrewed around the outside of the pyramid, or cranelike shadoufs (used in Egypt until recently for irrigating fields) -- have serious flaws... architect Jean-Pierre Houdin and I presented a radical new theory: that blocks of stone were raised to the very top of the pyramid on an internal ramp. We gave what we felt was strong evidence for the theory, which explains a French team's microgravemetric survey in the 1980s that recorded variations in the density of the pyramid... an image from the survey may show a...
  • A new angle on pyramids: Scientists explore whether Egyptians used concrete

    05/01/2008 11:04:55 PM PDT · by SunkenCiv · 31 replies · 1,127+ views
    Boston Globe ^ | April 22, 2008 | Colin Nickerson
    At MIT, Hobbs and two colleagues teach a course called Materials in Human Experience... The MIT pyramid will contain only about 280 blocks, compared with 2.3 million in the grandest of the Great Pyramids... Hobbs describes himself as "agnostic" on the issue, but believes mainstream archeologists have been too contemptuous of work by other scientists suggesting the possibility of concrete. "The degree of hostility aimed at experimentation is disturbing," he said. "Too many big egos and too many published works may be riding on the idea that every pyramid block was carved, not cast." ...In 2006, research by Michel W....
  • Egypt's Pyramids Packed With Seashells (Not Concrete)

    05/01/2008 2:02:14 PM PDT · by blam · 43 replies · 90+ views
    Discovery Channel ^ | 5-1-2008 | Jennifer Viegas
    Egypt's Pyramids Packed With Seashells Jennifer Viegas, Discovery News Fossil-Filled April 25, 2008 -- Many of Egypt's most famous monuments, such as the Sphinx and Cheops, contain hundreds of thousands of marine fossils, most of which are fully intact and preserved in the walls of the structures, according to a new study. The study's authors suggest that the stones that make up the examined monuments at Giza plateau, Fayum and Abydos must have been carved out of natural stone since they reveal what chunks of the sea floor must have looked like over 4,000 years ago, when the buildings were...
  • Scientists Say Pyramids Could Be Concrete

    04/23/2008 1:23:56 PM PDT · by blam · 50 replies · 671+ views
    Physorg ^ | 4-23-2008 | UPI
    Scientists say pyramids could be concrete April 23, 2008 Scientists are taking a new look at Egypt's pyramids to see if some of the blocks could have been made from concrete. Linn W. Hobbs, a materials science professor at Massachusetts Institute of Technology, told The Boston Globe there is a chance ancient Egyptians could have cast the blocks from synthetic material instead of carving them from quarries. Scientists have long believed Romans were the first to use structural concrete. Undergraduates in MIT's Materials in Human Experience class are building a scale-model pyramid made of quarried limestone and blocks cast from...