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Keyword: ancientconcrete

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  • Paleomagnetism Study Supports Pyramid Man-Made Stone

    02/19/2018 7:14:43 AM PST · by SunkenCiv · 43 replies
    www.davidovits.info ^ | 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...
  • 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...
  • Back to future with Roman architectural concrete

    12/19/2014 2:10:42 PM PST · by SunkenCiv · 24 replies
    Eurekalert! ^ | December 15, 2014 | Lynn Yarris
    No visit to Rome is complete without a visit to the Pantheon, Trajan's Markets, the Colosseum, or the other spectacular examples of ancient Roman concrete monuments that have stood the test of time and the elements for nearly two thousand years... Working at ALS beamline 12.3.2, a superconducting bending magnet X-ray micro-diffraction beamline, the research team studied a reproduction of Roman volcanic ash-lime mortar that had been previously subjected to fracture testing experiments at Cornell University. In the concrete walls of Trajan's Markets, constructed around 110 CE, this mortar binds cobble-sized fragments of tuff and brick. Through observing the mineralogical...
  • The Riddle of Ancient Roman Concrete

    09/02/2011 8:15:56 PM PDT · by SunkenCiv · 55 replies · 1+ views
    Roman Concrete ^ | 1993-1995 | David Moore, P.E.
    A most unusual Roman structure depicting their technical advancement is the Pantheon, a brick faced building that has withstood the ravages of weathering in near perfect condition, sitting magnificently in the business district of Rome. Perhaps its longevity is told by its purpose . . . to honor all gods. Above all, this building humbles the modern engineer not only in its artistic splendor, but also because there are no steel rods to counter the high tensile forces such as we need to hold modern concrete together. Describing this large circular building tells much of the intelligence of its builders;...
  • 'Caesar's superglue' find

    12/04/2007 6:32:34 PM PST · by BGHater · 77 replies · 196+ views
    The Scotsman ^ | 05 Dec 2007 | The Scotsman
    ARCHAEOLOGISTS in Germany have found a 2,000-year-old glue Roman warriors used to repair helmets, shields and the other accessories of battle. "Caesar's superglue" - as it has been dubbed by workers at the Rhine State Museum in Bonn - was found on a helmet at a site near Xanthen on the Rhine River where Romans settled before Christ. Frank Welker, a restorer at the museum, said: "We found the parade cavalry helmet had been repaired with an adhesive that was still doing its job. "This is rightly called some kind of superglue because air, water and time have not diminished...
  • Volcanic ash may have preserved Roman ruins (Good cement)

    05/14/2009 3:15:11 AM PDT · by decimon · 23 replies · 901+ views
    Discovery ^ | May 13, 2009 | Rossella Lorenzi
    Sandy ash produced by a volcano that erupted 456,000 years ago might have helped a huge ancient Roman complex survive intact for nearly 2,000 years despite three earthquakes, according to research presented last week in Rome. X-ray analysis of a wall sample from the Trajan's Market ruins in Rome showed that the mortars used by ancient Romans contained stratlingite, a mineral known to strengthen modern cements. "It is the first time that stratlingite is recognized in ancient mortars," Lucrezia Ungaro, the Trajan Forum archaeological chief, told Discovery News. "This is amazing, and shows the technical expertise of Roman builders."
  • 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...
  • Ancient Rome's Earliest Temple Reconstructed

    03/15/2008 5:26:40 PM PDT · by blam · 25 replies · 1,633+ views
    National Geographic News ^ | Ancient Rome's Earliest Temple Reconstructed
    Ancient Rome's Earliest Temple Reconstructed Sara Goudarzi for National Geographic NewsMarch 14, 2008 Experts have digitally reconstructed Rome's earliest major temple, the Temple of Apollo, built by the first Roman emperor, Augustus. The temple dates to 28 B.C., and its ruins stand adjacent to the emperor's imperial palaces on the city's famous Palatine Hill. Until now the original design of the temple had not been well understood, partly due to the ruins' poor state of preservation. Also, previous efforts to model the temple had been based on outdated historical assessments rather than on the ruins themselves. Stephan Zink, a graduate...
  • Research team recreates ancient underwater concrete technology

    04/09/2005 4:19:02 AM PDT · by Mike Fieschko · 20 replies · 738+ views
    PhysOrg.com ^ | Apr 7, 2005 | unknown
    Research team recreates ancient underwater concrete technology A University of Colorado at Boulder professor and his colleagues have taken a page from the writings of an ancient Roman architect and built an underwater concrete pier in the manner of those set in the Mediterranean Sea 2,000 years ago. CU-Boulder history Professor Robert Hohlfelder, an internationally known underwater archaeologist, said scholars have long been in awe of the engineering feats of the early Romans. A former co-director of the international Caesarea Ancient Harbor Excavation Project, he said the research effort was spurred by the stunning hydraulic concrete efforts undertaken at...
  • To improve today’s concrete, do as the Romans did

    06/05/2013 9:16:34 AM PDT · by Renfield · 45 replies
    Berkeley (Univ) News ^ | 6-4-2013 | Sarah Yang
    In a quest to make concrete more durable and sustainable, an international team of geologists and engineers has found inspiration in the ancient Romans, whose massive concrete structures have withstood the elements for more than 2,000 years.Sample of ancient Roman maritime concrete from Pozzuoli Bay near Naples, Italy. Its diameter is 9 centimeters, and it is composed of mortar formulated from lime, volcanic ash and chunks of volcanic tuff. (Carol Hagen photo) Using the Advanced Light Source at Lawrence Berkeley National Laboratory (Berkeley Lab), a research team from the University of California, Berkeley, examined the fine-scale structure of Roman concrete....