Keyword: geopolymerization

Brevity: Headers | « Text »
  • Scientists create living concrete from bacteria and sand

    01/16/2020 9:20:20 AM PST · by BenLurkin · 35 replies
    Advanced Scoence News ^ | 01/16/2020 | Victoria Corless
    The team used a 3D sand–hydrogel scaffold that they inoculated with Synechococcus sp. PCC 7002 (Synechococcus) — a photosynthetic cyanobacterium that converts CO2 to sugars during photosynthesis. Cyanobacteria are well known to survive extreme environmental conditions, including high and low temperature, salinity, and humidity, making them ideal candidates for living materials. These new materials are also capable of being regenerated from one parent “brick” using temperature and humidity switches. This corresponds to cycles of incubation at 37 °C, followed by low-temperature storage, where the gelatin matrix solidifies and encapsulates the bacteria. Splitting one brick in half and extending its shape...
  • Artificial Pyramid Casing Stones: Ancient Geopolymer High Technology ???

    12/09/2019 5:43:12 PM PST · by wildbill · 33 replies
    Ancient Architects ^ | 12/20/2017 | Brian Forester
    This video continues our study of ancient construction techniques. It presents the argument that the base casing stones of the most familiar pyramids may have been molded by some technology which used geopolymers (stone slurry?) This is similar to the speculation that the Incan stone walls were constructed using a similar process.
  • A New Hyposthesis: How did they build the Peruvian stone walls

    12/09/2019 5:07:55 PM PST · by wildbill · 38 replies
    Ancient Architects ^ | Brien Forrester
    A video on a hypothesis that the Inca stone walls in Peru were actually constructed by using a stone slurry packed into containers and hardened by fire/ This is a follow up to the previous thread about technology needed to cut precision stonework for the Egyptian pyramids and monuments. It hypothesizes a new theory of building neolithic stoneworks with techniques that are still used today, albeit in much smaller adobe structures.
  • Science reveals improvements in Roman building techniques

    10/30/2019 12:51:32 PM PDT · by SunkenCiv · 26 replies
    Bright Surf ^ | October 25, 2019 | from E Boccalon, F Rosi, M Vagnini, A Romani
    The Romans were some of the most sophisticated builders of the ancient world. Over the centuries, they adopted an increasingly advanced set of materials and technologies to create their famous structures. To distinguish the time periods over which these improvements took place, historians and archaeologists typically measure the colours, shapes and consistencies of the bricks and mortar used by the Romans, along with historical sources. In new research published in EPJ Plus, Francesca Rosi and colleagues at the Italian National Research Council improved on these techniques through scientific analysis of the materials used to build the Roman Forum's Atrium Vestae....
  • Melting Stone with Plants? Was the mythical 'green chisel' a real tool of the Ancients?

    07/02/2019 1:00:19 PM PDT · by wildbill · 37 replies
    Ancient Origens ^ | 6/26/19 | Lisa Mangoline
    rchaeology is not an exact science. It is full of doubts, uncertainties, surprises, and unanswered questions. One of its unsolved mysteries concerns the methods of ancient stone work, which is lost in the mists of time... To this technological enigma, excluding fanciful speculations, I intend to offer an explanation in line with ‘ Occam's razor ’: with all factors being equal, the solution to a problem is the simplest one. Using Acid to Work the Hardest Stones The thesis is that the only practical system available to act on the mentioned minerals, refractory to (or unmanageable by) physical action, was...
  • Researchers Made 3,900-Pound Boulders They Can Move by Hand, Giving More Insights Into Ancient...

    04/24/2019 6:49:28 AM PDT · by BenLurkin · 22 replies
    Gizmodo ^ | 04/17/2019 | Andrew Liszewski
    Matter Design (which was co-founded by Brandon Clifford, who’s also an assistant professor at MIT) worked with CEMEX, a company that specializes in building materials, to design a series of over-sized concrete monoliths that could be assembled like giant building blocks into a larger, functional structure. But despite weighing many tons a piece and being durable enough to survive hundreds of years, the concrete blocks feature unique makeups and shapes that make them relatively easy to move, even by just a single person. There’s a couple of different design approaches at work here. The blocks, which are also known as...
  • This 4,500-Year-Old Ramp Contraption May Have Been Used to Build Egypt's Great Pyramid

    11/01/2018 7:37:06 AM PDT · by ETL · 43 replies
    LiveScience.com<br> ^ | Oct 31, 2018 | Owen Jarus, Live Science Contributor
    Archaeologists have long wondered exactly how the ancient Egyptians constructed the world's biggest pyramid, the Great Pyramid. Now, they may have discovered the system used to haul massive stone blocks into place some 4,500 years ago. They discovered the remains of this system at the site of Hatnub, an ancient quarry in the Eastern Desert of Egypt. The contraption would have been used to transport heavy alabaster stones up a steep ramp, according to the archaeologists working at the site, from the Institut français d'archéologie orientale (French Institute for Oriental Archaeology)in Cairo and from the University of Liverpool in England....
  • Paleomagnetism Study Supports Pyramid Man-Made Stone

    02/19/2018 7:14:43 AM PST · by SunkenCiv · 42 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...
  • Mysterious Inscription on the Great Pyramid

    01/29/2005 9:57:01 PM PST · by SunkenCiv · 128 replies · 2,172+ views
    RobertSchoch.net ^ | 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.&#8212;A new type of fiber-reinforced bendable concrete will be used for the first time in Michigan this summer&#8212;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
    physorg.com ^ | 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...