News tagged with concrete
Technique enables mass production of custom concrete building components from digital designs
Like other professionals, architects have used computer-aided design (CAD) software in their work for decades. Typically, the resulting digital files are converted to hard-copy plans, which are then used to ...
May 16, 2012 |
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Cultivating a cure for concrete cancer
'Self-healing' concrete is being developed by researchers at Northumbria University which could see cracks in concrete buildings become a thing of the past.
May 01, 2012 |
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Smart bridges: Engineers load new bridge with damage-detection gauges
The new bridge over the Iowa River near downtown Iowa Falls is a major upgrade over the 1928 concrete arch structure it replaced last fall, once the longest arch span bridge in the state.
Apr 24, 2012 |
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The first seconds in a building's life: X-ray diffraction studies of cement hydration on the millisecond scale
(Phys.org) -- No matter if it is a giant complex, a high-rise, or an underground project, modern architecture cannot get along without concrete. The component in concrete that holds the other components together ...
Chemistry / Analytical Chemistry
Apr 23, 2012 |
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Bridges get a quick check-up with new imaging technique
Swiss engineers have developed a new imaging technique that lets them see the insides of massive concrete bridges. Much like a sonogram, this technique provides quick, easy-to-interpret images, so that the ...
Apr 18, 2012 |
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Recipe for success: Recycled glass and cement
(PhysOrg.com) -- Michigan State University researchers have found that by mixing ground waste glass into the cement that is used to make concrete, the concrete is stronger, more durable and more resistant ...
Feb 21, 2012 |
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Smart paint could revolutionize structural safety
An innovative low-cost smart paint that can detect microscopic faults in wind turbines, mines and bridges before structural damage occurs is being developed by researchers at the University of Strathclyde ...
Jan 30, 2012 |
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Scientists pioneer new concrete corrosion sensors
Scientists at Queen's University Belfast have made a major breakthrough in developing sensors which dramatically improve the ability to spot early warning signs of corrosion in concrete.
Jan 25, 2012 |
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Diamonds and dust for better cement
(PhysOrg.com) -- It's no surprise that humans the world over use more water, by volume, than any other material. But in second place, at over 17 billion tons consumed each year, comes concrete made with Portland ...
Dec 12, 2011 |
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Studying how skyscraper foundations stand up to earthquakes
UC Davis engineers are preparing to conduct the first rigorous tests of how the steel columns that secure skyscrapers to their foundations stand up during earthquakes, research that could make the towering structures safer ...
Dec 06, 2011 |
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Japan nuclear meltdown 'maybe worse than thought'
Molten nuclear fuel at Japan's Fukushima plant might have eaten two thirds of the way through a concrete containment base, its operator said, citing a new simulation of the extent of the March disaster.
Dec 01, 2011 |
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Engineers simulate large quake on curved bridge (w/ video)
Six full-size pickup trucks took a wild ride on a 16-foot-high steel bridge when it shook violently in a series of never-before-conducted experiments to investigate the seismic behavior of a curved bridge ...
Sep 23, 2011 |
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Rapidly rescuing those trapped beneath concrete
When the twin towers collapsed on September 11, 2011, one of the most critical challenges that first responders faced was cutting through concrete to get to victims trapped under debris – a painful and ...
Sep 21, 2011 |
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Improved buildings could make a big dent in climate change
The construction and operation of buildings accounts for approximately 40 percent of all U.S. emissions of greenhouse gases. The most-used building material in the world, concrete, is used to construct many of the nation’s ...
Technology / Energy & Green Tech
Aug 31, 2011 |
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Paving the way to greenhouse gas reductions
Concrete is one of the most extensively used materials worldwide -- on average, more than two tons per year of the rock-like stuff is produced for every man, woman and child on Earth, making its use second only to water. ...
Aug 29, 2011 |
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Concrete
Concrete is a construction material composed of cement (commonly Portland cement) as well as other cementitious materials such as fly ash and slag cement, aggregate (generally a coarse aggregate such as gravel, limestone, or granite, plus a fine aggregate such as sand), water, and chemical admixtures. The word concrete comes from the Latin word "concretus" (meaning compact or condensed), the past participle of "concresco", from "com-" (together) and "cresco" (to grow).
Concrete solidifies and hardens after mixing with water and placement due to a chemical process known as hydration. The water reacts with the cement, which bonds the other components together, eventually creating a stone-like material. Concrete is used to make pavements, architectural structures, foundations, motorways/roads, bridges/overpasses, parking structures, brick/block walls and footings for gates, fences and poles.
Concrete is used more than any other man-made material in the world. As of 2006, about 7.5 cubic kilometres of concrete are made each year—more than one cubic metre for every person on Earth. Concrete powers a US $35-billion industry which employs more than two million workers in the United States alone.[citation needed] More than 55,000 miles (89,000 km) of highways in the United States are paved with this material. Reinforced concrete and prestressed concrete are the most widely used modern kinds of concrete functional extensions.
For more information about Concrete, read the full article at
Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
