Researchers from Western University, Indiana University, and Washington State University published a new paper in the Journal of Marketing that uses the idea of psychological distance as a way to leverage qualities of existing ...
Economics & Business
1 hour ago
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2
A rare mineral that has allowed Roman concrete marine barriers to survive for more than 2,000 years has been found in the thick concrete walls of a decommissioned nuclear power plant in Japan. The formation of aluminous tobermorite ...
Materials Science
Jan 11, 2021
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117
Results of a new five-year study of recycled concrete show that it performs as well, and in several cases even better, than conventional concrete.
Materials Science
Nov 30, 2020
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Researchers from the South Asia Institute and the Heidelberg Center for the Environment of Ruperto Carola investigated the causes of a glacial lake outburst with subsequent flooding in the Ladakh region of India. In order ...
Earth Sciences
Nov 02, 2020
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A new method of connecting precast beams and columns will make it possible to quickly repair concrete buildings damaged by extreme events such as earthquakes and hurricanes.
Materials Science
Oct 05, 2020
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Hurricane Paulette made a rare landfall in Bermuda Monday and strengthened into a Category 2 storm just hours after the wealthy British territory shuttered schools, government agencies and air and sea ports.
Environment
Sep 14, 2020
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9
Geophysicists at Ludwig-Maximilians Universitaet (LMU) in Munich have measured Earth's spin and axis orientation with a novel ring laser, and provided the most precise determination of these parameters yet achieved by a ground-based ...
Earth Sciences
Jul 20, 2020
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7
There's a lot the average person doesn't know about concrete. For example, it's porous; it's the world's most-used material after water; and, perhaps most fundamentally, it's not cement.
Materials Science
Apr 06, 2020
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370
Building materials that clean themselves could save immense time and labor in homes and businesses, as well as reduce disease risk in settings such as hospitals. Now, researchers reporting in ACS Applied Materials & Interfaces ...
Materials Science
Nov 20, 2019
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The next generation of ultra high-performance fiber-reinforced concrete (UHPFRC) has just been created at EPFL. The new material will be used to strengthen and to extend the life span of bridges and other structures—both ...
Materials Science
Nov 13, 2019
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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.
This text uses material from Wikipedia, licensed under CC BY-SA
