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It’s well known that the production of cement—the world’s leading construction material—is a major source of greenhouse gas emissions, accounting for about 8 percent of all such releases...A team of researchers at MIT has come up with a new way of manufacturing the material that could eliminate these emissions altogether, and could even make some other useful products in the process. — MIT News
The research team is exploring the "idea of using an electrochemical process to replace the current fossil-fuel-dependent system" that relies on coal-fired ovens to convert limestone, clay, and sand to Portland cement. Through the new process, the need to burn coal will be avoided and the emitted... View full entry
Cement is everywhere, but few notice the impact it has on the environment. A standard building material used everywhere, it is often confused with concrete. Cement is a key component in making concrete. By burning limestone at extremely high temperatures, this process turns the stone into a... View full entry
According to the CDP report, the cement industry is the second-largest industrial emitter of carbon after the steel industry. And when accounting for its use in human-made structures, it is responsible for more than a third of the world’s carbon emissions. But unlike the transportation sector, in which a new type of fuel can dramatically decrease the sector’s pollutants, cement’s problem is, well, cemented in its formulation [...] — The Outline
In his longform piece for The Outline, Mike Disabato explains why the cement industry shows little interest in earnestly reducing the tremendous environmental impact of its (nearly) indispensable product. "No one in the cement industry has seriously engaged in the herculean task of enhancing the... View full entry
Since 2008, Solidia Technologies [...] has been quietly developing a new cement-making process that produces up to 70% fewer CO2 emissions at a cost that DeCristofaro claims is on par with or better than conventional cement.
Solidia, which was formed in a bid to commercialize ideas developed at Rutgers University in New Jersey, is not the first company to attempt to make environmentally friendly cement. But industry experts say it’s the most promising yet.
— Quartz
"Of course, the startup now needs to show that this lower-emission cement can be made into concrete that’s at least as good as others, and can be scaled up in a way that’s affordable," Quartz explains. "That’s what Solidia is working on right now." View full entry
A scientist in Mexico has created glowing cement that absorbs solar energy during the day and emits light after sun-down.
Claiming the engineered cement can last a hundred years, he says it could make roads and structures glow in the dark, cutting the cost of street-lighting.
The patent is the first for Mexico’s University of San Nicolas Hidalgo, says the researcher behind the invention, Dr. José Carlos Rubio, according to Investigación y Desarrollo.
— globalconstructionreview.com
Related stories in the Archinect news:Upcycling CO2 into a concrete competitorGreg Lynn: The future of glue in architecture is brightHow to turn Martian soil into concrete View full entry
[UCLA's team of interdisciplinary researchers'] plan would be to create a closed-loop process: capturing carbon from power plant smokestacks and using it to create a new building material — CO2NCRETE — that would be fabricated using 3D printers. [...]
“We can demonstrate a process where we take lime and combine it with carbon dioxide to produce a cement-like material ... We’re trying to develop a process solution, an integrated technology which goes right from CO2 to a finished product."
— luskin.ucla.edu
Related on Archinect:Could this revolutionary new material replace concrete?Bacteria-laden concrete helps cracks fix themselvesGetty awards over $1.75 million to fix crappy concrete in "Important Modern Buildings"Ten Top Images on Archinect's "Concrete" Pinterest BoardChina used more cement in... View full entry
All of America’s cement consumption during the [20th] century adds up to around 4.4 gigatons (1 gigaton is roughly 1 billion metric tons).
In comparison, China used around 6.4 gigatons of cement in the three years of 2011, 2012 and 2013 [...]
The country is urbanizing at a historic rate, much faster than the U.S. did in the 20th Century. More than 20 million Chinese relocate to cities each year, which is more people than live in downtown New York City, Los Angeles and Chicago combined.
— washingtonpost.com
