A new concrete manufacturing technique extracts carbon dioxide out of the air, or directly out of industrial exhaust pipes, and turns it into synthetic limestone.
With cement manufacturing responsible for 4% to 8% of the world’s carbon dioxide emissions, this breakthrough could be a significant development in the effort to reduce greenhouse gas. Consider that the pace of construction worldwide has been robust, particularly in China, in recent years. And, cement production worldwide could grow 23% by 2050.
Portland cement is made with limestone that is quarried and then heated to high temperatures, an energy-intensive process that releases huge amounts of carbon dioxide. The new technique, which has already been demonstrated in California, could not only slow the advance of climate change, but actually help to reverse it.
The inventor was inspired by how coral transform minerals in seawater to a shell-like substance. The “low-energy mineralization” technique he developed turns captured CO2 into calcium carbonate, the material synthesized by coral.
Related Stories
| Nov 10, 2011
California seismic codes spur flurry of hospital projects
New seismic requirements in California are helping to drive a flurry of new projects and retrofits in the state’s health care sector.
| Nov 10, 2011
Senate ready to repeal 3% withholding on government contracts
The U.S. Senate is set to approve legislation that would eliminate a law requiring federal, state, and local governments to withhold 3% of their payments to contractors and companies doing business with the government.
| Nov 10, 2011
New legislation aimed at improving energy efficiency in federal buildings
Recently introduced legislation, the “High-Performance Federal Buildings Act,” would help federal agencies save energy and money by improving building performance.
| Nov 4, 2011
CSI and ICC Evaluation Service agree to reference GreenFormat in ICC-ES Environmental Reports?
ICC-ES currently references CSI's MasterFormat and other formats in all of its evaluation reports. The MOU will add GreenFormat references.
| Nov 3, 2011
House Votes to Kill 3% Withholding Requirement; Senate Yet to Vote
The U.S. House of Representatives voted last week to repeal a 3% IRS withholding tax on businesses that do work for the government.
| Nov 3, 2011
OSHA Publishes Information on Rights and Safety
OSHA recently published new and revised information that explains workers’ and employers’ rights, as well as how to protect workers from hazards in the construction industry.
| Nov 3, 2011
Sierra Club Critical of Albuquerque Mayor’s Push to Weaken Green Code
The mayor’s plan to move to a less environmentally friendly code would mean confusion for people in the construction industry and a loss of energy efficiency and money for consumers, said Shrayas Jatkar of the Sierra Club.
| Nov 3, 2011
Lax Code Enforcement Blamed for Deaths in Turkey’s Earthquake
Despite tough safety codes approved a decade ago after earthquakes killed 18,000 people, lax enforcement led to hundreds of deaths after a recent earthquake in Turkey.
| Nov 3, 2011
International Green Construction Code Will Provide Template for Local Codes
A uniform code for green construction is being readied for publication in March.
| Oct 31, 2011
NIST issues new code requirements
Buildings taller than 420 feet are now required to include an extra exit stairwell or a specially designed elevator that occupants can use for evacuations.
