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
| Oct 3, 2013
Arizona utility pushes for change in building codes to boost efficiency on all commercial projects
Many large construction projects in Arizona are going green by paying attention to energy efficiency, but smaller buildings that are often rented out haven't yet jumped on the bandwagon.
| Oct 3, 2013
Bipartisan energy efficiency bill stalled; may not be revived this year
The Senate spent the first two weeks of September trying to pass bipartisan energy efficiency legislation, commonly known as Shaheen-Portman (S. 1392) that would have impacted building codes.
| Oct 3, 2013
LEED credential exams will feature LEED v4 material beginning next spring
The LEED Professional Credential exams for the LEED Green Associate and LEED AP with specialty designations will feature LEED v4 material beginning in late spring 2014.
| Sep 26, 2013
Ballot period on National CAD Standards open until Oct. 13
The Ballot Comment Period to update the nation’s leading computer-aided design (CAD) standard is now open.
| Sep 26, 2013
OSHA encourages comments on respirable crystalline silica rules
The Occupational Safety and Health Administration’s proposed rulemaking for respirable crystalline silica has been published in the Federal Register.
| Sep 26, 2013
EPA’s final rule on updated ASTM standard likely to be withdrawn
The Environmental Protection Agency is expected to withdraw a direct final ruleissued in Augustregarding an ASTM standard for Phase I Environmental Site.
| Sep 26, 2013
A primer on RoofPoint green-rating system for commercial roofs
The RoofPoint green-rating system can be used to construct more energy-efficient and sustainable commercial roofs.
| Sep 26, 2013
ConsensusDocs releases updated federal subcontract to help construction firms perform federal work
The newly revised ConsensusDocs standard subcontract (ConsensusDocs 752 for federal work) will make it easier for general contractors and subcontractors to perform federal work.
| Sep 18, 2013
Proposed Boston casino development approval will depend partly on sustainability
The movement toward green building has been slow to catch on in the casino industry, but that could change with Suffolk Downs, which plans to build a $1 billion casino in Boston.
| Sep 18, 2013
Regulations could ease firefighters’ fear of roof solar panels
The local fire chief says solar panels are partly to blame after a 300,000 sf refrigerated warehouse in Delanco, N.J., burned down.