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
Codes and Standards | Oct 16, 2019
Cool pavement can make people hotter
Reflective coatings channel sunlight raising temperatures where pedestrians walk.
Codes and Standards | Oct 15, 2019
Utah adopts 2018 International Energy Conservation Code
Provisions include increased building envelope performance and reduced air infiltration.
Codes and Standards | Oct 14, 2019
States continue to beef up energy efficiency codes
ACEEE 50-state scorecard finds latest IECC code gaining adherents.
Codes and Standards | Oct 9, 2019
DOE releases Better Buildings Healthcare Financing Primer
Outlines financial strategies to implement energy-efficiency projects in healthcare.
Codes and Standards | Oct 8, 2019
Zero Carbon Buildings for All aims for ambitious emission reduction targets
Organization makes commitment to net zero carbon for all buildings by 2050.
Codes and Standards | Oct 7, 2019
Tailgating remains a critical building security threat, say security professionals
Few buildings provide beefed up provisions to counteract threat.
Codes and Standards | Oct 7, 2019
New seismic standard to evaluate, retrofit existing structural steel buildings open for review
AISC seeks input through Nov. 4.
Codes and Standards | Sep 27, 2019
Open source tool allows comparison of embodied carbon emissions from construction materials
Enables carbon-smart choices during material specification and procurement.
Codes and Standards | Sep 27, 2019
AIA declaration: Climate change requires ‘holistic approach’
Must address interdependencies among people, buildings, infrastructure, and the environment.
Codes and Standards | Sep 26, 2019
San Jose’s new building energy code is the most stringent among large cities
New regulations aim to make zero-emission electric buildings the norm.
