National Ready Mixed Concrete Association (NRMCA) members have lowered their carbon footprint by 13% in five years, according to an association news release.
“The 13% reduction in carbon footprint is for 4,000 psi (pounds per square inch) concrete, the most frequently used concrete in the United States,” said James Bogdan, senior director, sustainability initiatives for NRMCA. “Carbon footprint reduction ranged from 8% for 2,500 psi concrete and 20% for 8,000 psi concrete.”
The reductions are mainly due to more efficient use of Portland cement, the primary binder used to make concrete. NRMCA’s performance-based specifications have helped eliminate prescriptive limits on concrete formulation such as minimum cement content and low water-to-cement ratio.
These limitations unnecessarily drive up cement content, the main contributor to carbon emissions, the release says. Some NRMCA members have lowered their carbon even more through innovation. For some applications and projects, concrete producers are incorporating technologies such as supplementary cementitious materials, low-carbon cements, and carbon capture to lower carbon footprint by 50% or more.
Related Stories
| Apr 10, 2013
Concrete Reinforcing Steel Institute accredited by ANSI as standards developer
The Concrete Reinforcing Steel Institute (CRSI) was recently accredited by the American National Standards Institute (ANSI) as an ANSI Accredited Standards Developer (ASD).
| Apr 10, 2013
DOD should continue LEED-Silver or equivalent rating standard, says NRC
The Department of Defense should continue to require that its new buildings or major renovations to facilities be designed to achieve a LEED-Silver or equivalent rating, says a new report from the National Research Council.
| Apr 10, 2013
EPA proposes emissions rules affecting light construction vehicles
The Environmental Protection Agency has proposed air-pollution standards that it says will reduce the amount of sulfur in U.S. gasoline by two-thirds and impose fleet-wide pollution limits on new vehicles.
| Apr 10, 2013
New skyscraper designs raising the bar on green standards
Though most new skyscraper designs have a traditional look, they are including a wider array of sustainable elements to use energy and water more efficiently and improve human health.
| Apr 5, 2013
Lack of national standards on design of bioterror labs creates higher risk for accidents, panel says
U.S. labs that conduct research on bioterror germs such as anthrax are at risk for accidents because they do not have uniform design and operation standards, according to a Congressional investigative group.
| Apr 5, 2013
Builders Hardware Manuf. Assn. revises three standards for hinges, locks, and latches
The Builders Hardware Manufacturers Association (BHMA) released three new revisions to the ANSI/BHMA standardsfor hinges, interconnected locks, and sliding and folding hardware.
| Apr 5, 2013
New items to ASHRAE/IES energy standard open for public comment
The 2013 version of the ANSI/ASHRAE/IES Standard 90.1-2010, Energy Standard for Buildings Except Low-Rise Residential Buildings, is scheduled for publication later this year, and 26 proposed addenda are open for public comment.
| Apr 5, 2013
No evidence that mandatory building energy labeling improves efficiency, study says
The Building Owners and Managers Association (BOMA) International and the Greater Boston Real Estate Board (GBREB) released a report, “An Economic Perspective on Building Labeling Policies,” that questions the efficacy of mandatory building energy labeling.
| Mar 27, 2013
Practical application of Legionella prevention standards the focus of ASHRAE project
An American Society of Heating, Refrigerating and Air-Conditioning Engineers committee drafting tough new standards to prevent the waterborne bacteria Legionella is focused on how to apply the standards in the real world.
| Mar 27, 2013
Open discussion of regulations on tap at AGC’s 2013 Federal Contractors Conference
The AGC Federal Contractors Conference provides a venue for contractors and federal agency personnel to meet in a collaborative forum to review federal construction contracting issues from around the United States.