Carbon neutral concrete? They’re working on it.

A Stanford University professor and founder of an organization called Blue Planet has a vision for a new type of concrete. As reported in GreenBuildinAdivor.com, Brent Constanz, Ph.D believes that his form of concrete would transform the common building material from a major source of carbon dioxide in the atmosphere to a major remover of the gas.

The production of commonly used Portland cement creates huge quantities of CO2 as a byproduct. It is estimated that 1.6 billion tons of Portland are used annually for use in the world’s concrete, and that the production of Portland, which requires heating limestone to very high temperatures, is responsible for millions of tons of CO2 emissions. In all, approximately 8 billion tons of concrete are used each year.

cement-pouring-concrete-Portland-calcium-carbonate-limestone-carbon-dioxide-EDIWeekly
It’s estimated that about 8 billion tons of concrete are used every year, of which about 1.6 billion tons is Portland cement. Production of Portland cement is responsible for millions of tons of CO2 emissions.

Constanz and his group are working on a type of concrete that is made from calcium carbonate cement and limestone aggregate. Calcium carbonate is a naturally occurring chemical compound found in rocks and in the shells of marine organisms and snails. It is already used widely in the construction industry as an ingredient of cement. The Blue Planet researchers are hoping to produce a CarbonMix cement using calcium derived from seawater and carbon dioxide captured from power plant flue gases. The new form of cement would be carbon neutral, or even carbon negative, as it would sequester CO2 and keep it out of the atmosphere forever.

Producing concrete from CarbonMix cement would reduce carbon emissions by reducing the production of Portland cement, and by chemically sequestering the CO2 in the calcium carbonate cement.

Since the aggregate that constitutes the main component of the concrete would be limestone, which is already approved for use in highway construction and concrete engineering standards, they foresee no regulatory delay on that score.

A carbon neutral cement and concrete would be a game changer.

Did you miss this?

Other Popular Stories

  • Agreement between western provinces smooths way for pipelines
  • Latest Update on KRACK (Key Reinstallation Attack): the flaw in WPA2 protocal for WIFI systems
  • Skilled labour shortage in world oil industry: report
  • GE increasing its investment in fracking technology
  • Samsung wind farm breaks ground in SW Ontario
  • Agile robotic arm could catch space debris, falling humans
  • FCA 2020 in Canada: Chrysler 300 to be eliminated; Pacifica to be refreshed; new electric minivan “Portal” to go into production
  • 99.99% of Salt Removed from Sea Water with Innovative Nano-Filter — Important with Changing Global Weather
  • Detect lung cancer with a nanotech breathalizer? It works, four out of five times, could revolutionize cancer screening
  • Toyota celebrating 50 years in Canada with Special Edition Corolla S
  • Consumer spending drives strong GDP growth in second quarter
  • Clean technologies for mining: Green Mining's time has come
  • Swiss tech does the impossible, creates white solar panels
  • SpaceX launches Immarsat 5 F4: continuing the Elon Musk tradition of innovation with commercial payback
  • Civil Engineering Design: What it Takes to Engineer the World’s Longest Tunnels
  • Canada's prosperity at risk from disruption, lack of skilled workforce: reports
  • US resumes exports of LNG
  • Artificial leaf converts sunlight, water to fuel
  • Pilot project will use algae to recycle industrial CO2 emissions
  • Swimming Robot to Examine Damage from Japan’s Nuclear Reactor
Scroll to Top