Emissions from road construction could be halved using today’s technology

“We identified several low hanging fruits, and if we address those first, it will become easier and cheaper to make bigger emission reductions in the future,” says Ida Karlsson, PhD student at Chalmers, and participant in the Mistra Carbon Exit project.

The researchers evaluated opportunities for reducing emissions in an eight kilometre stretch of the Swedish highway 44 between Lidköping and Källby, which was finished in 2019. It was one of the Swedish Transport Agency’s first projects in which a complete climate calculation was made.

All the materials and activities involved in its construction were calculated for their total climate impact –energy and materials used in the construction and what emissions these contribute to.

“We used the contractor Skanska’s climate calculation as an input for breaking down emissions by materials and activities and then analysed how much they could be reduced. What materials are used? How are they produced? What alternatives are available, and how might those alternatives develop until 2045?” explains Ida Karlsson.

The climate calculation showed that the contractor was able to reduce emissions by 20 percent compared to the Swedish Transport Agency’s reference values. But the researchers also demonstrated that emissions could be halved with technology already available today – and completely eliminated by the year 2045.

Ida Karlsson’s research is part of the project Mistra Carbon Exit, which focuses on what are termed transformative solutions. These require both time and large investments and include, for example, production of steel, cement, concrete and asphalt without carbon dioxide emissions, as well as fossil-free or electric vehicles.

Solutions are being developed and implemented, but climate-saving technologies and choices exist already today. Ida Karlsson wants to highlight four of these:

  • Transport optimisation
  • Recycling and reuse of excavation masses, asphalt and steel
  • Material efficiency and design optimisation
  • Replacement of cement clinker as a binder in concrete

“If you were to optimise the transportation of materials, excavation masses and waste, for example, large gains could be made. We could be better at transport logistics in Sweden. In addition to transporting materials and waste to and from a road construction site, many movements also take place within projects,” she explains.

The study ‘Reaching net-zero carbon emissions in construction supply chains – Analysis of a Swedish road construction project’ was published earlier this year in the journal Renewable and Sustainable Energy Reviews, and was written by Ida Karlsson together with colleague Filip Johnsson of Chalmers and Johan Rootzén, at the Gothenburg School of Business, Economics and Law.

Ida Karlsson

PhD student, Department of Space, Earth and Environment, Chalmers University of Technology
ida.karlsson@chalmers.se
+46317726517

https://expertsvar.se/en/pressmeddelanden/emissions-from-road-construction-could…

Media Contact

Joshua Worth, Chalmers, joshua.worth@chalmers.se idw - Informationsdienst Wissenschaft

Weitere Informationen:

http://www.vr.se

Alle Nachrichten aus der Kategorie: Ecology, The Environment and Conservation

This complex theme deals primarily with interactions between organisms and the environmental factors that impact them, but to a greater extent between individual inanimate environmental factors.

innovations-report offers informative reports and articles on topics such as climate protection, landscape conservation, ecological systems, wildlife and nature parks and ecosystem efficiency and balance.

Zurück zur Startseite

Kommentare (0)

Schreib Kommentar

Neueste Beiträge

Scientists achieve higher precision weak force measurement between protons, neutrons

Through a one-of-a-kind experiment at the Department of Energy’s Oak Ridge National Laboratory, nuclear physicists have precisely measured the weak interaction between protons and neutrons. The result quantifies the weak…

High-performance single-atom catalysts for high-temperature fuel cells

Individual Pt atoms participate in catalytic reaction to faciitate the electrode process by up to 10 times. Single-atom Pt catalysts are stable at 700 degrees Celsius and expected to stimulate…

New method allows precise gene control by light

A novel optical switch makes it possible to precisely control the lifespan of genetic “copies”. These are used by the cell as building instructions for the production of proteins. The…

By continuing to use the site, you agree to the use of cookies. more information

The cookie settings on this website are set to "allow cookies" to give you the best browsing experience possible. If you continue to use this website without changing your cookie settings or you click "Accept" below then you are consenting to this.

Close