AKTIVITETER

RESULTS

The Centre has developed a number of solutions that can be put directly to use by the industry, both with regards to the composition of green types of concrete, and the application of green types of concrete, and the application of green types of concrete.

Green composition of concrete
The Centre's work covers concrete for large civil structures as well as for housing. The Centre has shown that, in general, it is possible to produce green types of concrete for both applications that meet the requirements normally made for traditional concrete.

The Centre has documented that some types of concrete can be produced with a reduction in CO₂ emissions of 30% or more. This reduction in CO₂emissions can be achieved by replacing relatively large quantities of the cement with fly ash, and by using types of cement that require less energy to produce
The Centre has developed new types of concrete that reuse some of the concrete industry's own residual products, such as stone dust from the production of crushed aggregate, and concrete slurry from washing concrete mixing plants and trucks
The Centre has developed new types of concrete where it is possible to reuse residual products from other industries, such as ash from the combustion of sewage sludge and biofuels
The Centre has helped to introduce a new type of cement that leaves less impact on the environment. This is achieved by such means as using 18% renewable fuels instead of coal.

Green application of concrete
The Centre has worked with various strategies for making concrete constructions more environmentally friendly. Besides the use of green types of concrete this includes

Changes in the structural design (such as bridge decks without asphalt or moisture barrier)
The use of various operation and maintenance strategies (stainless steel or traditional black reinforcement).

The strategies help to reduce the impact on the environment throughout the service life of the construction. This has been shown by lifecycle analyses carried out by the Centre.

The effect of using different green solutions

The overall CO2-emissions for bridges built using different types of green concrete (tonnes CO2): 1 Traditional solution with black reinforcement and asphalt. 2 Stainless steel reinforcement. No asphalt on the bridge deck. 3 Stainless steel reinforcement. Green concrete with environmentally friendly cement. 4 Stainless steel reinforcement and green concrete with a high fly ash content. 5 Stainless steel reinforcement and green concrete with sewage sludge ash.