Concrete with low CO2 emissions through the use of CNC.
| Reference number | |
| Coordinator | RISE Research Institutes of Sweden AB - CBI Betonginstitutet |
| Funding from Vinnova | SEK 340 650 |
| Project duration | August 2019 - January 2020 |
| Status | Completed |
| Venture | Circular and biobased economy |
| Call | Increased resource efficiency through circular economy |
Important results from the project
The motive for this project is to reduce CO2 emissions that occur as a result of the cement and concrete manufacturing process through the use of existing products alternative circular waste material from the paper and pulp industry.
Expected long term effects
Results show that nanocrystalline cellulose in concrete has an effect by controlling the viscous properties of the fresh cement mix. By controlling the concrete´s water-retaining stabilizing capacity and/or protecting the reinforcing rebars with existing products alternative circular waste material it is possible to produce climate-friendly concrete grades. With RISE´s test model is it possible to show which cement / binder has the best ability to bind easily soluble chlorides, and thus extend the life of the reinforcing bars and thereby reduce CO2 emissions.
Approach and implementation
Rheological and thermal properties of nanocrystalline cellulose in concrete from RISE Processum and RISE Bioeconomy have been measured to determine their potential to reduce CO2 emissions. A model and method have been developed to test the diffusion of chlorides towards steel reinforcing bars and thereby study the retarding effect of existing products / circular waste material such as nanocrystalline cellulose in concrete. These cement types / binders with a low carbon footprint have a better ability to bind easily soluble chlorides compared to conventional cement types.