The project ran between May and November 2022.
The project has prepared different types of chemically modified kraft lignin and blended them with unmodified lignin to simulate the bitumen chemical structures and physical properties. After screening different blending formulations for cement-modified cold-applied asphalt preparation and characterization, an optimal formulation has been found with satisfactory binder workability and performance, compared to the control bitumen binder.
Demonstrated by this optimal formulation, this all-lignin-based binder has thus been considered technically feasible as a bitumen alternative. Market analysis reveals the unique and exclusive position of this completely bitumen-free binder. There are big market potentials, as predicted from the market sizes of bitumen-based asphalt and the production capacity of kraft lignin.
Participants
Lignin Unit at RISE/Bioeconomy and Health and Potmix Products AB.
Budget
The project’s budget was 880 KSEK.