What are the main functions of adding flocculent lignin

The main function of adding wood fibers is:

1. Reinforcement effect: Adding fibers to SMA mixture, they are uniformly dispersed in a three-dimensional state in the mixture, like various steel fibers, geogrids, geotextiles and other reinforcement materials, which can play a reinforcing role.

2. Dispersion effect: Without fibers, a large amount of asphalt mineral powder is likely to become clumps and cannot be evenly dispersed between aggregates. After being laid on the road surface, "oil spots" will be clearly visible. Fibers can evenly disperse micelles.

3. The function of adsorbing and absorbing asphalt: The addition of fiber stabilizers in SMA mixing hoppers is to fully adsorb (surface) and absorb (internal) asphalt, thereby increasing the amount of asphalt used, thickening the asphalt oil film, and improving the durability of the mixture.

4. Stabilizing effect: Fibers keep the asphalt film in a relatively stable state, especially during the high temperature season in summer. When the asphalt expands due to heat, the internal voids of the fibers will also serve as a buffer space, preventing it from becoming free asphalt and spilling oil, which is also beneficial for high-temperature stability.

5. Adhesive effect: Improve bonding strength. Fibers will increase the adhesion between asphalt and mineral aggregates, and improve the bonding strength between aggregates through the adhesion of oil film.