Mechanism of Special Reinforcement Fiber for Asphalt Pavement: Polypropylene Fiber

1. Reinforcement. Special reinforced fibers for asphalt pavement exist in three-dimensional dispersed phase in the mixture, which distribute randomly and overlap with each other, forming network winding restraint effect on the mixture, thus overcoming the relative slip between particles and the generation of cracks.

2. Special reinforcement fibers for asphalt pavement have dispersive effect. Without fibers, asphalt mineral powder with large dosage is likely to become micelles and can not be evenly dispersed among aggregates, resulting in oil spots on common pavement. Fibers disperse micelles.

3. Special reinforced fibers for asphalt pavement have the function of adsorbing asphalt. Fiber material is easy to absorb oil in asphalt because of its large specific surface area, which increases the viscosity and adhesion of asphalt, and increases the thickness of structural asphalt film. According to analysis, the thickness of asphalt film is 65%~113% thicker than that of traditional mixture.

4. Special reinforcement fibers for asphalt pavement have stabilizing effect. Fiber addition obviously prevents the flow of asphalt and makes the asphalt in a relatively stable state. Fiber has strong sustainability to asphalt. Usually at high temperature above 130 C, excess asphalt will drop on the surface of fiber. When asphalt expands at high temperature in summer, the voids inside the fibers form a buffer zone, which will not become free asphalt and oil flooding, thus playing a high temperature stabilizing role for the mixture.

Unexpectedly, the small asphalt pavement special reinforced fibers play such a big role in our road construction. Without the use of these materials before, various cracks will appear in the road construction when it is used, and the passing ability of vehicles is not good. Now with the use of these materials, the overall performance of roads has been greatly improved, so we are building roads. When it comes to road construction, we must use advanced road polyester fibers to ensure the quality of road construction.