Analysis of the mechanism of action of basalt fibers

1 Adsorption and viscosity enhancement of fibers

Basalt fibershave a large specific surface area, which enables them to form an interface of infiltration and adsorption in the asphalt mixture to enhance viscosity. At the interface between the fiber and asphalt, asphalt monomolecules are arranged into a structural layer, assuming the role of transferring and buffering stress. Related studies have shown that Basalt Fibers have a strong adsorption capacity, which significantly enhances the viscosity of asphalt mixtures. This viscosity enhancement makes the interface between asphalt and fibers more stable, thus effectively improving the overall performance of asphalt mixtures.

2 Stabilizing effect of fibers

In asphalt mixtures, basalt fibers exist in a three-dimensional dispersed state, reducing the proportion of free asphalt and increasing the proportion of structural asphalt. Such a change results in increased viscosity of the asphalt mastic and improved temperature stability. The study shows that the addition of basalt fibers significantly improves the low-temperature cracking resistance of asphalt mixtures, and its three-dimensional network structure effectively delays the development of cracks and enhances the integrity and cracking resistance of the mixtures.

3 Reinforcement and Crack Resistance of Fibers

The three-dimensional spatial grid structure formed by basalt fibers in the mix plays a crucial role in the crack-resistant properties. The structure not only prevents the further expansion of cracks but also delays the development time of cracks. The results of the study show that the incorporation of fibers significantly improves the crack resistance of asphalt mixtures and enhances their self-healing ability.

Conclusion

Comprehensive research results at home and abroad, the role of basalt fibers in asphalt mixtures can be summarized as follows: they are distributed in the mixture in an irregular three-dimensional mesh structure, with the function of a tandem skeleton. When the initial cracking of the asphalt mixture, basalt fibers effectively prevent the further expansion of cracks through the tensile effect, thus enhancing the overall performance of the asphalt mixture. These advantages make basalt fibers an important part of modified asphalt materials and have a positive impact on improving the durability and safety of roads.