The application of basalt fiber in highway maintenance engineering such as slurry seal, micro-surfacing, thin-layer overlay, pavement regeneration, reconstruction and extension is mainly introduced.
Basalt fiber can greatly improve the high- temperature anti-rut and anti-deformation ability, low-temperature cracking resistance, water damage resistance and fatigue durability of asphalt mixture, therefore it can greatly improve the performance and service life of Micro-surfacing and slurry seal, and reduce the maintenance cost of asphalt pavement.
As a maintenance technology with a thickness of only about 1 cm, fatigue cracking is the biggest problem of the pavement of the micro surfacing. The basalt fiber micro surface can significantly improve the crack resistance and other related properties of the pavement of the micro-surfacing . Good application results have been achieved in physical engineering.
It has been proved in practice that adding fiber into asphalt mixture can obviously improve the comprehensive pavement performance of asphalt pavement, especially in preventing reflective cracking and enhancing anti-rutting ability. Therefore, it is a good attempt to apply it on the overlay of the old highway surface.
As a result of aging of the material, the modulus of the recycled asphalt mixture is larger, the cracking resistance is reduced. The excellent tensile properties of the basalt fiber can significantly improve the crack resistance of the recycled asphalt mixture. It is also beneficial to improve the high temperature stability and water stability of the recycled concrete.
Reconstruction and extension
Basalt fiber can greatly improve the high temperature resistance to rutting deformation, low temperature crack resistance, water damage resistance and fatigue durability of asphalt mixture. Therefore, it can be used in road reconstruction and expansion, which can well improve the performance of the mixture. It is very good to improve the construction joints formed by the overlapping of old and new roads.