How does Hot Asphalt Concrete Special Fiber improve the durability of pavement?
Publish Time: 2024-07-09
Hot Asphalt Concrete Special Fiber plays an important role in improving the durability of pavement, mainly through the following aspects:1. Improving the cohesiveness of asphalt mixtureHot Asphalt Concrete Special Fiber, such as polyester fiber, has good adsorption properties. When the fiber is dispersed in asphalt, its huge surface area becomes the interface for asphalt infiltration. The fiber can absorb a large amount of asphalt to form an interface layer with a certain thickness. The asphalt in this interface layer is more viscous, less temperature sensitive, and has better heat resistance than free asphalt, thereby improving the cohesiveness of the asphalt mixture. This enhanced cohesiveness helps to reduce the segregation and peeling phenomenon inside the mixture, making the road surface more durable.2. Enhance the overall strength of the asphalt mixtureThe fiber is evenly distributed in the asphalt mixture, forming a three-dimensional random spatial network structure. This structure plays a good pulling and fixing role on the mixture, enhancing the overall strength of the mixture. Specifically, the addition of fiber can improve the tensile, shear, compressive and impact strength of the mixture, making the road surface more stable when subjected to vehicle loads and natural environmental influences.3. Improve the high-temperature stability of asphalt pavementUnder high temperature conditions, asphalt is easy to soften, resulting in rutting, shifting and other defects on the road surface. The addition of Hot Asphalt Concrete Special Fiber can significantly improve the high-temperature stability of asphalt mixtures. On the one hand, the reinforcement effect of the fiber limits the flow of asphalt at high temperatures; on the other hand, the network structure formed by the fiber enhances the skeleton effect of the mixture, allowing the mixture to maintain good integrity and stability at high temperatures.4. Improve the low-temperature crack resistance of asphalt pavementUnder low temperature conditions, asphalt is easy to become brittle, resulting in cracks on the road surface. The addition of Hot Asphalt Concrete Special Fiber can improve the low-temperature crack resistance of the mixture. The addition of fiber thickens the asphalt film in the mixture and reduces the temperature sensitivity of asphalt; at the same time, the fiber mesh structure can also play a certain supporting role at low temperatures, reducing the generation and expansion of cracks.5. Improve the fatigue resistance of asphalt pavementFatigue damage of pavement is one of the main causes of pavement damage. The addition of Hot Asphalt Concrete Special Fiber can improve the fatigue resistance of the mixture. The fiber mesh structure can disperse and absorb the stress concentration caused by vehicle load, reducing the stress concentration and fatigue damage inside the mixture; at the same time, the addition of fiber also improves the toughness and elastic recovery ability of the mixture, so that the pavement can still maintain good performance under repeated loads.6. Improve the water stability of asphalt pavementWater damage is one of the common diseases of asphalt pavement. The addition of Hot Asphalt Concrete Special Fiber can improve the water stability of the mixture. The addition of fiber makes the asphalt film in the mixture thicker and more uniform, reducing the erosion and peeling effect of water on asphalt; at the same time, the fiber mesh structure can also prevent the penetration and diffusion of water in the mixture, thereby improving the water stability of the pavement.In summary, Hot Asphalt Concrete Special Fiber significantly improves the durability of the road surface by improving the cohesiveness, overall strength, high temperature stability, low temperature crack resistance, fatigue resistance and water stability of the asphalt mixture. These excellent properties have made Hot Asphalt Concrete Special Fiber widely used in highway projects and highly recognized.
