1. Introduction to Fiber Crushed Stone Seal Coating Construction Technology
Fiber crushed stone sealing layer is a new type of road construction and maintenance technology, mainly used for the wear layer of asphalt pavement, stress absorption layer of semi-rigid asphalt pavement, and stress absorption layer of old cement concrete pavement overlay. This technology uses fiber sealing equipment to simultaneously spray asphalt binder, fibers, and crushed stone, and after rolling, forms a wear layer or stress absorbing intermediate layer with high tensile, shear, compressive, and impact strength.
2. Principles of Fiber Crushed Stone Seal Coating Construction Technology
The fiber crushed stone sealing technology forms a dense network winding structure through the high tensile strength and elastic modulus of fibers, which can effectively absorb and disperse stress, suppress the generation of reflective cracks, and improve the service life of roads. This structure can also improve the wear resistance, waterproofing, and stability of the sealing layer, reduce the slip and detachment of aggregates, and prevent the occurrence of low-temperature shrinkage cracks.
3. Advantages of Fiber Crushed Stone Seal Coating Construction Technology
(1) Stress absorption and diffusion ability: Fiber reinforced crushed stone sealing layer has a unique network winding structure, which can effectively absorb and disperse stress, suppress the occurrence of reflective cracks, and extend the service life of the road.
(2) High wear resistance and waterproofing: Due to the mesh structure formed by the fiber and asphalt binder, it can effectively suppress the slip and detachment of aggregates, prevent the occurrence of low-temperature shrinkage cracks, and improve waterproofing performance.
(3) Construction speed: A complete set of synchronous construction equipment can quickly complete the spreading of asphalt, fibers, and gravel, shorten construction time, and reduce the impact on traffic.
4. Application scenarios of fiber crushed stone sealing layer construction
(1) Laying and repaving of road surface: serving as a stress absorbing layer between the subgrade and surface layers to prevent reflection cracks.
(2) New/old asphalt pavement: laying ultra-thin wear layer and conducting preventive maintenance.
(3) Highway construction: Replace slurry seal and ordinary gravel seal, and enhance the lower seal layer.
(4) Old cement pavement renovation: as a bonding waterproof and stress absorbing layer.
5. Fiber gravel sealing construction machinery
Specialized synchronous construction equipment can complete synchronous spraying of hot-melt composite modified asphalt, synchronous cutting and spraying of glass fibers, and synchronous covering of crushed stones, ensuring construction quality and efficiency.
