(1) The essence of the synchronous gravel seal is an ultra-thin asphalt gravel surface treatment layer bonded by a certain thickness of asphalt film (1~2mm). Its overall mechanical characteristics are flexible, which can increase the crack resistance of the pavement and heal the pavement. It can reduce cracks in the road surface, reduce reflective cracks on the road surface, improve the anti-seepage performance of the road surface, and maintain waterproof properties for a long time. It can be used for road maintenance to extend the service life of the road surface to more than 10 years. If polymer modified binder is used, the effect will be better.

(2) Synchronize the slip resistance of the gravel seal. The road surface after sealing increases the roughness to a greater extent and greatly improves the friction coefficient of the original road surface, which increases the anti-skid performance of the road surface and restores the smoothness of the road surface to a certain extent, satisfying users (drivers) and transportation industry requirements;
(3) Correction effect on the original road surface. By adopting the construction method of partial multi-layer paving of stones of different particle sizes, the simultaneous gravel sealing layer can effectively cure rutting, subsidence and other diseases with a depth of more than 250px, and treat small cracks, meshes, lean oil, and oil spillage on the original road surface. All have corrective effects. This is unmatched by other maintenance methods;
(4) Synchronized gravel sealing can be used as a transitional pavement for low-grade highways to alleviate the serious shortage of highway construction funds;
(5) The process of synchronous gravel sealing is simple, the construction speed is fast, and traffic can be opened at an instant speed limit;
(6) Whether used for road maintenance or as a transitional pavement, the performance-cost ratio of synchronous gravel seal is significantly better than other surface treatment methods, thus greatly reducing the cost of road repair and maintenance.
Corrective effect on original pavement defects. After pavement sealing, it has a good correction effect on small cracks, meshes, lean oil, and oil spillage on the original pavement. The construction period is short. The road surface after sealing can be opened to traffic with speed limits to alleviate traffic tension and ensure normal use of the road. The construction technology is simple, practical, and has a wide range of applications.
Reduce road maintenance costs. Compared with traditional black pavement maintenance, synchronous gravel sealing has high utilization efficiency and low unit construction cost, which can save 40% to 60% of funds.