China's highway especially highway use of semi-rigid road base, pavement cracks of structural cracks, the bottom-up development. Once the pavement cracks, as the vehicle load run, rain and snow water intrusion will be early damage phenomenon. Preventive maintenance is the key to the road at the right time, on a suitable surface, the application of appropriate technology. According to the actual road conditions, select the appropriate pavement preventive maintenance techniques for guiding highway maintenance work of great significance. Currently, the main technology used in asphalt pavement preventive maintenance are: surface treatment, cracks Treatment, Surface Treatment, thin overlay, in situ regeneration.
1.Surface treatment
Surface treatments include fog seal, regenerated catalyst aging treatment methods. Seal coat material is a layer of asphalt or other sealing agent, also used smaller asphalt. When the asphalt is still in the basic good condition, minor cracks have begun to appear, when the phenomenon of lean, asphalt pavement surface treatment is the most effective means of preventive maintenance.
2.Crack treatment
Crack Treatment routine preventive conservation measures, the economy. Can effectively fill asphalt pavement crack sealing, greatly reduce the formation of cracks and potholes in the further development induced by other diseases. Treatment methods are impermeable membrane affixed tape, pouring, caulking, T slot heat up, hot Wabu. Crack Treatment Technology at the right time, with the appropriate road is very effective, it can be extended for two years or even longer pavement life.
3.Surface treatment
Our asphalt pavement preventive maintenance measures to the most widely used, the best performance of the surface Treatment. Treatment includes road surface gravel seal coat, slurry seal and micro surfacing technology.
