Asphalt pavement maintenance technical work is mainly to repair the local minor initial damage in time to maintain the quality of the pavement and prolong the service life. Specifically, it can be divided into initial maintenance, daily maintenance and preventive seasonal maintenance.
In this article, we mainly talk about initial maintenance.
The main requirements for initial maintenance of hot-mix asphalt pavement are as follows:
The surface layer of the hot-mix asphalt mixture must be fully compacted, and the traffic can be opened only when the paving layer is completely cooled down and the surface temperature of the mixture is lower than 50°C;
The vertical and horizontal construction joints are the weak points of the road surface. In particular, the initial maintenance should be strengthened, shoveling height to compensate for low, flattening and compacting, eliminating gaps, and maintaining smoothness and compactness.
The main requirements for initial maintenance of asphalt penetration pavement are as follows:
At the initial stage of opening traffic, the speed should be controlled not to exceed 20km/h until the road surface is fully formed.
Technician should be assigned to direct traffic or set cone-shaped traffic signs to control the driving of vehicles till full compaction.
The caulking material dissipated by driving should be swept back, evenly distributed, and compacted at any time to form a flat and compact upper sealing layer. If there is oil flooding, you should add the same caulking material with the same specifications as the last layer of stone in the oil flooded area, and carefully sweep it; excessive floating stone should be swept out of the road or recycled to avoid rubbing the already stuck in place Aggregate; if there is other damage, it should be repaired in time.
The main requirements for the initial maintenance of the asphalt surface treatment pavement are as follows:
The initial maintenance of the asphalt surface treatment pavement constructed by the layer paving method is basically the same as that of the penetration pavement. Because the surface treatment pavement is thin, the initial maintenance should be strengthened.
The initial maintenance of the asphalt surface treatment pavement constructed by the mixing method is basically the same as that of the hot-mix asphalt pavement, and more attention should be paid to the timely repair of the early disease.
For emulsified asphalt penetration pavement and emulsified asphalt gravel mixture pavement, due to its poor initial stability, the compacted pavement should be managed by a special person, and closed to traffic for 2-6 hours; on the road section where the emulsion has not been broken It is strictly prohibited for all vehicles, people, and animals to pass through; at the initial stage of opening traffic, the speed should be controlled not to exceed 20km/h, and it is not allowed to brake or turn around. When there is damage, it should be repaired in time.
