Asphalt pavement has been widely used in the construction of highways in China due to its many advantages such as better driving comfort, lower post-maintenance costs, and short construction period. Various diseases will appear on asphalt pavement in the later stages of use. If maintenance and repairs are not carried out in time, it will not only affect the appearance of the road surface, but also affect the driving comfort and safety. If a traffic accident occurs as a result, it will pose a threat to people's lives and property. The following lists some common diseases of asphalt pavement and their treatment methods for everyone to communicate and learn.
Diseases that occur during the use of asphalt pavement include swelling, oil spilling, cracks, looseness, subsidence, potholes, waves, edge gnawing, etc. Without intervention, these diseases will become more severe over time. Moreover, long-term rainwater infiltration and sand erosion may cause damage to the roadbed and even the roadbed, which will increase the cost of later maintenance. Therefore, these diseases should be treated in time in the early stage of occurrence to prevent the disease from expanding.
Oily
Oil bleeding is caused by the excessive oil-to-stone ratio in the asphalt mixture when paving the road, resulting in the gaps between the granules being too small after paving, and the asphalt overflowing onto the road. Ruts are formed after being rolled over by wheels, and rainwater cannot be drained off the road surface in time, causing damage to the road surface. For oil spillage, the original road surface can be removed and replaced with an asphalt mixture with a small oil-stone ratio.
Edge gnawing
The main reason for edge gnawing on asphalt pavement is that the transition between the pavement and the road shoulder is not smooth, the edge is not compacted enough when paving the pavement, or the width of the roadbed is not enough. Coarse aggregates can be used to reinforce the road shoulders for gnawing edges to maintain the proper cross slope of the road shoulders and ensure a smooth connection between the road surface and the road shoulders. The pavement or pavement base can also be appropriately widened and curbs installed. If there is a large area of edge gnawing, it should be repaired in the same way as potholes on the road.
Waves
Waves are slight, continuous, equidistant undulations produced on the asphalt road surface. The main causes are improper treatment of oily pavement, too much asphalt oil, too few fine materials, too little aggregate, and insufficient combination between the base layer and the surface layer. Such a road surface gradually forms a wavy road surface after being pushed and squeezed by driving. If there are waves caused by insufficient bonding between the roadbed and the surface layer, the entire road surface must be removed, an asphalt adhesive layer should be applied to the roadbed, and the asphalt road surface should be paved again as required. If too much fine aggregate in the surface layer causes waves, the surface layer can be removed and paved with a suitable asphalt mixture.