Asphalt is a durable and long-lasting paving material that is commonly used for roads, driveways, and parking lots. Properly made and installed asphalt pavements rarely weaken and deteriorate from traffic wear. However, like any other material, it is vulnerable to various threats that can damage its surface and shorten its lifespan.
Asphalt deterioration is caused by oxidation, petroleum spills and water intrusion. The sun will oxidize the pavement and begin evaporating oils that bind aggregates. The pavement becomes brittle, cracks, and exposes the subsurface. Eventually, erosion can reduce the thickness of the pavement. Petroleum product spills may dissolve asphalt, reducing the binding power of the aggregates and causing the pavement to fail. Water enters the cracks and exposed areas, it works its way into the subgrade and softens the base. During freeze cycles, the strength of asphalt is weakened as the expansion and contraction of ice loosen the aggregate. Ultimately the base begins to buckle under normal traffic load.
To avoid those kinds of damages, you can do sealcoating which is a protective layer applied to the surface of asphalt pavement. It provides several benefits that can extend the life of the pavement and improve its appearance. Here are four benefits of sealcoating: