A typical asphalt pavement might last 12-15 years without maintenance. As soon as asphalt is laid down, it’s exposed to conditions that immediately begin to degrade the pavement. Understanding the causes of asphalt damage and identifying when it’s taking place will help you prioritize what asphalt repair and maintenance tasks need to be done immediately to help prevent further damage.
1. UV Rays
Asphalt is made up of rock, sand, and aggregates. They’re held together by a binder (asphalt cement) that acts as a glue. When UV rays break down the binder, there’s nothing holding the rock, sand, and aggregates together, and raveling occurs on your pavement’s surface. When you start to see a lot of loose gravel, you know that the asphalt cement is breaking down.
Fresh asphalt has a black charcoal color and flexes under varying traffic loads. Exposure to oxygen fades the color of your asphalt from black charcoal to gray. Additionally, as the asphalt cement is broken down, your asphalt loses its flexibility and will begin to crack under vehicle loads.
3. Heavy Vehicles
Garbage and delivery trucks put a lot of weight on your asphalt. Once your asphalt has started to oxidize, it will begin to crack under these heavy traffic loads.
Whether it be from rain or from tenants washing their cars, if you have cracks in your pavement and allow water to get in those cracks, the base course of your pavement will be damaged. Underground water drainage can also be a cause for asphalt damage. Once the base course has become damaged, your pavement’s ability to carry traffic load decreases and your pavement becomes more prone to cracks and potholes in the future. Once you have structural damage, repaving becomes the only way to permanently fix the issue.
5. Oil Stains
Oil stains from parked cars will eat through and degrade your asphalt. Address oil stains quickly or it’ll become saturated into the asphalt and will become very hard (and costly) to repair the damage.
The earlier you can identify pavement damage, the earlier you can treat it and prevent further damage to your asphalt. Next week in our second seminar preview, we’ll talk about what asphalt repair and maintenance tasks are essential for remedying the damage caused by UV rays, oxidation, heavy vehicles, water, and oil stains. Contact Blakroc Corp for asphalt repair, rejuvenation, maintenance, and parking lot striping in Boise, Idaho and surrounding areas.