THE LIFECYCLE OF ASPHALT

As with everything, asphalt has a beginning and an end. Understanding asphalt’s lifecycle comes down to understanding how and why asphalt eventually needs to be replaced. That replacement date ultimately comes down to several factors. So, what is asphalt’s lifecycle and what are some of the reasons it needs replacement?

Long before the asphalt is laid down, it gets blended. There are several different formulations and varying price ranges for each. Those formulations are made up of gravel, aggregates, sand, stones, and asphalt, which is itself a combination of oxygen, nitrogen, and sulfur. Lower priced asphalt will typically last from 5 to 15 or more years. More expensive asphalt can last up to 25 years or more. However, how the asphalt is laid plays a big role in how long it lasts.

The asphalt mixture is hot mixed and the site is prepared through a series of predetermined steps. First, the area is demolished and the debris is removed with heavy-duty equipment. Next, the area is prepared so that it can accommodate water drainage. The third step involves preparing the sub-base which is then compacted by equipment. The binder is then laid down which is large aggregate mixed with oil. Finally, the top layer of asphalt is added which provides a smooth surface finish.

Asphalt Maintenance

Properly maintained asphalt can last much longer than asphalt that’s left on its own. Proper asphalt repair includes cleaning oil stands, removing rocks and debris, fixing cracks with crack sealing, patching holes, and regularly applying seal-coating. Regular asphalt maintenance goes a long way to extending the asphalt’s life.

However, there are other factors that determine how long the asphalt lasts. One factor includes the amount of traffic the asphalt handles. The weight of that traffic is another factor. Therefore, a high-traffic industrial area where trucks and equipment are present will have a more compound effect on the asphalt than vehicles that weigh less.

The weather and environment are other factors. Extremely cold temperatures can crack the asphalt and the process of freezing and thawing can cause the asphalt to rise and buckle. High heat is also a problem. It can cause the asphalt to expand, thereby exposing soft spots that can easily become large holes. Here is a general breakdown of the lifecycle for asphalt in five separate stages.

Stage 1: 0-5 years

Freshly installed asphalt shouldn’t need any maintenance or upkeep during this initial stage aside from routine seasonal care and general tidying up.

Stage 2: 5-7 years

After the first five years, cracks begin to form in the asphalt and the freshly-paved luster starts to fade. It’s time for some initial maintenance!

Stage 3: 7-15 years

Once your asphalt starts reaching double digits in age, you’ll need to start paying closer attention to regular maintenance.

Stage 4: 15-25 years

This is typically the time in your asphalt’s life when major repairs start becoming more common.

Stage 5: 25 or more years

If your asphalt has made it this far, then congratulations! However, it’s more than likely that now is the time the asphalt has to be replaced.

It’s good practice to continually remove debris and oil stains regardless of which stage the asphalt is in. Doing this will protect your investment and ensure that you’re not forced to cover the costs of replacing the asphalt too early.