Asphalt Pavement Defects To Know Part 1

With the changing weather comes the inevitable–the possibility of asphalt pavement getting cracks, potholes, depressions and rutting. It may sound simple when heard, but Lakeland parking lot paving problems aren’t exactly a walk in the park. It can cause financial damage to one’s business and it can cheapen the look of your home’s driveway.

Asphalt pavement problems are mostly associated with cracks and potholes, but they’re not limited to that. There are several more defects we usually see but don’t notice on asphalt pavement. Here are some of the asphalt pavement issues we should look into:

Alligator cracking

This is often associated with structural failure. The presence of alligator cracking means weakness in the surface, the base, or the subgrade. It may also mean that the base is too thin or that the pavement has a poor drainage system. Of course, a combination of the three is much worse. You will notice the start of alligator cracking when longitudinal cracking appears on the road.

Block cracking

Block cracks look like rough interconnected rectangles. This is not usually caused by the load of traffic, but is actually a result of the shrinkage of the asphalt pavement because of the inability of the asphalt binder to expand and contract with the change in temperature. The reasons for this are: the mix was mixed and placed too dry, poor choice of asphalt binder, aging or dried out asphalt, and aggregate mix has low penetration.

Linear Cracking

Linear cracking are the kind of cracks we usually see on asphalt pavements. They are parallel to the pavement’s centerline or laydown direction. This can be caused by pavement fatigue, poor joint construction, or reflective cracking. Minor linear cracks can be repaired with a sealant to prevent moisture from coming into the cracks and affecting the asphalt layers beneath. Severe cracks must be repaired by replacing the cracked pavement layer with an overlay.

Transverse Cracking

Unlike the linear cracks, transverse cracking appears perpendicular to the pavement’s centerline or laydown direction. It can be caused by reflective cracks from an underlying layer, poor construction, or changing weather cycles.

Edge Cracks

Edge cracks can be found within one or two feet from the end of the asphalt pavement. The most common reasons why such cracks appear are poor drainage conditions and lack of support for the pavement edge. When such was done, the underlying base materials are not settled well and become weakened as time passes. Other causes for these cracks are heavy vegetation and traffic.

No comments yet.

Leave a Reply