Fatigue cracking in asphalt is a common issue characterized by a series of interconnected cracks that resemble a spider web. This type of damage can be seen on driveways, roads, and parking lots. While it may seem like a minor issue at first, fatigue cracking can lead to larger cracks, potholes, and further deterioration of the pavement. Fortunately, this damage can be prevented and repaired with crack filler and other treatments if addressed early. So, what causes fatigue cracking in asphalt? Let’s explore some of the main culprits.
Poor Construction
One of the primary causes of fatigue cracking is poor construction. If the paving crew doesn't follow the proper procedures, or if they use subpar materials, the asphalt won't be durable enough to withstand the elements. Proper leveling of the subgrade, the right type of aggregate, and using high-quality asphalt are all essential steps in ensuring a long-lasting pavement. Skipping these steps can lead to cracks forming prematurely.
Inadequate Structural Design
This issue often goes hand-in-hand with poor construction. Ensuring that the pavement is properly designed for the expected traffic load is critical. The right grade of stone and asphalt mix for the conditions will provide the necessary support and durability. If these factors are overlooked during the planning stages, the pavement will fail sooner than expected.
Excessive Load on the Asphalt
Asphalt can only support a certain weight before it starts to break down. When vehicles consistently exceed the weight limit, the asphalt will deteriorate much more quickly. Unlike concrete, asphalt isn't as capable of handling heavy loads, making it more susceptible to damage from overloaded vehicles. Implementing weight limits can help extend the life of asphalt surfaces.
Erosion of Support Beneath the Asphalt
The subgrade, or the layer beneath the asphalt, plays a crucial role in the overall durability of the pavement. If the subgrade erodes due to poor drainage, the entire surface can weaken. Just like a sinkhole, the asphalt may appear stable on top, but without adequate support below, it’s only a matter of time before the surface cracks or collapses.
Thin Asphalt Layer
A thin layer of asphalt will not have the strength needed to withstand the weight and stress it’s subjected to. This often happens due to poor construction or design. In these cases, cracks start at the bottom of the asphalt layer where the tensile stress is highest, eventually making their way to the surface. This is known as “bottom-up” or “classical” fatigue cracking.
Prevent and Repair Fatigue Cracking with Asphalt Sealcoating Supply Inc.
Understanding the causes of fatigue cracking is the first step in preventing and repairing it. If you’re dealing with cracks in your asphalt, contact Asphalt Sealcoating Supply Inc. at 304-916-6117 for high-quality materials and expert advice on repairing and maintaining your asphalt surfaces.