Nothing lasts forever, but you should still try to keep your asphalt in impeccable condition. Maintaining infrastructure with asphalt pavement provides durability, but it comes with challenges due to its tendency to crack. Small cracks can grow, leading to significant damage, costly repairs, and compromised safety.
To understand the causes and implement effective maintenance, get familiar with these things that can cause asphalt alligator cracking.
What Is Alligator Cracking?
Alligator cracking, also known as fatigue cracking, resembles the scales of an alligator. This pattern of linked cracks indicates deterioration within the asphalt and underlying weaknesses that should be addressed promptly to prevent further damage.
Unlike surface-level damage, such as potholes or linear cracks from temperature changes or minor impacts, alligator cracking usually results from repeated stress and foundational issues. Differentiating alligator cracking from other pavement damage helps you apply the proper remedies and preventive measures.
Causes of Alligator Cracking
Several factors contribute to the development of alligator cracking. Understanding these causes can help you implement the right maintenance strategies to prolong the lifespan of your asphalt.
1. Heavy Traffic Loads
Heavy traffic is one of the primary causes of alligator cracking. When asphalt constantly bears heavy loads, especially from large trucks or frequent vehicle movement, it weakens over time. The repeated pressure causes cracks to form, eventually merging into the distinctive alligator pattern. Regular monitoring and timely repairs are crucial for areas with high traffic, such as commercial parking lots or roads with heavy vehicle use.
2. Improper Installation Techniques
The longevity of asphalt surfaces heavily depends on correct installation practices. Inadequate compaction, improper layering, or using substandard materials during installation can cause alligator cracking. Properly installed asphalt surfaces are less likely to experience premature wear, while incorrect installation can compromise the pavement structure from the start.
Experienced professionals should install your asphalt pavement, as they adhere to industry standards and ensure a strong, durable foundation. Correct installation helps reduce the risk of alligator cracking and other premature damage.
3. Subgrade Failure
The subgrade, or the layer beneath the asphalt, plays a critical role in supporting the entire pavement structure. When the subgrade fails due to poor soil conditions, inadequate compaction, or moisture issues, the asphalt surface can crack. Subgrade failure weakens the pavement’s foundation, resulting in alligator cracking on the surface.
Addressing subgrade issues requires a solid understanding of soil mechanics and sound construction techniques. If subgrade problems are not addressed during the installation process, the cracks are likely to worsen over time.
4. Aging and Oxidation
Over time, asphalt naturally ages and oxidizes. This process makes the binder in the asphalt brittle, reducing its flexibility and resilience. When asphalt becomes brittle, it’s more likely to crack under stress, forming alligator patterns. While aging is inevitable, regular maintenance can slow this process and extend the lifespan of your pavement.
Using high-quality sealers can help protect asphalt surfaces from the damaging effects of oxidation and UV exposure, keeping your pavement more flexible and resistant to cracking.
5. Inadequate Drainage Systems
Water is one of asphalt’s greatest enemies. Poor drainage allows water to accumulate or infiltrate the subgrade, accelerating asphalt deterioration. When water seeps into the pavement structure, it weakens the material, causing cracks that eventually form alligator patterns.
Proper drainage is essential to maintaining the integrity of your asphalt. Installing and maintaining effective drainage systems helps prevent water from pooling on the surface or penetrating the subgrade, thus preserving your pavement’s structural integrity.
Preventive Measures for Property Managers
For property managers, preventing alligator cracking involves proactive maintenance. Regular inspections help you detect early signs of stress or damage, allowing for timely intervention before small cracks turn into large problems.
Here are a few preventive measures:
- Implement load restrictions: Limiting heavy vehicle traffic, particularly from large trucks, reduces the amount of pressure on your pavement.
- Repair cracks early: Addressing minor cracks before they expand can prevent further damage. Use quality materials for crack filling to ensure durable repairs.
- Ensure proper drainage: Make sure your drainage systems are working correctly to prevent water from infiltrating the asphalt structure. Clean and maintain drains regularly to ensure they function optimally.
Conclusion
Grasping the factors leading to alligator cracking in asphalt is crucial for property managers and homeowners. Regular inspections and maintenance, along with timely repairs, can help prevent this kind of damage. Investing in high-quality crack repair products and using professional-grade equipment are essential for keeping your asphalt surfaces in top condition.
For expert guidance and quality materials, Asphalt Sealcoating Supply Inc. offers a wide range of asphalt maintenance products to help property owners extend the life of their asphalt. With the right tools and techniques, you can ensure your pavement stays durable, safe, and aesthetically pleasing for years to come.