Cracks in asphalt pavement may seem like a minor inconvenience, but they can quickly develop into significant problems. Left unrepaired, these cracks allow water to penetrate the pavement, weakening its structure and leading to expensive repairs down the road. Fortunately, crack sealing is a simple and effective way to prevent further damage. However, the timing of crack sealing is crucial for its effectiveness. Here’s everything you need to know about crack sealing and the best timing for it.
How Cracks Compromise Pavement
Cracks act as entry points for water, the primary enemy of asphalt pavement. Water infiltration weakens the pavement in two main ways:
A. Water Infiltration
Water weakens the bond between the aggregate (the stones within the asphalt) and the asphalt binder (the substance that holds everything together). This reduces the overall strength of the pavement, making it more susceptible to cracking and pothole formation under traffic pressure. In addition, water can freeze within the cracks, expanding and exerting immense pressure that widens the cracks and worsens the situation.
B. Subgrade Destabilization
Water doesn’t just target the asphalt itself; it also undermines the subgrade, the layer of soil beneath the pavement that provides support. When water saturates the subgrade, it can cause the soil to lose its stability, leading to the pavement settling and becoming uneven. This unevenness can create further cracks and significantly shorten the pavement’s lifespan.
Choosing the Right Time for Crack Repair
There are two main approaches to consider when deciding when to seal cracks.
The reactive approach involves waiting until cracks become wider and more numerous before taking action. While this approach may seem appealing initially, it can be risky. By the time cracks become readily apparent, significant damage might already be present, requiring more extensive (and expensive) repairs.
The proactive approach emphasizes early intervention. Sealing cracks while they are still narrow (ideally less than ¼ inch wide) prevents water infiltration and subsequent subgrade destabilization. This not only preserves the structural integrity of the pavement but also extends its lifespan, saving money on future repairs.
Temperature, Precipitation, and the Sealing Window
While timing your crack sealing intervention is crucial, external factors like temperature and precipitation also play a significant role. There is a specific “window of opportunity” for optimal sealing.
Asphalt itself is sensitive to temperature. For proper adhesion of the sealant, the pavement surface needs to be within a specific temperature range, ideally between 50°F and 90°F. Temperatures outside this range can make the asphalt too stiff or too soft, compromising the bond between the sealant and the pavement.
Precipitation can hinder the sealing process. Rain or excessive moisture on the pavement surface prevents the sealant from adhering properly. Therefore, scheduling crack sealing during dry weather with consistent temperatures within the optimal range is essential for successful results.
Final Thoughts
By understanding the threats posed by cracks and the importance of timing your response, you can transform crack sealing into a strategic investment. By proactively sealing cracks during the opportune window and with proper consideration for environmental factors, you’ll safeguard your pavement’s health, extend its lifespan, and ultimately save yourself from costly repairs in the future.
A well-maintained pavement translates to smoother rides, fewer safety hazards, and a significant boost to your property value.
Georgia’s Wildcat Paving – A Leader in Quality Asphalt and Concrete Services
If your pavement has cracks that need to be filled, don’t wait – contact Georgia’s Wildcat Paving today. Our team of experts knows how to maintain high quality, durable asphalt and concrete pavement surfaces. Whether you need a road or a parking lot repaved, we can help. Contact us today or give us a call at (676) 377-3113 to speak with one of our experts and schedule a consultation.
