paving

Proper Drainage is Vital For an Asphalt Pavement

Flooding on the asphalt surfaces – such as a parking lot – can create huge safety hazards for both drivers and pedestrians.

It’s safe to say that water is not besties with asphalt itself. If you suspect your asphalt pavement is showing signs of water damage, call reliable pavers for paving installation near you right away.

In this short guide, we will explain why proper drainage is crucial for the health of your asphalt pavement.

Damage from Below

If the water gets to the asphalt pavement from below, it can weaken the supporting material and wash away the subsoil, leading the asphalt to develop cracks under pressure. This generally occurs when the drainage system is not adequate, making the ground saturated.

Draining Water Below

How you approach the subsurface drainage will depend on what type of soil you have under the pavement.

While in some cases, a class five aggregate base will work perfectly for the drainage, some cases may require you to install a 12-18’’ layer of drainable sand below that aggregate – especially if the soil is heavy in clay.

You can also choose to install drain tile below your asphalt pavement with a pipe system to get the water away to the storm drain systems.

Damage From Above

If the water gets to the asphalt from above, it destroys the bonds between the sand, rocks, and asphalt binder over time.

Since the asphalt binder is an oil byproduct, it doesn’t mix well with oil (Science 101: oil and water don’t mix). If there’s water sitting on the surface of your asphalt and it doesn’t drain away effectively, it can lead to severe damage to your pavement.

Draining Water Above

The pavement slope should be able to help the water drain before it can pool on the surface. According to most experts, the asphalt pavement should have at least a 1% slope so that the water can drain.

If your pavement is already installed without sufficient slope, you can still patch the potholes and seal the cracks to maintain it.

Water Damage in Winter

Winters can be quite problematic if your asphalt is suffering from water damage. Water can get into preexisting cracks and worsen the situation due to the freeze-thaw cycle (where winters cause the water to freeze, and thus it expands the fissure, then it melts during the summer and slips further down to repeat the process).

In some cases, water can freeze in the layer below the pavement and cause it to pull upwards and crack. Since this is a serious concern, you should call the trained pavers for paving installation near you.

Paving Installation Near Me

If you want to protect your parking lot or driveway and make sure it stays in top shape for years to come, choose Cali Pavers for your asphalt and seal coating needs. Call us at (858) 797-8959 to find out more about how we can
help you.

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