How to Increase Subgrade Support for a Stronger Asphalt Paving

How to Increase Subgrade Support for a Stronger Asphalt Paving

How to Increase Subgrade Support for a Stronger Asphalt Paving

Asphalt pavements can last for many years if built correctly with sturdy materials and laid down with expertise. However, the foundation upon which the asphalt is installed plays a major role in its longevity. A solid, strong subgrade support is essential for holding the weight of vehicles, preventing potholes and cracks, and ensuring a smooth ride. In this blog post, we'll share some tips and tricks for increasing subgrade support to create a stronger and more durable asphalt paving.

Test the Soil

Before beginning any construction work, soil testing is necessary to determine the type, stability, and load-bearing capacity of the soil. Depending on the results, you may need to modify the site with soil stabilization techniques, such as adding aggregates, lime, or cement. This will improve the soil's ability to support the weight of asphalt and prevent sinking or shifting.

Use Geotextiles

Geotextiles refer to strong synthetic fabrics that are placed between the soil and asphalt layers. These fabrics improve soil stability, reduce soil erosion and drainage problems, and distribute traffic loads more efficiently. Geotextiles are especially useful in areas with weak or loose soils that may not provide adequate subgrade support.

Compact the Soil

Soil compaction is a crucial step in building a sturdy subgrade. A vibrating compactor or a roller machine is used to compress the soil layers, removing air pockets and increasing soil density. Proper compaction ensures that the soil can withstand the weight of the asphalt and prevent deformation and cracking.

Install Drainage systems

Poor drainage can cause water to accumulate in the subgrade, weakening the soil and causing premature damage to the asphalt surface. Installing drainage systems, such as French drains or sub-surface drainage outlets, will improve water flow and prevent damage to the subgrade.

Choose the Right Materials

Lastly, selecting high-quality materials for the asphalt paving is essential for a strong and durable surface. High-grade asphalt, aggregates, and binder materials contribute to the overall strength of the pavement. Choosing the right mix design is essential to ensuring that the asphalt paving will last for many years.



Building a strong and durable asphalt paving requires a solid subgrade support that can withstand the pressure of vehicles and environmental factors. By implementing the above tips, you can increase subgrade support to create a long-lasting, smooth, and safe surface for your property. If you're looking for asphalt paving services in Sacramento CA, our team at M. Carroll Blacktop Service is here to help. Get in touch with us today to request a free quote and learn more about how we can assist you with your paving needs.

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