Erosion
The forces of water and wind can cause soil to wear away. This process is called erosion.
Soil Erosion Under Concrete
One of the biggest threats to your concrete slabs is soil erosion. When the elements erode the soil under your driveway, sidewalk, patio, or other concrete slabs, it can leave a void under the slab. You can end up with cracked, sunken concrete due to the lack of support under your concrete and weight compaction from anything on top of that concrete (e.g., cars, hot tubs, etc.)
What Soil Is Affected the Most?
There are a few factors to consider when we discuss the most commonly affected soil:
Poorly compacted soil - when a driveway or sidewalk is poured over poorly compacted soil, the chances are the soil will settle and erode, and cracks will form in the concrete and sink.
Certain soil types are more prone to erosion—soil with a high sand content is more likely to erode than clay. Clay has its problems, as it expands with water and can cause heaving. However, erosion is the problem that causes the settlement of soils and open voids beneath the concrete.
Plumbing leaks can cause washout - underground water leaks can lead to sinkholes and voids beneath concrete, leading to sinking concrete.
What are the causes of erosion?
Rainwater Runoff: When soil erosion occurs due to heavy rainfall, it can wash away the protective topsoil that acts as a buffer between concrete surfaces and the elements. This exposes the concrete to more direct contact with water, leading to accelerated deterioration.
Wind Erosion: Wind erosion can carry away fine soil particles, creating the "sandblasting effect." These particles can hit concrete surfaces at high speeds, causing small cracks and weakening the structure over time.
Vegetation Loss: Plants and grasses are crucial in stabilizing soil with their roots. As erosion removes vegetation, the soil's ability to hold moisture and provide a protective layer diminishes, leaving concrete susceptible to cracking and structural issues.
Water Channeling: Erosion can create pathways for water to flow along concrete surfaces, leading to increased wear and tear. Over time, this can result in the formation of grooves and even potholes, making maintenance a costly affair.
If you notice hairline cracks or uneven concrete in your concrete slab, you should move quickly to have it looked at. Our team offers free estimates for concrete sinking and settling due to erosion. Repairing concrete vs. replacing concrete can be much less disruptive and save you much money. The polyurethane concrete repair process is simple, and we are typically in and out within about four hours. To learn more, reach out to our team. We’re here to answer your questions!