Quick Answer
Using road base can improve the stability of a driveway, but it's essential to compact it properly and add a layer of aggregate or gravel on top for drainage and traction.
Choosing the Right Road Base Material
When selecting a road base material for your driveway, consider the weight and traffic it will need to withstand. A mix of crushed stone, gravel, and sand is ideal for most rural driveways. A 6-inch (15 cm) thick layer of compacted road base, with a mix of 50% crushed stone, 30% gravel, and 20% sand, will provide a stable foundation.
Compaction Techniques for Road Base
To ensure a stable driveway, it’s crucial to compact the road base material properly. Use a plate compactor or a hand tamper to compact the material in 2-inch (5 cm) thick layers, starting from the bottom and working your way up. Compact each layer to a density of at least 95% of its maximum density. This will prevent settling and shifting of the road base over time.
Adding a Layer of Aggregate or Gravel
Once the road base is compacted, add a 2-inch (5 cm) thick layer of aggregate or gravel on top. This will provide drainage and traction, preventing mud and dust from accumulating on the driveway. Use a 2B or 4B gravel size, which is large enough to allow for good drainage but small enough to provide traction.
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