MARTINEZ — When installing a concrete feature such as a driveway or patio, it’s crucial to follow proper procedure—otherwise, the installation will be susceptible to settling over time. Here are a few important aspects to consider:
• Whether it’s plain soil or base rock, the subgrade (the native soil) needs to be properly compacted. Ideally, base rock should be compacted to a 98 percent proctor density, which will provide a solid surface for the concrete to lie upon.
• If the native soil doesn’t provide an adequate subgrade material, a fill alternative like sand, gravel or crushed stone may be necessary to achieve the low compressibility needed to support the concrete installation. Read more