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Yes, lampposts need a concrete base. The concrete base provides a stable foundation for the lamppost, which can be heavy from the weight of the light fixture and other accessories. A concrete base also provides structural support for the lamppost, keeping it from sinking into the ground or tipping over in the wind. 

Concrete can cure in 24 hours if the temperature remains above 40 degrees, but it might take up to 48 hours for the initial curing if the temperature drops close to freezing. You can speed up the curing process in cold weather by using accelerants, or you can insulate the slab or enclose and warm the area with heaters.

If the moisture level in your concrete flooring is higher than what is acceptable for your primer or flooring materials, then you are looking at dealing with major flooring issues down the road. From mold and mildew, to warping, buckling, bubbling, and soft spots, you could see a wide range of moisture-induced problems.

These issues can affect not just your flooring but your foundation too. That is why measuring moisture in concrete is so important before starting a project.

A layer of exposed aggregate concrete should be 1 to 2 inches thick if you’re installing it on top of existing concrete. If you’re pouring a new slab with the finish, slab thickness will depend on the application. Exposed aggregate concrete driveways should be 4 to 6 inches thick in most cases or 8 to 12 inches for commercial vehicles. Sidewalks, patios, and walkways should be 4 inches thick.