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Sidewalks are concrete, not cement. Cement is merely an ingredient of concrete. To pour a sidewalk, driveway, or patio, you need to form the right mixture of concrete using cement, aggregates, and water. Pouring concrete requires special tools such as a concrete mixer, compactor, screeds, and floats. Unless you're pouring a small area, it's best to hire a concrete pro for a sidewalk or driveway project.

Cobblestone is just one of many driveway materials. Other, more economical, albeit less elaborate options include concrete, asphalt, and gravel. 

If you want a material that most closely resembles cobblestone, your best option is bricks or pavers. Both cost anywhere from $10 to $50 per square foot and can be laid in all kinds of patterns. Depending on the type of paver you choose, you can also get a good bang for your buck by investing in durable natural stone.

Scorpions have difficulty climbing smooth, non-porous surfaces like clean glass or polished metal because their pincers and feet cannot grip the surface effectively. While they are excellent climbers on rough or textured materials such as wood, stucco, or brick, slick surfaces prevent them from gaining traction or anchoring themselves. If you're trying to scorpion-proof parts of your home, using smooth materials for barriers or containers can be an effective deterrent strategy.

A concrete base—or concrete footings, more specifically—is necessary for a freestanding pergola build. A pergola is top-heavy and can’t stand on its own, so it will always need some type of base or support. If you’re attaching a pergola to a deck, the deck’s supportive joists will act as the support, so there will be no concrete base or footings necessary.