Concrete slabs are flat, horizontal surfaces made from a mixture of cement, water, and aggregates like sand and gravel. They are commonly used in construction for floors, foundations, and pavements due to their strength and durability. The thickness of a concrete slab can vary depending on its intended use, ranging from a few inches for residential floors to several feet for industrial applications. These slabs can be poured on-site or precast in a factory setting. Precast concrete slabs are manufactured in controlled environments, allowing for consistent quality and faster installation. Both types are essential in building structures, providing a solid base for various construction projects.