Concrete is a versatile and widely-used construction material composed of a mixture of cement, water, aggregates (such as sand, gravel, or crushed stone), and sometimes additives or admixtures. Its exceptional strength and durability make it a preferred choice for a variety of construction applications, including buildings, bridges, roads, and infrastructure projects. The key ingredient, cement, undergoes a chemical reaction with water, creating a strong bond that binds the aggregates together. Once cured, concrete forms a solid and rigid structure capable of withstanding significant loads and environmental conditions. Pack of 12 samples.