Concrete is a strong building material made from a mixture of cement, water, and aggregates like sand and gravel. When these ingredients are combined, they form a paste that hardens over time, creating a durable substance used in construction. Concrete is widely used for foundations, roads, bridges, and many other structures due to its strength and versatility. The process of making concrete involves mixing the ingredients in specific proportions to achieve desired properties. Once poured into molds, it can take several days to cure and reach its full strength. Concrete can also be reinforced with materials like steel to improve its tensile strength, making it suitable for various applications.