Concrete component is a term used to describe the three main ingredients used in making concrete: SAND, CEMENT, and GRAVEL. SAND is a granular material composed of finely divided rock and mineral particles, usually found in beaches and deserts. CEMENT is a binder, a substance that sets and hardens independently, and binds other materials together. GRAVEL is a loose aggregation of rock fragments, which are typically used for construction purposes. Together, these three components form the basis of concrete, a strong and durable building material.