Concrete is made of which four components?

Concrete is primarily made up of cement, sand, gravel, and water. Cement acts as the binding agent that holds the other components together, while sand and gravel provide the aggregate necessary for strength and stability. Water is crucial as it initiates the chemical reaction with cement called hydration, which allows the concrete to harden and develop its strength.

The inclusion of air, soil, clay, or additives in the other choices do not accurately represent the four core components of concrete. While additives may enhance specific properties of concrete, they are not considered one of the primary constituents. Understanding this composition is essential for anyone involved in construction, as it helps in producing a durable and effective concrete mix suited for various structural requirements.