The components of concrete are Portland cement, sand, and what?

The components of concrete are Portland cement, sand, and what?

• A. Water
• B. Fibers
• C. Aggregate
• D. Rebar

Answer: (C)

Concrete is a binder system where cement paste, formed by hydration with water, holds together aggregates to create a strong, volumetric material. Sand acts as a fine aggregate that fills gaps and improves workability, but the mix also needs larger particles to provide bulk, strength, and economy. That larger-particle component is aggregate, which includes coarse material like gravel or crushed stone. So the missing piece is aggregate, covering the coarse aggregate complement to the sand already in the mix.

Concrete is a binder system where cement paste, formed by hydration with water, holds together aggregates to create a strong, volumetric material. Sand acts as a fine aggregate that fills gaps and improves workability, but the mix also needs larger particles to provide bulk, strength, and economy. That larger-particle component is aggregate, which includes coarse material like gravel or crushed stone. So the missing piece is aggregate, covering the coarse aggregate complement to the sand already in the mix.