Aggregate is defined as which materials used in pavements?

• A. Asphalt binder and additives
• B. Rocks, stone, gravel, and sand used in pavements and pavement treatments
• C. Recycled materials used in roads
• D. Concrete for subbase

Answer: (B)

Aggregate refers to the granular, mineral part of pavement materials—the rocks, stone, gravel, and sand that form the structural bulk of bases, subbases, and the mineral component of asphalt mixtures. This material is chosen for its strength, durability, proper gradation, and cleanliness, and it works with the binder to carry loads and resist wear. The listed option matches this definition by naming rocks, stone, gravel, and sand and noting their use in pavements and pavement treatments. The other choices describe the binder (asphalt binder and additives) or cementitious materials (concrete for subbase), or refer to recycled components without defining aggregate itself.