Which statement best describes asphalt?

• A. A tar-like liquid used for roofing
• B. A petroleum distillate residue
• C. A black, glue-like, waterproof material used in paving and roofing
• D. An adhesive made from synthetic polymers

Answer: (C)

Asphalt is the black, glue-like material that acts as the binder in road pavement and also serves as a waterproofing layer in roofing. Its sticky, viscous nature lets it bind crushed stone into a solid, load-bearing surface, while its waterproofing properties keep water from penetrating roofs. It’s a petroleum product derived from the heavy residue left after refining crude oil, which is why it behaves like a stable, workable binder when heated and sets to resist water and traffic loads. This description captures both its adhesive role and its waterproofing function, which are the defining characteristics.

The other descriptions don’t fit as well because they either oversimplify or mischaracterize asphalt. It’s not merely a tar-like liquid used for roofing, since asphalt used in paving and roofing is a petroleum-based binder with specific waterproofing and binding roles. It isn’t a petroleum distillate, as asphalt is a heavy residuum rather than a lighter distillate. And it isn’t made from synthetic polymers, since its base is hydrocarbon-based asphalt binder rather than a polymer adhesive.