Name two common curing methods.

• A. Moist curing (water or wet burlap) and curing compounds
• B. Air-drying
• C. Evaporation
• D. Sealing only

Answer: (A)

Concrete cures through hydration, which needs moisture to continue during the early hardening period. The two common ways to ensure that moisture is kept available are moist curing and using curing compounds.

Moist curing means keeping the surface and surrounding area wet, such as with water or covering the concrete with damp materials like wet burlap. This directly provides the water the cement needs to hydrate and develop strength, helping to minimize shrinkage cracks and ensuring more uniform curing.

Curing compounds are surface-applied barriers that slow moisture loss from the concrete. They’re convenient when a continuous water supply isn’t practical, as they seal in moisture and let hydration proceed more evenly beneath the film.

Why the other options aren’t typical curing methods: air-drying and evaporation describe moisture loss, which hinders proper hydration, not promotes it. Sealing only can help after an initial curing period but doesn’t by itself supply the necessary moisture during the critical early days.