What curing practice helps prevent surface dusting?

What curing practice helps prevent surface dusting?

• A. Proper curing regimen.
• B. Short curing period.
• C. Finish with high abrasion.
• D. Wet surface after curing.

Answer: (A)

Maintaining moisture during the early life of concrete is essential to prevent surface dusting. When the surface dries out too quickly while the paste beneath is still hydrating, a powdery veneer forms that can dust off. A proper curing regimen keeps the surface moist and at a suitable temperature for the recommended duration, allowing hydration to proceed evenly and producing a tougher, less dusty surface. Short curing periods or finishing with high abrasion can expose or remove the weaker surface layer, increasing dusting risk. Wetting the surface after curing doesn’t address the underlying hydration balance, so the best practice is a well-planned curing regimen.

Maintaining moisture during the early life of concrete is essential to prevent surface dusting. When the surface dries out too quickly while the paste beneath is still hydrating, a powdery veneer forms that can dust off. A proper curing regimen keeps the surface moist and at a suitable temperature for the recommended duration, allowing hydration to proceed evenly and producing a tougher, less dusty surface. Short curing periods or finishing with high abrasion can expose or remove the weaker surface layer, increasing dusting risk. Wetting the surface after curing doesn’t address the underlying hydration balance, so the best practice is a well-planned curing regimen.