1. A milky or cloudy deposit that forms on the surface of freshly poured concrete, consisting of cement, fine particles, and water.
Usage: technical; construction/concrete industry term; plural form of laitance

Examples

• The contractor removed the laitances from the concrete surface before applying the sealant.
• Laitances can reduce the bond strength between concrete layers if not properly cleaned.
• The concrete finisher used a wire brush to eliminate laitances and expose the aggregate.
• Proper curing procedures help minimize the formation of laitances on the concrete deck.