What is a potential effect if bleed water is not managed before finishing?

• A. It can cause surface dusting or a weak surface
• B. It increases surface hardness
• C. It accelerates curing
• D. It improves finish

Answer: (A)

Bleed water shows that the surface is still plastic and carrying cement fines to the top. If you finish while that water is on the surface, you trap moisture and fine material under the finish, creating a laitance layer that is weak and powdery. This weak, paste-like surface can dust off easily and won’t develop a solid, durable top layer. To prevent it, wait for bleed water to evaporate or be absorbed, or remove the water and fines before finishing, then proceed with finishing and proper curing. That’s why surface dusting or a weak surface is the potential effect.