Bull floating is done:

Bull floating is done:

• A. Immediately after screeding
• B. Before screeding
• C. During placement
• D. After final finishing

Answer: (A)

Bull floating is done immediately after screeding because the concrete is still plastic and can be easily leveled and compacted to bring the cement paste to the surface. This timing lets you smooth out high spots, close surface pores, and create a uniform cream on top before bleed water appears and before the mix stiffens. If you wait, the surface can start to stiffen or laitance can form, making floating less effective or even sealing imperfections. Doing it before screeding or during placement doesn’t establish the proper surface plan, and finishing after final finishing would mar the surface since the concrete would be set.

Bull floating is done immediately after screeding because the concrete is still plastic and can be easily leveled and compacted to bring the cement paste to the surface. This timing lets you smooth out high spots, close surface pores, and create a uniform cream on top before bleed water appears and before the mix stiffens. If you wait, the surface can start to stiffen or laitance can form, making floating less effective or even sealing imperfections. Doing it before screeding or during placement doesn’t establish the proper surface plan, and finishing after final finishing would mar the surface since the concrete would be set.