A concrete slab should be bull floated as soon as possible after

• A. Placing
• B. Screeding
• C. Edging
• D. Floating

Answer: (B)

Bull float is done right after the concrete has been evenly leveled with the screed. Screeding creates a true, level plane and brings the excess moisture and cement paste to the surface. From there, bull floating consolidates the surface, pushes down any high spots, and brings the cream to the top, giving a smoother, more uniform surface before it begins to harden. If you wait, the concrete stiffens and becomes harder to smooth, leading to a rougher finish with more small imperfections. Placing happens before screeding, edging comes later for shaping the edges, and other floating steps occur in their own time—the immediate post-screed bull float is the right moment to start refining the surface.