Bull Float

The screeding process will leave slight ripples on the concrete surface. For some applications this is acceptable as the texture can increase the effective slip resistance on slopes and ramps. Screeding with vibration also causes a less desirable effect. The intensity of vibration at the surface can cause a separation of the aggregate and cement. The heavier particles including the sand sink below the surface leaving a thin layer of brittle cement on the surface. This is often referred to as µlaitance¶ or fat¶ When the concrete is still in a plastic state the surface can be remixed and surface irregularities smoothed out using a Àoat. This process is Tuick and easy if the right tools are used. A wide Àoat blade is pushed and pulled across the slab using a long handle so the operator can work the slab from the sides. Floats can also incorporate a brush to reintroduce a texture to the concrete surface.