After being screeded, large slabs are flattened with a bull float. Bull-floating also pushes the coarse aggregate down and brings up the finer, more easily finished “cream.”
After edging and bull-floating or magging is done, the slab is allowed to sit. Excess, or “bleed,” water comes to the surface and evaporates.
When the slab is hard enough that a trowel won’t dig in, it’s steel troweled to compact the surface.
Knee boards (here made of rigid foam, but usually of plywood) keep workers from sinking in the center of a large slab.