Which tool is used to finish concrete that requires a dense and smooth finish?

• A. Float
• B. Steel trowel
• C. Finishing broom
• D. Edger

Answer: (B)

To achieve a dense, smooth finish on concrete, the steel trowel is used. After the surface has set enough to support it, the steel trowel is worked across the surface with light, even pressure to compact the top layer, push moisture out, and polish the paste. This sequence tightens the concrete’s surface, reducing porosity and producing a glassy, hard finish when done correctly. It’s typically applied after initial leveling and floating, in one or more passes, to build that dense, slick look.

The other tools serve different purposes: a float (wood or magnesium) levels and smooths the surface early on and leaves it a bit textured; a finishing broom creates a textured, slip-resistant surface; an edger trims and rounds the edges. For a dense, smooth finish, the steel trowel is the best choice.