Which concrete finish is achieved by removing the top layer to expose aggregate?

The exposed aggregate finish is achieved by removing the top layer of concrete to reveal the aggregate particles within. This process typically involves the use of water and a pressure washer or other techniques to wash away the cement paste that covers the aggregate. This type of finish is popular for its aesthetic appeal, as it highlights the natural stones or decorative aggregates used in the mix, providing a textured look and a non-slip surface.

In contrast, a smooth finish is created by troweling the surface to a fine, even texture, without exposing the aggregate. The broom finish is made using a broom to create fine lines in the surface which improves traction but does not expose aggregate. A stamped finish involves applying patterns or textures to the surface of fresh concrete using stamps, which does not result in aggregate exposure. Each of these finishes serves different purposes and aesthetic preferences, but the distinguishing feature of the exposed aggregate finish is its method of revealing the aggregate, making it a unique and desirable choice in many applications.