A grit (or sand) blasted finish is typically a rougher and deeper-textured finish than an etched finish. With this finish, the surface layer of concrete is removed to expose the aggregate (stone) in the concrete mix. . The depth of the blasting can be varied to allow a smooth to coarse texture. The aggregate selection, as well as the matrix colour, has a significant effect on the final appearance.
The finish is achieved using a technique using compressed air to propel various particles (e.g. granulated furnace slag, aluminium oxide, glass beads) onto the concrete surface. The process is also referred to bead blasting where larger beads are used.
