What is an exposed unit?
The exposed unit is a type of concrete pavement in which the gravel used in a mixture of concrete remains visible on the finished surface. While traditional concrete has a smooth surface, the exposed unit offers a highly texture, revealing the natural beauty of stones. This type of surface treatment is one of the oldest forms of decorative concrete that precedes modern etched or washed -out tiles.
Exposed aggregated finishes generally require a little more planning and preparatory work than standard concrete. The installation device must mix the concrete to the correct consistency, use more water than usual. Attention should be paid when choosing an aggregate. While the aggregate usually acts as a fill to provide concrete its strength, is primarily selected for its aesthetic attraction in terms of exposed goals. Installors should check the stone to see if the color, texture and size are not to achieve the desired appearance.
This type of surface treatment is best for lowé operation of the capacity. Exposed aggregated finishes are often selected for terraces and sidewalks, as well as concrete porches. They may also be suitable for some driveways, but are generally not used on roads because they cannot accommodate heavy traffic loads.
The process of laying exposed aggregate begins to pour fresh concrete base. The base is then smooth using a wooden float or spatula. Further, the gravel or aggregated mixture is poured on the concrete and spreads with a rake or a broom. The installation workers use a piece of lumber or concrete float to push the stones into the top of the wet concrete and insert them in place. Finally, the grass cylinder is used to smooth out the surface and remove unwanted lumps or bumps.
The seal is one of the most important steps in the exposed aggregated installation process. Unreated aggregate can get dirty quickly and may wear dÁra Time because of pedestrian traffic. It is also vulnerable to moisture and other outdoor elements.
Installation staff can choose between two basic sealing types, including surface and penetrating products. The penetration seals are the most durable, but also the most expensive. These seals are absorbed into the aggregate, resulting in a matte surface. The surface seals form a thin film through the aggregate, resulting in a wet, shiny look. They are the most affordable options, but they also tend to wear quickly.
buyers should be careful when choosing a seal for exposed unit. While many prefer wet, glossy appearance, this type of gasket often leaves the surface of the concrete quite slippery. Grit or sand can add texture to the sealant, resulting in better traction and reduced risk of falling.