Discover the process and benefits of this impressive exterior finish
Sandblasted concrete finish is a popular choice for patios due to its natural appearance and non-slip characteristics. In this article, we’ll take you through the process of creating a sandblasted concrete patio, from preparation to final sealing. Additionally, we will explore the advantages of choosing this finish for your outdoor spaces.
Site Preparation
The first step in any concrete project is site preparation. In our case, this involved installing formwork to define the patio area, as well as laying out the reinforcing mesh. The reinforcing mesh is placed without the use of “chairs” as workers lift the mesh as they pour the concrete, ensuring it remains in the center of the slab.
Used materials
- Concrete (supplied by Concrete Service)
- 3/8 inch reinforcement mesh
- Surface retarder
- Acid to eliminate efflorescence
- concrete sealer
Concrete pouring
The work crew begins pouring the concrete, which is a physically demanding task. The concrete is carefully distributed and leveled to ensure a uniform surface. Once the concrete is in place, a surface retarder is applied. This product prevents the top layer of concrete from hardening, allowing the fine aggregate (sand) to be exposed after washing.
Surface Retarder
The surface retarder is crucial to achieving the sandblasted finish. This chemical is applied to fresh concrete, stopping the setting process in the outermost layer. After a few hours, when the concrete is hard enough to walk on, this layer is washed with water and brushed away to reveal the sand just below the surface.
Washing and Finishing
After applying the retarder, the team waits for the concrete to be firm enough to proceed with washing. Using a hose and brushes, they remove the surface layer of concrete, exposing the fine aggregate. This process reveals a textured surface that is not only visually appealing but also slip-resistant, making it ideal for patios and pool areas.
Acid Application
To remove any efflorescence (salt and mineral deposits that may appear on the concrete surface), an acid solution is applied. This step ensures that the color and texture of the concrete remains uniform and free of stains. The acid is left to act for a short period and then rinsed off completely.
Concrete Sealing
The final step is the application of a sealant. This not only protects the concrete surface from stains and damage, but also enhances the natural color of the exposed sand. On this project, three coats of sealant were applied in a single day, tying all finishing steps into one continuous, efficient process.
Benefits of Sandblasted Concrete Finishing
- Natural Appearance: The sandblasted finish provides a rustic, natural look that blends perfectly into outdoor settings.
- Non-slip: The exposed texture of the sand offers excellent traction, reducing the risk of slipping.
- Low Maintenance: This type of finish is durable and easy to maintain, ideal for high traffic areas.
- Versatility: Can be combined with other decorative finishes such as stamped concrete to achieve custom designs.
Conclusion
The sandblasted concrete finish is an excellent option for those looking for a durable, attractive and safe solution for their patios. The process, although complex, is done efficiently with the right expertise, as demonstrated by the experts at Night Construction on this project. You will not only get a beautiful outdoor space, but also a practical and durable surface.
If you are considering a similar project, do not hesitate to contact professionals who can guide you through the process and ensure a high-quality result. Transform your patio with a sandblasted concrete finish and enjoy its benefits for years!
Frequent questions
What is sandblasted concrete?
It is a type of finish in which the top layer of sand in the concrete is exposed, providing a textured, non-slip surface.
How long does it take to complete a sandblasted finish project?
Time may vary depending on the size of the project, but can generally be completed in one or two days of continuous work.
Is sandblasted finish suitable for all outdoor areas?
Yes, it is particularly useful on patios, sidewalks and pool areas due to its non-slip properties and natural appearance.
Thank you for reading! If you have any questions or need advice for your next concrete project, do not hesitate to contact us.
