Cleaning of Concrete Surface
Cleaning the concrete surface before applying micro surfacing is a crucial step to ensure proper adhesion and the effectiveness of the treatment. Here’s a guide on the cleaning process for a concrete surface before micro surfacing application:
- Debris Removal:
- Begin by removing any loose debris, dirt, or vegetation from the concrete surface. Use brooms, blowers, or other appropriate tools to sweep away loose particles. This step helps create a clean and debris-free surface for the micro surfacing application.
- Power Washing:
- Power washing is an effective method to remove embedded dirt, stains, and contaminants from the concrete surface. High-pressure water jets are used to clean the surface thoroughly. Pay special attention to areas with visible stains or discoloration.
- Oil and Grease Stain Removal:
- Concrete surfaces, especially in parking lots or industrial areas, may have oil or grease stains. Use appropriate degreasers or detergents to treat and remove these stains. Scrub the affected areas and rinse them thoroughly to ensure complete removal.
- Mold and Mildew Treatment:
- If there are signs of mold or mildew on the concrete surface, apply a suitable mold/mildew cleaner or a mixture of bleach and water. Scrub the affected areas and rinse well to eliminate any remaining residue.
- Repairing Cracks and Potholes:
- Before applying micro surfacing, it’s essential to repair any cracks or potholes in the concrete. Use suitable concrete repair materials to fill and level these areas. Ensuring a smooth and even surface helps the micro surfacing adhere properly.
- Surface Drying:
- Allow the cleaned concrete surface to dry completely before applying micro surfacing. Moisture on the surface can hinder the bonding of the micro surfacing material. Ensure adequate drying time based on weather conditions and the specific requirements of the project.
- Surface Profiling:
- Profiling the concrete surface involves creating a rough texture to enhance the adhesion of the micro surfacing material. This can be achieved using specialized equipment that scarifies or grinds the surface to create the desired texture.
- Chemical Treatment (Optional):
- In some cases, a chemical bonding agent or primer may be applied to enhance the adhesion between the concrete surface and the micro surfacing material. This step is project-specific and depends on the conditions of the existing concrete.
- Inspecting for Remaining Contaminants:
- After cleaning and preparation, inspect the concrete surface for any remaining contaminants or irregularities. Address any issues found during the inspection before proceeding with the micro surfacing application.
By thoroughly cleaning and preparing the concrete surface, you create an ideal substrate for micro surfacing, allowing for proper bonding and optimal performance of the treatment. This process is essential for the long-term effectiveness of micro surfacing in preserving and enhancing the durability of concrete pavements.