Exposed aggregate concrete is a popular choice for modern driveways and walkways due to its durability, slip resistance, and attractive appearance. The unique surface, which reveals the natural beauty of embedded stones or pebbles, requires proper maintenance and cleaning to preserve its aesthetic appeal and structural integrity. Here’s a guide on how to maintain exposed aggregate concrete to keep it looking its best for years to come.
Regular Cleaning to Prevent Buildup
One of the key aspects of maintaining exposed aggregate concrete is regular cleaning. Over time, dirt, grime, and organic matter like leaves and animal droppings can accumulate on the surface, dulling its appearance. Cleaning your concrete surface at least once every few months will prevent buildup and keep it looking fresh. To clean the surface, you should:
- Sweep regularly: Remove dirt, leaves, and debris from the surface using a broom or a leaf blower.
- Use a mild detergent: Mix a gentle detergent with water and apply it to the concrete surface. Scrub the area with a soft-bristle brush to lift dirt and stains.
- Pressure washing: For tougher stains or large areas, a pressure washer can effectively remove grime. Use a low and medium-pressure setting to avoid damaging the aggregate surface. Start at a distance and gradually move closer until the dirt lifts without dislodging the exposed stones.
Seal the Surface for Protection
Sealing exposed aggregate concrete is one of the most important maintenance tasks. Sealing protects the surface from moisture, UV rays, stains, and wear, ensuring that the concrete retains its vibrant look and resists cracking or pitting. Ideally, the surface should be sealed every one to three years, depending on the level of wear and exposure to the elements.
- Choose a high-quality sealer: There are different types of sealers for concrete, including acrylic, penetrating, and film-forming sealers.
- Apply the sealer properly: Clean the surface thoroughly before applying the sealer to ensure it adheres well. Use a roller or sprayer to evenly distribute the sealer, and apply it on a dry day to allow for proper curing.
Remove Stains Promptly
Despite being durable, exposed aggregate concrete can still be stained by oil, grease, or rust. To maintain its appearance, it’s essential to treat stains as soon as they occur.
- Oil stains: Apply a degreaser or dish soap directly to the oil-stained area and scrub with a stiff brush. Let it sit for a few minutes, then rinse with water.
- Rust stains: Rust can be removed using a rust remover specifically designed for concrete. Apply the product according to the instructions, scrub gently, and rinse thoroughly.
- Organic stains: For these stains, a mixture of water and vinegar can be applied to the affected area. Scrub the surface with a brush and rinse with water.
Avoid Harsh Chemicals
While cleaning exposed aggregate concrete, avoid using harsh chemicals like bleach, ammonia, or acidic cleaners. These can damage the sealer or the aggregate itself. Opt for eco-friendly cleaners or those specifically designed for use on concrete surfaces.
Repair Cracks and Chips
Over time, the exposed aggregate driveway may develop small cracks or chips due to its exposure to the elements plus traffic from vehicles and people. It’s important to repair these as soon as possible to prevent them from spreading. Use a concrete patching compound to fill the cracks, and reseal the area once the repair is complete to protect it from further damage.
Maintaining and cleaning exposed aggregate concrete is essential to preserving its beauty and durability. With regular sweeping, occasional pressure washing, prompt stain removal, and periodic sealing, you can keep your exposed aggregate surfaces looking great for years.
If you’re located in Victoria, VIC MIX is here to provide for your needs. Contact us for inquiries or request a quote on a specific type of concrete mix. If you wish to see our concrete designs in person, visit one of our showrooms in Dandenong, Coburg, Pakenham, and Mornington. We look forward to building lasting relationships and contributing to the success of your projects.