Exposed Aggregate Concrete: Using Retarder, 5 Gallon
The Exposed Aggregate Retarder is for those who want to create decorative exposed aggregate finishes. This product is to be sprayed on one coat to retard the mortar set time so you don’t have to sandblast or acid wash.
Easy to apply with standard pressurized spray equipment, brush or roller. Bon Tool 32-302 Exposed Aggregate Retarder leaves no surface finish so it’s a natural, seamless look and feel.
Covers 100 sq.ft. per gallon. Low VOC formula. Environmentally friendly compared to other products on the market.
Exposed Aggregate Retarder comes in 5 gallon container. Perfect for larger projects and less frequent restocking. For DIY homeowners looking to update their outdoor space or professional landscapers and contractors to offer their clients a high quality and cost effective solution for exposed aggregate finishes.
In short the Exposed Aggregate Retarder is a must have for anyone wanting to create beautiful outdoor spaces without the big bucks. Easy to apply, low VOC and covers 100 sq.ft. per gallon.
Introduction
Exposed aggregate concrete is a popular choice for outdoor surfaces because of its durability, beauty and slip resistance. Exposed concrete is a type of washed concrete finish that features visible aggregates like pebbles, rocks and sand. It’s achieved by exposing the aggregate (pebbles) in the concrete, creating a unique and textured finish. In this article we will go over the benefits, design and installation of exposed aggregate concrete and how to maintain and seal the surface.
What is Exposed Aggregate Concrete?
Exposed aggregate concrete is a decorative concrete that involves exposing the aggregate (pebbles) in the concrete. Decorative aggregate is chosen for its beauty so you can have a unique and artistic finish. This is done by removing the top layer of cement paste to reveal the aggregate underneath, creating a textured and slip resistant surface. Exposed aggregate concrete can be made with various types of aggregate such as crushed stone, shells, pebbles, decomposed granite, recycled glass, quartzite, salt rocks, basalt and limestone.
Benefits of Aggregate Concrete
Exposed aggregate concrete has several advantages over regular concrete surfaces. It’s durable and long lasting, wear and tear resistant and has a unique and textured finish. The exposed aggregate surface is also good traction and slip resistant making it a safe choice for outdoor surfaces. Exposed aggregate concrete is low maintenance, only needs occasional sealing to maintain its appearance.
Design and Installation
Design and installation of exposed aggregate concrete involves several steps. First the area is prepared by laying down a layer of compacted gravel or sand. You need to have prior experience in mixing cement and laying concrete to achieve the desired result. Then a layer of concrete is poured and screeded to create a smooth surface. The aggregate is then seeded onto the surface of the concrete and the concrete is troweled smooth to create a flat finish. The surface is then allowed to firm up before exposing the aggregate.
Using a concrete retarder will help you manage the timing of the exposure process. Exposed aggregate pavers have advantages over poured concrete such as versatility and low maintenance. While poured concrete has its merits, it lacks the flexibility of exposed aggregate such as being able to replace or move individual pavers.
Using a Retarder
A retarder is a chemical additive that slows down the setting of the concrete, giving you more time to work with the material. When working with exposed aggregate concrete, using a retarder is especially beneficial. It gives you more working time to lay, finish and expose the aggregate at a more controlled pace. This is especially useful for larger projects or in warmer climates where concrete sets quickly.
One of the biggest benefits of using a concrete retarder is the finish it can achieve. By slowing down the setting process you can get a more even and consistent exposure of the aggregate resulting to a beautiful textured and visually appealing surface. This extra aggregate exposure can make a big difference in the overall look of your project.
However, use concrete retarders carefully. Over retardation can weaken the concrete structure and compromise its durability and longevity. There is also a higher risk of cracking if the concrete is not properly cured. To avoid these problems, always follow the manufacturer’s instruction for dosage and application. Monitor the concrete’s setting process and adjust the retarder dosage as needed. Regular testing can also ensure that the concrete meets the required strength and durability standards.
By using a retarder properly you can get a high quality exposed aggregate finish that is durable and visually appealing.
Exposed Aggregate Concrete Sealer
To maintain the appearance and durability of exposed aggregate concrete it is recommended to apply a concrete sealer. A concrete sealer protects the surface from stains and damage and can also enhance the color and texture of the aggregate. There are several types of concrete sealers available, fully matte, high gloss and everything in between. Choose a sealer that is specifically designed for exposed aggregate concrete and follow the manufacturer’s instruction for application.
Exposed aggregate concrete patio is cost effective in the long run due to its non slip texture and durability. This type of patio can withstand heavy foot traffic and harsh weather, making it a long lasting option for outdoor spaces.
Maintenance and Upkeep
Maintaining exposed aggregate concrete is important to preserve its appearance and extend its life. Regular maintenance will ensure your concrete surface will remain attractive and functional for years to come. Here are some tips to keep your exposed aggregate concrete in top shape:
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Cleaning: Clean the surface with mild detergent and water to remove dirt, debris and stains. A pressure washer can be used for deep cleaning but use it on low setting to avoid damaging the surface layer.
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Sealing: Sealing is important to protect the surface from stains, damage and weathering. Choose a sealer for exposed aggregate concrete and follow the manufacturer’s instruction for application. Sealing will enhance the color and texture of the aggregate and provide a protective layer against the elements.
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Inspections: Inspect the surface for damage, cracking or wear and tear. Early detection will allow for prompt repair and prevent further deterioration and concrete integrity.
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Repairs: Repair any damage or cracks as soon as possible to prevent them from getting worse. Small cracks can be repaired with concrete patching compound, while bigger damage may require professional help.
By following these maintenance and upkeep tips you can keep your exposed aggregate concrete looking beautiful and durable and safe and attractive for your outdoor spaces.
Cost and Budget
The cost of exposed aggregate concrete will vary depending on the type of aggregate, concrete mix and labor cost. Here are the average cost:
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Material Cost: $8 to $12 per square foot. This includes the cost of aggregate, concrete mix and any other materials needed for the project.
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Labor Cost: $2 to $5 per square foot. Labor cost will vary depending on the complexity of the project and the contractor’s experience.
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Total Cost: $10 to $17 per square foot. This is a rough estimate and will vary depending on location, project size and other factors.
When budgeting for your exposed aggregate concrete project consider the following costs:
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Materials: Aggregate, concrete mix and other materials.
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Labor: Laying, finishing and exposing the aggregate.
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Equipment: Rental or purchase of equipment, pressure washer and concrete saw.
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Maintenance: Maintenance and upkeep cost to keep the concrete looking good and long lasting.
For a more accurate estimate contact a professional contractor or supplier. They can give you a detailed breakdown of the cost and help you plan your budget.
Comparison with Other Concrete Finishes
Exposed aggregate concrete is a unique and decorative finish that has several advantages over other concrete finishes. Here’s a comparison to help you understand the benefits of exposed aggregate concrete:
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Stamped Concrete: While stamped concrete can look like stone or brick, exposed aggregate concrete has a more textured and visually appealing surface. The natural look of the aggregate has a rustic charm that stamped concrete doesn’t.
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Polished Concrete: Polished concrete is known for its smooth and modern look. Exposed aggregate concrete has a more natural and earthy look. The exposed pebbles and stones create a unique texture that adds character to any outdoor space.
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Standard Concrete: Standard concrete is functional but lacks the decorative appeal of exposed aggregate concrete. Exposed aggregate concrete has a more durable and visually interesting finish that’s why it’s a popular choice for patios, driveways and walkways.
When choosing a concrete finish:
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Aesthetics: Exposed aggregate concrete has a unique and decorative finish that can add visual appeal to your outdoor spaces.
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Durability: Exposed aggregate concrete is durable and long lasting, perfect for high traffic areas.
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Maintenance: Exposed aggregate concrete requires maintenance but it’s worth it for the beautiful and durable finish.
Now you know the differences.
Exposed aggregate concrete is a decorative and durable finish for outdoor surfaces. By knowing the process, materials and maintenance requirements you can create a beautiful and long lasting exposed aggregate concrete surface. Budget for the cost, compare with other concrete finishes and follow the maintenance and upkeep tips to keep your exposed aggregate concrete looking good and long lasting.
Whether you’re a DIY homeowner wanting to upgrade your outdoor space or a professional contractor looking for a high quality solution for your clients, exposed aggregate concrete is a versatile and beautiful option. With proper planning and care you can enjoy the beauty and durability of exposed aggregate concrete for years to come.