The two popular options when it comes to the finish for your driveways, pool areas, or outdoor spaces include exposed aggregate and coloured concrete.
The creation of exposed aggregate concrete finishes involves the removal of the top layer of cement paste to reveal the natural stones or aggregates of the concrete. Coloured concrete, on the other hand, uses colour additives in the concrete mix, which changes the overall colour of the concrete.
But which finish between exposed aggregate and coloured concrete is better? This is what this blog is all about. So stay with us to make the right selection for your precast concrete product finishes based on factors like aesthetics, costs, maintenance requirements, slip resistance, and more.
In this article
- A Brief Comparison Between Exposed Aggregate vs Coloured Concrete
- What Is Exposed Aggregate Concrete?
- What Is Coloured Concrete?
- Exposed Aggregate vs Coloured Concrete: Key Differences
- Which Finish Should You Choose?
A Brief Comparison Between Exposed Aggregate vs Coloured Concrete
In the case of exposed aggregates, the decorative effect results from the stones or aggregates that are visible on the surface. This results in a more natural texture with a multi-tone appearance.
In coloured concrete, the pigments that appear on the concrete’s surface are what result in uniform aesthetics. Both of these options differ in their appearance, texture, care, and durability. Here is a table to help you understand it better.
| Exposed Aggregate Concrete | Coloured Concrete |
| It has a natural stone-like appearance with a rough texture. | It has a colour-focused appearance with a smooth texture. |
| The colour depends on the aggregate selection. | The colour depends on the pigments you select. |
| The textured surface results in better slip resistance. | The slip resistance may be high or low based on the surface finish. |
| The maintenance requires sealing or regular care. | The colour requires regular care. |
| Offers great durability. | The durability is comparable to exposed concrete if the installation is done right. |
| It costs more than coloured or basic concrete finishes. | Costs less than exposed aggregate finishes. |
| It works best for driveways, pools, paths, or patios. | It works best in patios, entertaining areas, driveways, and paths. |
What Is Exposed Aggregate Concrete?
It refers to a popular decorative concrete finish where the aggregates of the concrete, such as crushed rocks or pebbles, become visible on the surface.
Unlike in traditional concrete, where cement, sand, and water create a layer over aggregates, in exposed aggregate, the top layer is removed once the aggregates are in place. This reveals decorative stones on the surface, resulting in a unique finish with distinctive textures.
To create such a finish, first you create a compact gravel base. Then you erect the formwork. Now you can pour the concrete with decorative stones or aggregates on the site. To prevent the upper layer from hardening too fast, you spray a surface retarder.
Once the lower concrete sets, you can use water or a soft broom to get rid of the upper layer of paste. Finally, you apply a concrete sealer to protect the precast concrete surface and to further refine its appearance.
What Is Coloured Concrete?
This unique concrete finish uses pigmented concrete to create aesthetic floors or walls. In this case, you incorporate the colour into the concrete mix or apply it afterwards to get a uniform final look.
The colour variety in this case is very wide. Some popular options include earthy browns, charcoal tones, red, cream, beige, and warm terracotta. You can create unique patterns or textures over coloured concrete to further add a rich character to the finish.
Exposed Aggregate vs Coloured Concrete: Key Differences
To understand what really sets exposed aggregate and coloured concrete apart, here are some key points you need to consider.
Appearance and Design
The surface of exposed aggregate concrete has visible decorative stones which create a rich visual character. The concrete in this case appears as a combination of different textures, which makes it perfect for properties where you need to create natural but premium outdoor aesthetics.
Coloured concrete doesn’t highlight individual stones. It instead creates an overall visually appealing surface with unique colour combinations. This finish easily blends with diverse property palettes.
Durability
The durability of exposed aggregate and coloured concrete is comparable. Exposed aggregate concrete is a slightly more reliable choice in areas with high foot traffic. Its textured surface can bear heavy impacts and disguise minor damage.
The surface durability of coloured concrete is also impressive. However, its colour fades over time, especially when you use it in areas with harsh weather.
Slip Resistance
The textured surface of exposed concrete results in excellent slip resistance in areas like pathways, pools, and driveways. Coloured concrete, on the other hand, has less slip resistance unless you add textures or slip-resistant finishes over these surfaces.
Maintenance Requirements
For exposed aggregate concrete to last longer, you need to sweep or wash it regularly. You also need to apply a sealer over its surface from time to time.
For the maintenance of coloured concrete, you need to wash it regularly. Get rid of stains as soon as you notice them. You also need to reseal this concrete often to make sure it never loses its colour.
Cost Considerations
The cost of exposed aggregates is much higher. The preparation of this finish includes aggregate selection and careful installation. You also have to spend money on surface exposure, finishing, and sealing. The maintenance of this concrete is also more expensive.
Coloured concrete is economical. This is because you simply need to add a pigment to the top layer or fresh wet concrete to get this finish. The cost can increase if you add additional textures or finishes to this concrete.
Which Finish Should You Choose?
The choice between these concrete finishes depends mainly on the purpose of the finish or your aesthetic goals. You can install exposed aggregate concrete if you prefer precast concrete architectural structures with natural stone-like finishes.
Exposed aggregate concrete works best in driveways, slopes, pool areas, walkways, or outdoor patios where you need finishes with high slip resistance.
Coloured concrete, on the other hand, is a better option if you prefer surfaces with uniform or cleaner finishes. This concrete is also a good option when you need to add a specific colour to the space to create visual harmony. Coloured concrete coordinates well with most interior or exterior finishes, and that is what makes it a suitable option.
This concrete is more suitable for courtyards, outdoor entertainment areas, porches, interior floors, or architectural borders where flat or smooth surface finishes are the top priority.
Conclusion
Exposed aggregate concrete and coloured concrete stand out in terms of their appearance, feel, costs, intended purposes, and maintenance. Exposed aggregate concrete results in a textured stone-like appearance that adds a subtle character to the finish.
Coloured concrete creates understated but visually stunning finishes that complement most interior or exterior spaces. To make the right choice between these two, you need to go way beyond visuals. You can consider your interior or exterior design, budget, maintenance ease, lifestyle, and the level of slip-resistance you need to make a more informed choice.
This can help you pick a finish that not only complements your space but also results in long-term usefulness, safety, and performance reliability.
Visit us at Naran Precast Concrete Co. today to order our premium-quality exposed aggregate and coloured concrete products in a wide range of mixes or styles. Our fully customised concrete solutions create durable and wear-resistant finishes for outdoor/indoor floors, pavements, driveways, and walls of all commercial and residential projects all over the UAE.