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Color chart for "overlay" concrete

In this process the color concentrate mixture is applied immediately after the curb is extruded, while the concrete is still wet and capable of fusing with the applied pigmented curb hardener. The exposed surface now has a vibrant, color full veneer, that is actually harder then the underlying concrete curb. This surface is typically much tighter, smoother then extruded curbing without the colored hardener applied. The installer is troweling the material on to a smooth finish. The smooth finish allows for a brighter surface that is easier to maintain and accepts sealer much better. Staining problems are much less common. Efflorescence is also greatly reduced on the exposed surface, as the mineral salts responsible migrate to the backside of the curb, not the “pretty” side. Also, the relatively costly pigments are concentrated on the surface and not “wasted” throughout the entire curb. Plus, by being used in a slurried form, FULL color development of the pigments is much more readily achieved. The most commonly stated drawback to the slurry method is that with the color only on the surface, the underlying grey concrete can be exposed if the curb is damaged. This “problem” is not very frequent and is somewhat negated by the fact that the applied veneer of curb hardener is actually harder (can with stand greater impact) then the underlying curb. Another option is the ability to change, mix or blend colors to achieve varied hues and effects. The customer may choose to have some of curbing made green and that in another location can be red without a change over that would be incurred if the same was required in an integral color install.

Ashler stamp

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