Monday, March 2, 2009

Coloring your Polished Concrete

By Mercie Hallow

Have you ever wondered why there are concrete floors that have colors in it? How was it possible that a grey concrete was able to have a color or a design in it? These questions are answered and made possible through the process of staining on concrete polishing. Concrete stains are solutions to achieve a decorative concrete surface. Concrete stains come in different types and applications.

Probably one of the famous methods of coloring a concrete surface is through the use of colorants which are added to the concrete prior to the drying process. Colorants are combined with the concrete aggregates until it dries thus forming a colored concrete surface. Colorants such as these are commonly called iron oxide pigments. Iron Oxide pigments come in variety of colors and are first used in prehistoric cave dwellings.

Acid staining is a process of concrete coloring that are widely being used nowadays because of its aesthetic appeal and economic savings. The color is produced by combining an acid solution of water, acid and salt onto the newly prepared concrete surface. The acid solution reacts with the concrete (preferably the lime content in it) thus producing a unique marble-like color in the surface.

Before the application of acid staining on the concrete surface there are several steps to do to prepare the concrete. First is that the concrete needs to be thoroughly clean and void of loose aggregates. Loose aggregates do not accept staining. Previously acid stained concrete is also grounded to remove previously stained surface.

Water based stains on the other hand are tints, shades or dyes and thus the process is entirely different with acid staining. Water based stains are directly poured or applied on a newly prepared concrete surface. The stains produce a range of colors from translucent to opaque hues. Water based stains are more appropriate to use when a definite design is to be achieved on a concrete floor. - 15615

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