CoatingsPro Magazine Supplements

Concrete Dec 2017

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26 CONCRETE COVERED 2017 COATINGSPROMAG.COM that folds itself back into its own matrix, which can then be completely densified. Refining or polishing dry will not allow the surface of the overlay to be fully processed, as there is no slurry to fill in the voids. Dry processing, therefore, may require the use of acrylic or latex-based grouts to fill those pits. ese types of grouts have fantastic temporary aesthetic applications, but because they are not cement-based, they will not react with densifiers to create the C-S-H (calcium silicate hydrate) bond, which ultimately gives the floor its long-term strength and beauty. Using wet refinement on your project site may also be helpful in meeting new Occupational Safety and Health Administration (OSHA) regulations that limit silica dust exposure to construction personnel. In lieu of a polishing process, you may also choose to stamp your overlay with similar texture-stamp mats used for concrete. ese can be deployed to produce textures that mimic brick, stone, or other custom finishes. Finally, color applications (e.g., stains, dyes, and pigments) can be used to enhance the look of the floor as well as aggregates usually associated with epoxy terrazzo-like finishes. W hile maintenance for concrete overlays is dependent on exposure conditions and the amount or type of traffic overlays receive, they will always require routine mainte- nance to sustain their aesthetic and physical performance benchmarks. For interior floors, wet mopping or dry dust mopping is needed to keep the floors clean and free from grit and other abrasive contaminants that can damage the floor. You should also consider using cleansers that will not break down the floor through chemical etching (i.e., chemical attacks on the C-S-H binders). Check with the manufacturer for recommended maintenance, but be wary of manufacturers making claims of " little or no" maintenance. Surface Possibilities Floors are the most "abused" surfaces in most facilities, and they need to be cared for regularly. You can use cement-based overlays to create beautiful, durable surfaces, but you need to be sure to choose the right system for your project, install it properly, and maintain the floors correctly after installation. CP Austin Morrison, ISCS, is a veteran f loor ing cont ractor and par t ner at Elegant Pol ishing out of New Haven, C T. He has e x tensive e x per ience w it h pol ishing and overlay f loor ing systems in t he commercia l const r uct ion market. He has a lso been a technica l lead and inst r uctor for t he Inter nat iona l Societ y of Const r uct ion Sciences (ISCS). For more infor mat ion, contact: Elegant Concrete Pol ishing , info@elegant pol ishing.com Concrete Overlay When dealing with cement-based overlays, it's important to use many of the same procedures that are used when creating a concrete slab. Rock, glass, and other decorative aggregates may be added to cement-based overlays to add variety to your floor design Protecting and maintaining overlays can just be as important as how they're created. Floors are often the most "abused" surfaces, so they should be cared for properly.

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