The Numbers Don't Lie

CRMX 3-Step Polishing System is concrete’s first application of a process common in high-precision industries like metalworking, optics, and dentistry. Abrasives are in liquid that’s poured on the floor instead of diamond tools. Although contractors can use auto scrubbers, buffers, grinders, and other equipment they already own, the process takes 40% less time than conventional polishing methods.

The process is faster than conventional polishing because the contractor uses the same three tools for every project instead of choosing hard, medium, or soft bond tools depending on concrete hardness. Step 1 (left), Step 2 (center), and Step 3 (right) tools are manufactured by GMI Engineered Products LLC in Bluffton, Ohio.

Also called a t-meter or contact stylus profilometer, the texture meter makes polishing virtually foolproof. Instead of gloss level or sheen, polisher performance is judged by surface texture as defined in Standard ST-115 (Measuring Concrete Micro Surface Texture). Before moving to the next step, the contractor must use the t-meter to confirm the recommended roughness average (Ra) was achieved.

A t-meter reading of 100 roughness average (Ra) indicates a honed finish; zero indicates a mirror-like finish. The three-step CRMX process takes the concrete surface from an Ra of 97.9 to 28.05 to the 4.25 shown here.

Step 2 uses a composite tool and chemical refining agent to achieve roughness average (Ra) of 28.05. Then the floor is thoroughly cleaned using an autoscrubber.

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