Concrete Polishing - Wet verses Dry Debate

There are companies making claims of "patented dry process" and the like. You will see claims of 99.95 % capture of harmful silica dust. Here's the misleading part. NO portable available vacuum system I have seen will capture close to 99% of the dust generated by heavy grinding, commonly used in the process of polishing concrete. These heavy initial grinding steps are usually done with large platform (32 Inch ) machines that generate huge amounts of harmful silica dust.

Take the time to check out any polishing job where the contractor is using the so called "dust free dry grinding process", and you will see dust all over the floor that somehow escaped their "dust free" process. Think about this, if there is a layer of harmful silica dust left on the floor, what happens to it as cords, hoses, air movement and people walking over it? It stirs up the dust and now its airborne, going into and on anyone present.

Harmful dust gets into air ducts, ready to spew out anytime the furnace or air conditioner comes on.  It can potentially clog air-conditioning coils leading to higher electrical costs. So I ask you from a common sense point, how can this "dry grinding process be considered "green?" The only process OSHA recommends for the best capture of ground concrete is a wet method that keeps the ground concrete from becoming airborne dust. This is the process we use and endorse. We have agreements with some local concrete manufacturers, to recycle our wet "concrete slurry", to be used for road mix or other, diverting this from the landfill.

Craig Walton, Diamond Concrete Polishing
Boise, Idaho
dcpolish.com

 

Silica Dust and Concrete Grinding and Polishing: The Tragedy & the Beauty

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Silica Dust and Concrete Grinding and Polishing: Air Exposure Monitoring and OSHA Permissible Exposure Limits (PELs):

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Benefits of Polished Concrete

Health Issues

LEED US Green Building Council

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