A quick note explaining the difference between wet and dry methods
to polishing concrete.
The wet polishing process uses water to cool the diamond abrasives and
eliminate dust that naturally occurs during the grinding process.
Water reduces friction and acts as a lubricant so it increases the life
of the polishing abrasives, particularly the resin-bonded disks which
can melt at high temperatures. One of the disadvantages of using the
wet process is that it is messy. Crews must collect and dispose of the
slurry that is generated and this slows productivity. A slurry paste is a
mixture of ground concrete and water. It is a by-product of wet
grinding. It must be vacuumed from the floors throughout the wet
grinding process to minimize risk of injury due to slipping. Crews then
collect and dispose of that waste in bags.
Dry polishing on the other hand, does not use water and crews often
use dust containment systems, to minimize respiratory hazards
caused by airborne concrete dust, that eliminate the mess. Typically
dry polishing is used early in the grinding process and when the
surface becomes smoother and crews switch from the metal bonded
to finer resin bonded diamond abrasives, they generally change to wet polishing.