Wet cutting is one of the most effective way of eliminating generation of dust when cutting.
Cutting is an activity that cannot be ruled out in the construction industry. It comes with its inherent hazards like dust generation, noise, vibration, fire, exposure to sharp edge (Cutting disc) and musculoskeletal hazard.
Among all the hazards highlighted, none can be completely eliminated except for dust generation. All others can be managed with administrative control or personal protective equipment.
Knowing the health effect of concrete dust, it is wise to protect ourselves against it.
From my experience, wet cutting is the only and most effective way of eliminating dust generation during cutting.
A worker once told me on site that wet cut spoil the cutting disc faster; I never believed that.
To me, wet cutting is the best thing to do.
Concept of wet cutting
Wet cutting of concrete can be done using either an angle grinder or the cut off saw.
The cut off saw has a facility where you can connect a pump to intermittently pump water into the cut off saw. This water will be release while cutting as far as the cut off saw tap is turn on. Check the picture below – The point where the water hose is being connected.
I know someone will ask, how about the cutting machine that do not have this facility?
The angle grinder do not have the facility for connecting a pump, but wet cutting can still be improvised.
This is what we do: We bore holes on the cover of a bottle water plastic, then fill the plastic with water. As the cutting is going on, someone else will be there to be spraying it with the water. This method will require additional personnel.
Wet cutting is very important since it will eliminate exposure of worker and other people around the area to concrete dust.
See wet cutting video here.