[EXTERNAL] Re: [Ext] [myssmc] #airfiltration #equipment #labsafety


Hi Stan,


In addition to the great suggestions by everyone, using a “Jet” dust collection system normally used at woodshops with the 4” hose right over the mixer will help control the dust at the source. The advantage to this system is that it moves large quantities of air although at lower pressure then a shop vac and has a HEPA pleated filter with a rotating handle to regularly clean the filter and maintain air flow. It is relatively inexpensive. High CFM (HVLP) would be best at controlling ambient dust at the source.

Industrial clear vinyl curtains in addition to dust collection, preferably mounted on rolling frames since you plan to move around, will help in preventing the dust from spreading.

Finally, if you are feeling adventurous and the location allows it, do a wet down on the floor of the area where you will be doing the mixing to control dust on the floor. That would require keeping the floor wet until it can be cleaned.




Elie Merheb

Office of Facilities and Equipment

McArthur Engineering Building

1251 Memorial Drive, Room 219

Coral Gables, FL 33146-0620

elie.merheb@... | coe.miami.edu



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Subject: [EXTERNAL] Re: [Ext] [myssmc] #airfiltration #equipment #labsafety


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Sometimes we have successfully performed similar dirty processes in our spray booth.  Given that you will be moving about, maybe you could do something similar with a tent structure.





On Thu, Jan 14, 2021 at 2:30 PM Stan Johnson via groups.io <ojohnson=iit.edu@groups.io> wrote:

Thanks Michael. I agree that capturing it at the source seems better than trying to deal with it after it spreads into the room. You have a central dust collection system, which I wish we had, but don't. I am doubtful that we can get permission to exhaust to the outside, so we have been looking at filtering systems. The problem there is that it looks like we might be going through a lot of expensive filters.


On 1/14/2021 2:09 PM, Michael Gillhouse via groups.io wrote:



We just have students use a vacuum hose or dust collection hose coming off the main system over the mixer while we pour. Humidifiers and/or spray bottles can mitigate small batch problems but sucking up the dust as it is produced seems to work best. Pulling the bag off the cement instead of pouring it produces less dust too.






On Thu, Jan 14, 2021 at 2:04 PM Stan Johnson via groups.io <stan.johnson59=yahoo.com@groups.io> wrote:

Hello all,
We are planning to do quite a bit of work with concrete and are concerned about the dust. Our lab is about 1400 square feet, but in the past, the dust has spilled out into a lot of the rest of the building which has made quite a few people unhappy. Most of the dust will be created by a portable mixer that will move to different locations in the lab. I was wondering if others had come up with solutions to similar dust problems, whether concrete, plaster, or like materials?

John Kriegshauser
Architecture Workshop Director
Illinois Institute of Technology
Chicago, Illinois