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Was on a job yesterday....
02-12-2011, 12:30 PM
Post: #1
Was on a job yesterday....
I was called in to prep a floor in a hospital that had experienced a failure. I was NOT doing testing, all I was asked to do was to bead blast the floor.

Of course I'm concerned (read - nosey Big Grin ) and inquired about the moisture readings and the floor prep beyond my involvement.

Initial moisture readings (Wagner Rapid RH were specified) were above the limit for the floor adhesive and material. This means they would also exceed the patch manufacturer's requirements. I offered a mitigation system to keep the project flowing.

Two days later new moisture tests came in. They had fallen dramatically and were well within requirements. :o

Okay, fine, I guess my limited involvement means I should keep my nose out of this. Sad After the old floor was removed and I came in to bead blast I pulled the probe sleeves out to see whose they were..... Well they obviously weren't Wagner. The readings were taken using a Protimeter. My heart just sunk. I have had so many problems with Protimeters I just get sick.

This is my opinion, and I don't work for Wagner, Howard Kanare is not my cousin, I have no monetary ties with Rapid RH in any way.... But if you are using the GE Protimeter and notice fluctuating readings and lower readings than the Rapid RH gives you, please think about why this is.

The Protimeter has perforated slots up the side of the sleeve. You can't measure the humidity at a 40% depth when the sleeve is open all the way from 10% depth to 40% depth. What you end up reading is the average of the entire range of concrete exposed. Add the fact that the probes must be allowed to acclimate in each hole for an hour, and in this instance there were three holes, meaning these probes would take a minimum of three hours to read (impossible when you are only allowed to run in between surgeries) and you can see why the Protimeter was the wrong probe to use... And remember the Protimeter must be checked for calibration per the ASTM.

Okay, in the end I am worried that the floor actually is too wet, there will be a failure and now my company is involved.....

JD Grafton
Concrete Answers for Flooring Problems
[email protected]
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Messages In This Thread
Was on a job yesterday.... - CC Solutions - 02-12-2011 12:30 PM
RE: Was on a job yesterday.... - eaadams - 02-12-2011, 03:02 PM
RE: Was on a job yesterday.... - eaadams - 02-12-2011, 09:02 PM
RE: Was on a job yesterday.... - Ernesto - 02-13-2011, 08:44 AM
RE: Was on a job yesterday.... - Ernesto - 02-13-2011, 04:47 PM
RE: Was on a job yesterday.... - eaadams - 02-13-2011, 09:53 PM
RE: Was on a job yesterday.... - Ernesto - 02-14-2011, 06:59 AM
RE: Was on a job yesterday.... - Ernesto - 02-14-2011, 08:27 PM
RE: Was on a job yesterday.... - eaadams - 02-14-2011, 11:26 PM
RE: Was on a job yesterday.... - Ernesto - 02-15-2011, 07:52 AM
RE: Was on a job yesterday.... - EWagner - 10-03-2011, 08:59 AM