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F1869's Grandfather
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08-06-2013, 11:08 AM #1
CCR Concrete Moisture Coach ***
Status: Offline Posts:236 Threads:14 Joined:Dec 2011
Here's a moisture test perhaps some of you have heard of. Found this one in a current carpet spec. Interesting...perhaps the grandfather of ASTM F1869??

1. Drive a concrete nail 1/2" into the floor. Then remove the nail
2. Place a small amount of anhydrous calcium chloride or calcium sulfate crystals over the hole.
3. Cover the crystals and the hole with a piece of flat glass and seal the edges with waterproof tape or putty. Since concrete pourings vary, repeat the test every 1500 sf.
4. Leave in place 72 hours. Any color change in the crystals indicates the presence of moisture. Do not apply carpet until the slab is free of moisture and meets the approval of the carpet adhesive manufacturer.

Still can't believe I read this in a 2013 Div. 9 specificationHuh

JK Nixon
Concrete Restoration Services, LLC
Pittsburgh, PA
http://www.rhtester.com

08-06-2013, 08:32 PM #2
Ernesto Concrete Moisture Expert *****
Status: Offline Posts:606 Threads:33 Joined:Sep 2009
Never heard of that one. Must be a variation of the one where you drill holes and place calcium chloride crystals in a dish under a dome.

Maybe he has something there you never know. Why? Because the moisture hides down below!

What about the actual water in the concrete the rh meter will not pick up? Oh sorry I'm not supposed to say that here.

Stephen Perrera dba
Top Floor Installation Co.
http://www.tucsonazflooring.com
http://www.floorsavior.com

08-28-2013, 09:25 AM #3
CCR Concrete Moisture Coach ***
Status: Offline Posts:236 Threads:14 Joined:Dec 2011
Hope you get my reply.

Thanks

JK Nixon
Concrete Restoration Services, LLC
Pittsburgh, PA
http://www.rhtester.com

08-29-2013, 10:41 AM #4
eaadams Concrete Moisture Expert *****
Status: Offline Posts:591 Threads:85 Joined:Jul 2010
Please PM me the spec. I want to know who is spec'ing such crazy

09-01-2013, 07:42 AM #5
CC Solutions Concrete Moisture Evangelist *******
Status: Offline Posts:1,065 Threads:69 Joined:Dec 2009
Is this spec really that crazy?

As long as we all agree that whatever test is conducted, the results will be agreed upon and everyone will accept them as performance indicators, it works for me!!

JD Grafton
Concrete Answers for Flooring Problems
JGrafton@ccsolves.com

09-10-2013, 07:13 PM #6
Ernesto Concrete Moisture Expert *****
Status: Offline Posts:606 Threads:33 Joined:Sep 2009
Thats the problem, no one agrees on every testing procedure. This moisture testing of concrete is...has always been full of crazy hypotheses.

Hedenblad's study was based on new concrete. tHIS IS THE BASIS FOR ASTM F 2170-11. What about old concrete? Does it apply? No one ever speaks of old CC. Thats mostly where I'm at is with old concrete. A whole different animal.

Anyone who hires a moisture abatement guy to test his new slab is an idiot. Call me TAINTED. LOL

Stephen Perrera dba
Top Floor Installation Co.
http://www.tucsonazflooring.com
http://www.floorsavior.com








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