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RH Testing Lighweight Concrete
09-21-2009, 05:59 AM
Post: #1
RH Testing Lighweight Concrete
What are the procedures for testing Lightweight Concrete, and can you get a true reading.
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09-22-2009, 03:42 PM
Post: #2
RE: RH Testing Lighweight Concrete
ASTM F2170. I don't see why you wouldn't get a true reading when following that method.
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09-24-2009, 04:10 PM
Post: #3
RE: RH Testing Lighweight Concrete
What is the thickness of lightweight concrete? Anyone know? Smile
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09-28-2009, 05:24 AM
Post: #4
RE: RH Testing Lighweight Concrete
The thickness is 6"
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12-16-2009, 12:05 PM
Post: #5
RE: RH Testing Lighweight Concrete
Lightweight is scary! The aggregate is very porous and as such holds a great amount of water. Drying time for lightweight concrete can be 300% longer than standard concrete. I'd figure 3 months per inch of thickness and go from there.

I had a job that was on 11" of lightweight and I had MVER readings of 3lbs - 4lbs, with RH readings of 96%. The floor failed after the first year (that's when I was called in) and we ended up coating the floor with a Moisture Mitigation System.

JD Grafton
Concrete Answers for Flooring Problems
[email protected]
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