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+--- Forum: Moisture Measurement in Concrete (/forumdisplay.php?fid=2)
+--- Thread: RH Testing Lighweight Concrete (/showthread.php?tid=34)
RH Testing Lighweight Concrete - JDJR - 09-21-2009 05:59 AM
What are the procedures for testing Lightweight Concrete, and can you get a true reading.
RE: RH Testing Lighweight Concrete - Ben - 09-22-2009 03:42 PM
ASTM F2170. I don't see why you wouldn't get a true reading when following that method.
RE: RH Testing Lighweight Concrete - Ernesto - 09-24-2009 04:10 PM
What is the thickness of lightweight concrete? Anyone know?
RE: RH Testing Lighweight Concrete - JDJR - 09-28-2009 05:24 AM
The thickness is 6"
RE: RH Testing Lighweight Concrete - CC Solutions - 12-16-2009 12:05 PM
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.