#Login Register
measurement in a cold slab
  • 0 Vote(s) - 0 Average


01-18-2013, 05:02 PM #15
eaadams Concrete Moisture Expert *****
Status: Offline Posts:592 Threads:85 Joined:Jul 2010
Have an odd slab where it is 2" ontop of a bitumin tar like hot mop over a 5-6" structural slab from the 1930's.

tester placed the wagner probes in the 1-1/2" so to not puncture the membrane / tar thing.

Results between 69% - 90% over 13 tests.

Here is my worry: slab temp > ambient temp. Somehow (and I've never seen this) the slab temp in the 50's and the air temp was 49. Ambient RH 57%.

I said I'd like to see readings taken when there is some drive with hotter air in the space (it has been cold in CA this winter). He more or less said hot air won't give good readings since this is the 'ideal' time for such testing with high humidity. I wouldn't call 57% ambient humidity high but...

Do you agree that these cold air temps encourage accurate RH readings in the Concrete?








Messages In This Thread
measurement in a cold slab - Noweare - 12-04-2012, 02:45 PM
RE: measurement in a cold slab - CCR - 12-05-2012, 05:47 AM
RE: measurement in a cold slab - CC Solutions - 12-05-2012, 07:37 AM
RE: measurement in a cold slab - Noweare - 12-05-2012, 10:59 AM
RE: measurement in a cold slab - CC Solutions - 12-05-2012, 12:55 PM
RE: measurement in a cold slab - eaadams - 12-19-2012, 01:22 PM
RE: measurement in a cold slab - CCR - 12-19-2012, 02:12 PM
RE: measurement in a cold slab - Ernesto - 12-19-2012, 03:18 PM
RE: measurement in a cold slab - eaadams - 12-19-2012, 03:19 PM
RE: measurement in a cold slab - Ernesto - 12-20-2012, 03:37 PM
RE: measurement in a cold slab - eaadams - 12-20-2012, 04:23 PM
RE: measurement in a cold slab - Ernesto - 12-20-2012, 06:23 PM
RE: measurement in a cold slab - CC Solutions - 12-20-2012, 07:55 PM
RE: measurement in a cold slab - eaadams - 12-21-2012, 04:29 PM
RE: measurement in a cold slab - eaadams - 01-18-2013, 05:02 PM
RE: measurement in a cold slab - eaadams - 11-05-2013, 12:08 PM
RE: measurement in a cold slab - Ernesto - 04-15-2014, 02:30 PM

Possibly Related Threads...
Thread / Author Replies / Views Last Post
4 Replies 4,585 Views
Last Post by Ernesto
05-05-2014, 04:17 PM
1 Replies 5,313 Views
Last Post by Rubensgt40
01-24-2013, 07:03 PM
23 Replies 57,840 Views
Last Post by foxgeorge
12-15-2011, 01:20 AM
2 Replies 11,316 Views
Last Post by CC Solutions
09-20-2010, 02:25 PM
5 Replies 14,023 Views
Last Post by Ernesto
07-12-2010, 07:00 PM
2 Replies 10,035 Views
Last Post by RCConcrete Consulting
09-21-2009, 05:17 PM
1 Replies 10,166 Views
Last Post by EWagner
07-09-2009, 01:46 PM
1 Replies 8,791 Views
Last Post by rthompson
09-26-2008, 02:03 PM

Users browsing this thread:
1 Guest(s)