ASTM F formally recognizes the use of in situ probes as a means of conducting relative humidity testing. In fact The Standard The In-Situ Method In-situ concrete moisture testing places sensors, or probes, inside the slab itself . This test method covers the quantitative determination of percent relative testing. The ASTM F standard represents a fundamental change in how. This standard is issued under the fixed designation F; the number immediately 1 This test method is under the jurisdiction of ASTM Committee F06 on.
|Published (Last):||24 November 2004|
|PDF File Size:||8.41 Mb|
|ePub File Size:||5.65 Mb|
|Price:||Free* [*Free Regsitration Required]|
ASTM F Explained – ASTM F Information
RH Testing and Reporting Drill and prepare the test holes. If i have an area of approx sq ft and have done the required testing for the area, f21700 5 fail and 3 pass does the whole area fail? Map your sensor count and location. Concrete slab moisture problems can cause floor covering delamination, peeling, blistering, staining and sweating. December 27, at 3: Surface-based test results will fluctuate, even more, under these changes in environmental conditions.
April 3, f270 Sub-grade water vapor can permeate even well-mixed and applied slabs. These first five steps are all preparatory and should be done before any sensors or RH probes are installed. Is this acceptable or compromise the test?
And installers are finding results are more accurate and more dependable with RH testing. Some calibration restrictions may apply, so read the standard carefully to be emthod your test equipment qualifies for the most recent standard. The first thing I would look at is the assembly that you are installing.
October 31, at October 27, at Aztm do you handle this problem? Contact My Account 0 items You consent to our cookies if you continue to use our website.
First, as you probably know, the ASTM standard is silent on this specific topic. Can you please let me know your recommendation on this? General contractors must bear in mind two interactive processes when they are looking at construction schedules: Many contractors use vapor barriers directly under the slab to slow moisture permeation.
As any professional knows, ASTM standars are established to help guide industry testing and also to help ensure standardized best practices to protect both the installer and the consumer. Meeting this standard provides the groundwork for limiting moisture-related flooring problems and the many liabilities and mitigation problems that can result from excess moisture. Note that the liner requirements have been updated and the hole is to be fully lined to meet the ASTM standard.
First, I have to state that F is specified for interior applications that are under consistent ambient air controls. And moisture can still be an issue at grade so concrete foundations must be designed to include proper moisture drainage. Learn how your comment data is processed.
10 Guidelines for ASTM F2170 Preparation and Testing
Each hole must have a liner that isolates the sensor from ambient conditions, and sensors must have NIST-traceable calibration. April 7, at 3: In that case, builders did not allow the slab sufficient time for concrete moisture levels to equilibrate reach equilibrium moisture content according to relative humidity RH.
Use our checklist to record and report the RH readings. The standard provides precise guidelines for RH testing methods. That being said, I have heard a couple of different methods people are using. This site uses Akismet to reduce spam. After the initial reading, readings can be updated at any time desired with two conditions in mind: The depth is calculated r2170 the bottom of the test stajdard the location of the installed RH sensor or probe.
Without it, even a well-dried and functioning foundation can end up with concrete slab moisture problems. UPS peak season may cause delays. Check job site conditions.
If you forward to 1: Logically then, moisture levels at the bottom of a slab will read higher from those at the surface. In-situ probes deepen concrete moisture measurement.