Standard Test Method for Determining Relative Humidity in Concrete Floor Using in situ Probes. Apparatus – Humidity Probe and Digital Meter Accuracy ± %. ASTM F ASTM F RH (Relative Humidity). Testing Protocol: ASTM Abstract: Significance and Use. Moisture permeating from concrete floor slabs. 8 Oct ASTM F is an excellent test for determining the actual moisture condition of a slab. As a result, this type of test is recommended by many.

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In that case, builders did not allow the slab sufficient time for concrete moisture levels v2170 equilibrate reach equilibrium moisture content according to relative humidity RH. Be sure to familiarize yourself with ASTM F and choose the best concrete moisture test method for the job.

Logically then, moisture levels at the bottom of a slab will read higher from those at the surface. And moisture can still be an issue at grade so concrete foundations must be designed to include proper moisture drainage. The basics remain the same, and for good reason.

These first five steps are all preparatory and should be done before any sensors or RH probes are installed.

When To Test Concrete To ASTM F2170?

Hedenblad states that the waiting time is to overcome the effects of drilling the concrete has on the conditions within the hole created for the test. That being said, I have heard a couple of different methods people are using.


Finally, for best results, the combination of ASTM F non-destructive moisture content testing and F in-situ relative humidity testing allows for a more complete picture of the moisture conditions of the slab. Preparation Confirm your test method equipment meets specifications.

As said, there is good reason why this exact standard methodology is used. This will NOT be valid for ASTM compliance, but can certainly provide a target timeline for schedule decisions or for choosing alternate adhesive or flooring options that might have higher moisture tolerances. September 2, at 9: October 27, at Does the finish roof product have specifications for testing the concrete deck?

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View the article in the digital issue of ProInstaller. In-situ concrete moisture testing places sensors, or probes, inside the slab itself. It has been believed that r2170 change in the desiccant weight could be translated into a moisture ratio for the concrete beneath. You consent to our cookies if you continue to use our website. So, do you know really know your F?

ASTM F Explained – ASTM F Information

Is this acceptable or compromise the test? Each hole must have a liner that isolates the sensor from ambient conditions, and sensors must have NIST-traceable g2170. Once you find out the methodology they require to meet warranty, I would reach out to someone within RCI atm your area to conduct the tests.


The standard provides precise guidelines for RH testing methods. Sub-grade water vapor can permeate even well-mixed and applied slabs. Thanks for the question.

While any professional must understand the exact requirements of standard F the most recent versionthe following are 10 guidelines to help ensure that you have met the criteria laid out in ASTM F The depth is calculated to the bottom of the test hole the location of the installed RH sensor or probe. By testing non-destructively per ASTM F, the inspector can get an instant and precise evaluation of the moisture conditions within 1.

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Check job site conditions. General contractors must bear in mind two interactive processes when they are looking at construction schedules: This is a welcome development as accurate results can be attained in a shorter time. For flooring and concrete professionals, ASTM F f21170 the standard for using relative humidity RH testing when measuring moisture content in concrete slabs.

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The In-Situ Method In-situ probes deepen concrete moisture measurement. This moisture map helps the user determine where it is best to locate the sensors for F We have people who use the Rapid RH on shallow pours.

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