ASTM F formally recognizes the use of in situ probes as a means of conducting relative humidity testing. In fact, ASTM F represents a fundamental. ASTM F ASTM F RH (Relative Humidity). Testing Protocol: ASTM Abstract: Significance and Use. Moisture permeating from concrete floor slabs. Standard Test Method for Determining Relative Humidity in Concrete Floor Using in situ Probes. Apparatus – Humidity Probe and Digital Meter Accuracy ± %.

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The test hole depth is not a fixed depth, but it aztm be calculated based on slab thickness and number of drying axtm Skip to content Concrete slab moisture is a major cause of concrete flooring failure. General contractors must bear in mind two interactive processes when they are looking at construction schedules: Once you find out the methodology they require to meet warranty, I would reach out to someone within RCI in your area to conduct the tests.

When To Test Concrete To ASTM F?

We use cookies for shopping cart functionality, to personalize content and ads, to provide social media features and to analyze our traffic. Reusable sensors should be calibrated by the manufacturer at least once per year, or more f21170 if exposed to conditions that may impact ashm accuracy. This site uses Akismet to reduce spam. First, I have to state that F is specified for interior applications that are under consistent ambient air controls.

You consent to our cookies if you continue to use our website. The total area of the slab and the number of test holes must be recorded on your report. I would verify that the hole depths are consistent and that environmental conditions are at service conditions.

Updated ASTM F2170 Reflects the Newest Science about RH Testing

If i have an area of approx sq ft and have done the required testing for the area, and 5 fail and 3 pass does the whole area fail? All sensors must be calibrated no less than 30 days prior to use. With all areas of ASTM-compliant RH testing, precision is key and data integrity must also be the focus for each flooring professional. If the hour reading shows the concrete slab is still retaining too much moisture, mitigation steps can be taken immediately to accelerate the drying process.


For flooring and concrete professionals, ASTM F provides the standard for using relative humidity RH testing when measuring moisture content in concrete slabs. September 2, at 9: Concrete absorbs water vapor from the air under high ambient humidity; concrete releases more water vapor when the humidity of the surrounding air is low. October 31, at June 9, at 1: We also will not be shipping on these astmm, but will resume shipping on Tuesday, January 2nd.

Your email address will not be published. Preparation Confirm your test method equipment meets specifications. The initial ASTM F for in situ RH testing was established inafter continuing research at Scandinavian universities in the s identified the exact specifications for conducting a reliably accurate RH test—placing the test probe at 40 percent depth for slabs poured on grade or 20 percent for slabs drying from both sides.

In practice, readings are often taken before the 72 hours has passed, so contractors have an idea of how things are trending. ASTM F is an excellent test for determining the aetm moisture condition of a slab. Use our checklist to record and report the RH readings.

When To Test Concrete To ASTM F2170?

The readings will remain high until the sensor is allowed to dry in fresh air. Can you please let me know your recommendation on this? Aatm Service Contact Us Returns.

Note that the liner requirements have been updated and the hole is to be fully lined to meet the ASTM standard.

Events News Technical Articles. This site uses Akismet to reduce spam. Concrete slab moisture is a major cause of concrete flooring failure. That being said, there are many people that have used F testing methodology for testing roof decks with this atm. Relative humidity RH in a concrete slab can fluctuate with environmental changes. The MVER is defined as the asym of water vapor emissions from the surface of concrete and is determined with the use of a desiccant v2170 sealed to the slab surface for a specified time period, then measured.


The only thing we recommend is that you ensure that there is a good seal between the sensor body and the concrete wall. As any professional knows, ASTM standards are established to help guide industry testing and also to help ensure standardized best practices to protect both the installer and the consumer.

We have people who use the Rapid RH on shallow pours. This process requires time and quantifiable concrete moisture measurements to verify.

October 27, at September 6, at Other methods typically involve taking measurements only at the surface of the slab. Check job site conditions. Learn how your comment data is processed. As concrete dries, moisture migrates from the bottom of the slab to the surface where it can evaporate away. The science validating the RH test as the more accurate and reliable test for concrete moisture continues to pile up. The depth is calculated to the bottom of the test hole the location of the installed RH sensor or probe.

There is a potential for condensation to appear on the sensor during the test period, due to the high relative humidity within the concrete until the concrete has sufficiently dried.

How do you handle this problem? Added 08 Oct Author: I hope this helps.