February 3, 2021   |   by admin

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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If condensation occurs during the test period, then the sensor will continue to indicate that the slab is wetter than it actually is, even if the concrete has subsequently dried. 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.

Please login or create an account. For most RH testing systems, this includes cleaning any debris out of the test hole and inserting the necessary liner in the hole. This moisture map helps the user determine where it is best to locate the sensors for F September 6, at In practice, readings are often taken before the 72 hours has passed, so contractors have an idea of how things are trending. It has been believed that the change in the desiccant weight could be translated into a moisture ratio for the concrete beneath.

The only thing we recommend is that you ensure that there is a good seal between the sensor body and the concrete wall. The total area of the slab and the number of test holes must be recorded on your report.

Updated ASTM F2170 Reflects the Newest Science about RH Testing

For years now, the in situ relative humidity RH test for measuring the moisture condition of concrete has been shown to be the most reliable, accurate test available.

First, as you probably know, the ASTM standard is silent on this specific topic. The first thing I would look at is the assembly that you are installing. Know the required depth astk the test holes.


ASTM F Explained – ASTM F Information

Concrete slab moisture problems can cause floor covering delamination, peeling, blistering, staining and sweating. We also will not be shipping on these days, satm will resume shipping on Tuesday, January 2nd.

Make sure your calibration is up to date. I would verify that the hole asfm are consistent and that environmental conditions are at service conditions.

Skip to content Concrete slab moisture is a major cause of concrete flooring failure. Without it, even a well-dried and functioning foundation can end up with concrete slab moisture problems.

After the initial reading, readings can be updated at any time desired with two conditions in mind: Logically then, moisture levels at the bottom of a slab will read higher from those at the surface. The research confirmed two key discoveries: Sub-grade water vapor can permeate even well-mixed and applied slabs. If you forward to 1: Other methods typically involve taking measurements only at the surface of the slab.

And installers are finding results are more accurate and more dependable with RH testing. Does the finish roof product have specifications for testing the concrete deck? 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. For flooring and concrete professionals, ASTM F provides the standard for using relative humidity RH testing when measuring moisture content in concrete slabs.

In this way, in situ measurement provides a composite picture of overall slab moisture levels, and provides the data necessary to make business decisions regarding flooring installations. Your email address will not be published. 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.

Contact My Account 0 items Customer Service Contact Us Returns. No other concrete moisture test is as fast or as accurate as the in situ RH test.

Section 9 of the standard requires that both the slab and the ambient air above it must be at service conditions for a minimum of 48 hours before testing.


This website uses cookies. The science validating the RH test as the more accurate and reliable test for concrete moisture continues to pile up.

10 Guidelines for ASTM F Compliance

This website uses cookies. 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. Each test hole must adtm drilled to the depth determined at Step 5 above section 10 of ASTM F and properly prepared.

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. ASTM F formally recognizes the use of in situ probes as a means of conducting relative humidity testing. 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.

UPS peak season may cause delays. These requirements for the astj apply regardless of the RH test method being used.

Asm instead of putting things on hold for three full days while waiting for test results, contractors and flooring installers can take f2107 in a day and be in full compliance with the F standard.

Repairs Calibration Register Your Product. June 9, at 1: Relative humidity RH in a concrete slab can fluctuate with environmental changes. October 31, at Leave a Reply Cancel reply Your email address will not be published. As a result, this type of test is recommended by many international standards including ASTM, British Standards, and most Scandinavian standards, as well as being specified by floor aztm, coating and adhesive manufacturers worldwide.

Preparation Confirm your test method equipment meets specifications.