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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Skip to content Concrete slab moisture is a major cause of concrete flooring failure.

Have you heard about the change in ASTM F2170 from 72hrs to 24hrs?

I would verify that the hole depths are consistent and that environmental conditions are at service conditions. Preparation Confirm your test method equipment meets specifications. The total area of the slab and the number of test holes must be recorded on your report. Make sure your calibration is up to date.

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

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Have you heard about the change in ASTM F from 72hrs to 24hrs?

At this point, if one test fails, they all fail. April 3, at 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. 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.

10 Guidelines for ASTM F Compliance

While any professional must understand the exact requirements of standard F the most recent aetmthe following are 10 guidelines to help ensure that you have met the criteria laid out in ASTM F Added 08 Oct Author: Essentially, the instructions guide us to: Map your sensor count and location. We use cookies for shopping cart functionality, to personalize content and ads, to provide social media features and to analyze our traffic.

The depth is calculated to the bottom of the test hole the location of f21770 installed RH sensor or probe.

Events News Technical Articles. Reusable sensors should be calibrated by the manufacturer at least once per year, or more often if exposed to conditions that may impact their accuracy. And moisture can still be an issue at grade so concrete foundations must be designed to include proper moisture drainage. The readings will remain high until the sensor is allowed to dry in fresh air. 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.

Logically then, moisture levels at the bottom of a slab will read higher from those at the surface.

By testing non-destructively per ASTM F, the inspector can get an instant and precise evaluation of the moisture conditions within 1. There is a potential for condensation to appear on the sensor during the test period, due to the high relative humidity within the concrete ast the concrete has sufficiently dried.


Concrete slab moisture is a major cause of concrete flooring failure.

This process requires time and quantifiable concrete moisture sstm to verify. Can you please let me know your recommendation on this? Repairs Calibration Register Your Product. It is essential that anyone doing the F test follows the standard and allows for that 24 hours to pass before inserting the probe and making final relative humidity measurements.

If not, call their technical team and ask the questions. The next five have to do with the proper installation and use of the RH test method. October 27, at RH Testing and Reporting Drill and prepare the test holes.

10 Guidelines for ASTM F2170 Preparation and Testing

December 27, at 3: As concrete dries, moisture migrates from the bottom of the slab to the surface where it can evaporate away. After the initial reading, readings can be updated at any time desired with two conditions in mind: The In-Situ Method In-situ probes deepen concrete moisture measurement. When concrete is mixed and poured, water vapor migrates from the bottom of the slab to the surface to evaporate. In-situ concrete moisture testing places sensors, or probes, inside the slab itself.