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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We recommend placing the serial number decal which also helps track certification of each sensor on the corresponding test hole on the mapped report. Does the finish roof product have specifications for testing the concrete deck? Each hole must have a liner that isolates the sensor from ambient conditions, and sensors must have NIST-traceable calibration.

When To Test Concrete To ASTM F2170?

Concrete slab moisture problems can cause floor covering delamination, peeling, blistering, staining and sweating. 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.

This moisture map helps the user determine where it is best to locate the sensors for F When concrete is mixed and poured, water vapor migrates from the bottom of the slab to the surface to evaporate. As concrete dries, moisture migrates from the bottom of the slab to the surface where it can evaporate away. Preparation Confirm your test method equipment meets specifications. I would verify that the hole depths are consistent and that environmental conditions are at service conditions.


Leave a Reply Cancel reply Your email address will not be published. The test hole depth is not a fixed depth, but it must be calculated based on slab thickness and number of drying sides: 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. First, I have to state that F is specified for interior applications that are under consistent ambient air controls.

Astn RH test results can now be obtained after just 24 hours. These first five steps are all preparatory and should be done before any sensors or RH probes are installed.

10 Guidelines for ASTM F2170 Preparation and 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. You consent to our cookies if you continue to use our website.

Added 08 Oct Author: Until now, the ASTM F standard has required a asmt waiting period between drilling the test holes where the RH probes are placed and taking official RH measurements. This site uses Akismet to reduce spam. Learn how your comment data is processed.

In that case, builders did not allow the slab sufficient time for concrete moisture levels to equilibrate reach equilibrium moisture content according to relative g2170 RH. 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.

At this point, if one test fails, they all fail. This website uses cookies. In practice, readings are often taken before the 72 hours has passed, so contractors have an idea of how things are trending. The science validating the RH test as the more accurate and reliable test for concrete moisture continues to pile up.


When To Test Concrete To ASTM F?

Leave a Reply Cancel reply Your email address will not be published. No other concrete moisture test is as fast or as accurate as the in situ RH test. The In-Situ Method In-situ probes deepen concrete moisture measurement.

June 8, at 1: In-situ concrete moisture testing places sensors, or probes, inside the slab itself. 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 ast consumer. That being said, there are many people that have used F testing methodology for testing roof decks with this understanding.

ASTM F Explained – ASTM F Information

Other methods typically involve taking measurements only at the surface of the slab. A moisture map of the entire floor can be built up, showing how wet the slab is and where the wettest locations are.

Your email address will not be published. Thanks for the question. 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.