ASTM F formally recognizes the use of in situ probes as a means of conducting relative humidity testing. In fact The Standard The In-Situ Method In-situ concrete moisture testing places sensors, or probes, inside the slab itself . This test method covers the quantitative determination of percent relative testing. The ASTM F standard represents a fundamental change in how. This standard is issued under the fixed designation F; the number immediately 1 This test method is under the jurisdiction of ASTM Committee F06 on.
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10 Guidelines for ASTM F2170 Preparation and Testing
Jason, I appreciate this means to contact you. Concrete slab moisture problems can cause floor covering delamination, peeling, blistering, staining and sweating. These requirements for the standard apply regardless of the RH test method being used.
Section 11 of ASTM F details the requirements of each report, including test hole location, dates and times of measurements, RH reading, temperature reading, and any other conditions that might impact the RH reading see section 11 for complete reporting requirements. That being said, I have heard a couple of different methods people are using.
In this way, in situ measurement provides a composite picture of overall slab moisture levels, and staandard the data necessary to make business decisions regarding flooring tsst. If not, call their technical team and ask the questions.
December 27, at 3: Preparation Confirm your test method equipment meets specifications. Use our checklist to record and report the RH readings.
First, as you probably know, the ASTM standard is silent on this specific topic. Thanks for the reply, Patrick. With all areas of ASTM-compliant RH testing, precision is key and data integrity must also be the focus for each flooring professional. The next five have to do with the proper installation and use of the RH test method. 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.
Know the required depth of the test holes. The MVER is defined as the rate of water vapor emissions from the surface of concrete and is determined with the use of a desiccant material sealed to the slab surface for a specified time period, then measured.
RH Testing and Reporting Drill and prepare the test holes. ASTM F formally recognizes the use of in situ probes as a means of conducting relative humidity testing. Relative humidity RH in a concrete slab can fluctuate with environmental changes.
Make sure your calibration is up to date. Many contractors use vapor barriers directly under the slab to slow moisture permeation. Meeting this standard provides the groundwork for limiting moisture-related flooring problems and the many liabilities and mitigation problems that can result from excess moisture. All sensors must be calibrated no less than 30 days prior to use. While any professional must understand the exact requirements of standard F the most recent versionthe following are 10 guidelines to help f21700 that you have met the criteria laid out in ASTM F Logically then, moisture levels at the bottom of a slab will read higher from those at the surface.
Check job site conditions. UPS peak season may cause delays.
The total area of the slab and the number of test holes must be recorded on your report. Does the finish roof product have specifications for testing the concrete deck? The depth is calculated to the bottom of the test hole the location of the installed RH sensor or probe.
Sub-grade standaard vapor can permeate even well-mixed and applied slabs. Without it, even a well-dried and tets foundation can end up with concrete slab moisture problems. We recommend placing the serial number decal which also helps track certification of each standarx on the corresponding test hole on the mapped report. We also will not be shipping on these days, but will resume shipping on Tuesday, January 2nd. As concrete dries, moisture migrates from the bottom of the slab to the surface where it can evaporate away.
I hope this helps.
gest Skip to content Concrete slab moisture is a major cause of concrete flooring failure. June 8, at 1: January 9, at The standard provides precise guidelines for RH testing methods. It has been believed that the change in the desiccant weight could be translated into a moisture ratio for the concrete beneath. I would verify that the hole depths are consistent and that environmental conditions are at service conditions.
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 mwthod and the consumer.
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The In-Situ Method In-situ probes deepen concrete moisture measurement. Contact My Account 0 items We have people who sfandard the Rapid RH on shallow pours. For flooring and concrete professionals, ASTM F provides the standard for using relative humidity RH testing when measuring moisture content in concrete slabs. This site uses Akismet to reduce spam.