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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After these scientifically-validated specifications were firmly established, ASTM International published a usable standard. With the updated ASTM standard, contractors can now shave two days off any project schedule, just by ensuring the RH test is specified for the project, No other test method is as fast or as reliable.
ASTM F is an excellent test for determining the actual moisture condition of a slab. When concrete is mixed and poured, water vapor migrates from the bottom of the slab to the surface to evaporate.
With all areas of ASTM-compliant RH testing, precision is key and data integrity must also be the focus for each flooring professional. D2170 7, at 3: It has been believed that the change in the desiccant weight could be translated into a moisture ratio for the concrete beneath.
Until now, the ASTM F standard has required a hour waiting period between drilling the test holes where the RH probes are placed and taking official RH measurements.
And installers are finding results are more accurate and more dependable satm RH testing.
Updated ASTM F2170 Reflects the Newest Science about RH Testing
In-situ concrete moisture testing places sensors, or probes, inside the slab itself. We have people who use the Rapid RH on shallow pours. 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.
General contractors must bear in mind two interactive processes when they are looking at construction schedules: Thanks for the reply, Patrick. Customer Service Contact Us Returns.
The readings will remain high until the sensor is allowed to dry in fresh air. Please login or create an account. This site uses Akismet to reduce spam.
When To Test Concrete To ASTM F?
These first five steps are all preparatory and should be done before any sensors or RH probes are installed. I hope this helps. We also will not be shipping on these days, but will resume shipping on Tuesday, January 2nd. September 6, at Concrete slab moisture is a major cause of concrete flooring failure. 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? Note that the liner requirements have been updated and the hole is to be fully lined to meet the ASTM standard.
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 qstm. All sensors must be calibrated no less than 30 days prior to use. This site uses Akismet to reduce spam.
ASTM F Explained – ASTM F Information
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. The next five have to do with the ff2170 installation and use of the RH test method.
Some calibration restrictions may apply, so read the standard carefully to be sure your test equipment qualifies for the most recent standard. The science validating the RH test as the more accurate and reliable test for concrete moisture continues to pile up. RH Testing and Reporting Drill and prepare the test holes.
10 Guidelines for ASTM F2170 Preparation and Testing
Concrete slab moisture problems can cause floor covering delamination, peeling, blistering, staining and sweating. 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 covering, coating and adhesive manufacturers worldwide. Can you please let me know your recommendation on this?
Use our checklist to record and report the RH readings. Your email address will not be published. This process requires time and quantifiable concrete moisture measurements to ast. Other methods typically involve taking measurements only at the surface of the slab.
The new probes are designed to give a good indication of high relative humidity after an hour of testing. 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. June 9, at 1: At this stage, the probes can be removed and the sleeves capped until further testing is required before mitigation can be carried out.
As far back as the s, laboratories at the Portland Cement Association conducted controlled tests that verified the accuracy of RH testing.