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Concrete Hood Method
04-29-2009, 11:27 PM (This post was last modified: 04-29-2009 11:30 PM by Trever Shiplee.)
Post: #3
RE: Concrete Hood Method
I agree with you Ray the hood method ASTM F2420 is a similar measurement to the calcium chloride method yet the hood method is measuring the amount of free water in the slab while the calcium chloride test is measuring moisture vapor both of these test reflect a 1/4" to 1/2" of the slabs thickness, ASTM F2170 measures at 40% of the slab depth. Our testing lab has performed all three of these test and have not found a true correlation between the hood method ASTM F2420 and the in situ probe method ASTM F2170 we have found though at ideal conditions the hood method has been five to eight percent lower than the in situ probe. In closing when doing an investigation in flooring failure we chose ASTM F2170 due to the depth the test measures and to the lower chance of tester’s error during placement.

Respectfully
Trever Shiplee
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Messages In This Thread
Concrete Hood Method - Blake McFee - 03-25-2009, 09:18 AM
RE: Concrete Hood Method - rthompson - 04-24-2009, 09:49 AM
RE: Concrete Hood Method - Trever Shiplee - 04-29-2009 11:27 PM
RE: Concrete Hood Method - WeldKaye - 10-21-2009, 09:41 PM
RE: Concrete Hood Method - Blake McFee - 10-23-2009, 10:02 AM
RE: Concrete Hood Method - CC Solutions - 12-16-2009, 11:39 AM
RE: Concrete Hood Method - CC Solutions - 12-17-2009, 09:33 AM
RE: Concrete Hood Method - eaadams - 11-08-2013, 01:41 PM