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D2726_19_10

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Only specimens that are known to be thoroughly dry, that is, laboratory-prepared dried specimens, are to be tested in accordance with 10.2 of the written standard. All others are assumed to contain moisture or solvent, and are to be tested in accordance with 10.1 of the written standard. The sequence of testing for 10.1 of the written standard is... in water. Saturated surface dry... dry. Laboratory-prepared dried specimens, include dry-plant produced laboratory-compacted samples. Mass of specimen in water. Completely submerge the specimen in the water bath at 25±1 degree Celsius, 77±1.8 degrees Fahrenheit, for 3 to 5 minutes. Then determine the mass by weighing in water. Designate this mass as "C." If the temperature of the specimen differs from the temperature of the water bath by more than 2 degrees Celsius, 3.6 degrees Fahrenheit, the specimen shall be immersed in the water bath for 10 to 15 minutes, instead of 3 to 5 minutes. Mass of saturated surface-dry specimen in air, within 15 seconds of removing the sample from the water bath. Surface-dry the specimen by blotting quickly with a damp cloth towel. And, then, determine the mass by weighing in air. Designate this mass as, "B," Mass of Dry Specimens. For cores and other specimens that are not used for further resting and evaluations, after determining the mass in water, and in a saturated surface-dry condition, thoroughly dry the specimen to a constant mass at 110±5 degrees Celsius, 230±9 degrees Fahrenheit. Allow the specimen to cool and weigh in air. Designate this mass as, "A." Other methods, such as, Practice D7227 and D7227M, may be used to dry the specimen, as long as a constant mass is achieved, mass repeats within 0.1%. Drying the specimen at the required temperature of 110 degrees Celsius, 230 degrees Fahrenheit, will change the characteristics and shape of the specimen. This will make the specimen unsuitable for further testing. Drying the specimen at a reduced temperature, such as 52 degrees Celsius, 125 degrees Fahrenheit, in order to keep it intact, will not meet the requirements of this test method. For specimens used to conduct performance or additional tests and in the absence of drying procedure provided by the specified test method, use the practice D7227 and D7227M method to dry the specimen. Mass of dry specimen in air. Determine the mass by weighing the specimen after it has been standing in air, at room temperature for at least one hour. Designate this mass as, "A." Use the same procedure as described in 10.1.1 of the written standard. Surface dry the specimen by blotting quickly with a damp cloth towel. And, then, determine the mass by weighing in air. Designate this mass as, "B."

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Duration: 3 minutes and 50 seconds
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Language: English
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Posted by: abuckmaster on Aug 7, 2019

D2726_19_10

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