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WATER ABSORPTION - GB/T 24508-2009 & GB/T 17657-1999 (4.6)

1. TOOLS
1.1 Constant temperature water tank
1.2 Balance accurate to 0.01 g

2. SAMPLING
3*50x50 mm

3. ENVIRONMENTAL CONDITIONS
Condition the samples in a 20(+/-2)℃ and 65(+/-5)% relative humidity environment until they are stable

4. TESTING PROCEDURE
4.1 Weigh the samples accurate to 0.01 g (m1)

4.2 Immerse the samples into the tank with 7(+/-1) PH water at 20(+/-2) ℃. Make sure there is minimum 1 cm between the edge of any one sample and any other sample or the water tank bottom

4.3 Take the samples out of the water tank after 72(+/-0.5) hours and dry them with a cloth

4.4 Weigh the samples (m2) within 10 minutes of drying

4.5 Calculate the absorption W= (m2-m1)/m1x100

5. ASSESSING TEST RESULTS
Passing requirement: ≤3%



 
  
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