CID A-A-1979A
oil passes through the tube into the graduate. Calculate the volume of oil that did not pass through the tube in the three hour draining period as the volume of oil absorbed by the absorbent material. Divide the volume of oil absorbed by the weight of the sample in grams.
2.3 Absorption of distilled water. Tape an 18-mesh screen over one end of a glass tube measuring 23 cm in length and 3 cm in inside diameter. Weigh 50 g of the absorbent material into the open end of the glass tube held in a vertical position. Collect any fine particles passing through the screen and add to the tube. Clamp the tube at an angle of 30 degrees to the horizontal above a 100 ml graduate. Pour 75 ml of distilled water into the open end of the tube within a 15 second period. Allow the water to drain out of the tube for 30 minutes after the first drop of water passes through the tube into the graduate. Calculate the volume of water that did not pass through the tube in the 30 minute draining period as the volume of water absorbed by the absorbent material. Divide the volume of water absorbed by the weight of the sample of grams.
2.4 Solubility in distilled water. Dry a 5 g sample of the absorbent material in an oven at 102° C for 24 hours. Cool and weigh 2 g of the dried sample into a 250 ml beaker. Add 100 ml of distilled water at 25° C and stir for 3 minutes. Filter the solution through a tared Gooch crucible having a glass fiber filter of sufficient thickness and retention to retain all insoluble particles. Rinse all the residue from the beaker into the crucible with distilled water. Dry the crucible and residue for 24 hours in an oven at 102° C. Cool and weigh. Calculate the percent of the 2 g sample which dissolved in the distilled water.
2.5 Resistance to attrition. Place 100 g of absorbent material on nested No. 10 and No. 25 US Standard Sieves and shake on a sieve shaker for 5 minutes. Weigh 50 g of the absorbent material which passed through the No. 10 sieve but was retained on the No. 25 sieve. Place the 50 g of material in a bottom pan along with 30025.4 mm diameter steel balls and shake on the sieve shaker for exactly 20 minutes. After shaking for 20 minutes, pass the contents of the pan through a No. 10 sieve to remove the steel balls, Place the absorbent material which passed through the No. 10 sieve on to nested No. 25 and No. 80 sieves and shake on the sieve shaker for 5 minutes. Weigh the material passing through the No. 80 sieve and determine the percent of the original 50 g sample which passed through the No. 80 sieve.
NOTE: The contractor may use his normal quality assurance procedures for manufacture of this product; however, should a disagreement arise between the Government and its customer or between the Government and the manufacturer concerning compliance to the salient characteristics of this commercial item description, the test methods and tests stated in this commercial item description will be used to determine compliance of the product.
3. Product Conformance. The products provided shall meet the salient characteristics of this commercial item description, conform to the producer’s own drawings, specifications, standards, and quality assurance practices and be the same product offered for sale in the commercial market. The Government reserves the right to require proof of such conformance.
ASTM standards are available from the American Society for Testing and Materials, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959.
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