ASTM D6136-15(R2021) pdf free download

ASTM D6136-15(R2021) pdf free download.Standard Test Method for Kerosine Number of Unsaturated (Dry) Felt by Vacuum Method
1. Scope
1.1 This test method covers the determination ofthe relative saturating capacity of unsaturated (dry) felt papers used in roofing. 1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined. 1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appro- priate safety, health, and environmental practices and deter- mine the applicability ofregulatory limitations prior to use. 1.4 This international standard was developed in accor- dance with internationally recognized principles on standard- ization established in the Decision on Principles for the Development of International Standards, Guides and Recom- mendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
3. Summary of Test Method
3.1 The kerosine number of unsaturated (dry) felt is com- puted from the weight of a kerosine of known specific gravity retained by the felt after displacement of the air from interior voids. It is the millilitres of kerosine held /100 g of felt, and thus, is a measure of the quantity of saturant that a given felt will absorb.
4. Significance and Use
4.1 The ability to absorb kerosine is an indication of the ability to absorb hot asphalt. The kerosine number is used in calculating saturation efficiency.
5. Apparatus
5.1 Glass Vessel, approximately 1500 mL capacity, for soaking specimens of felt in kerosine, under vacuum. 5.2 Vacuum Pump, capable of reaching and maintaining a vacuum of at least 700 mm Hg in the glass vessel. 5.3 Lightweight Glass or Metal Weighing Container, with tightly fitting cover, 60 by 140 mm [2.5 by 5.5 in.] or larger, to contain felt strips in a horizontal position without bending or distortion. 5.4 Drying Oven, with dimensions at least 300 by 300 by 300 mm [12 by 12 by 12 in.]. 5.5 Other Apparatus—Desiccator, wire hook, and if necessary, a punch to make a small hole in a corner of the specimens after they are cut.
6. Materials
6.1 Water-White Kerosine, complying to the requirements of Specification D3699 and having a specific gravity of 0.800 6 0.025 at 25 °C, as determined in accordance with Test Method D1298.
8. Test Specimen
8.1 From each test unit of the sample cut two sets of six test specimen strips, each strip measuring 51 by 127 6 13 mm [2 by 5 6 1 ⁄ 2 in.] with the longer side parallel to the machine direction of the sheet.
9. Procedure
9.1 Place a set of strips in the tared weighing container and expose them, uncovered, for at least 1 but not more than 2 h in an oven, the interior ofwhich is maintained at a temperature of 105 6 3 °C. Keep the felt strips flat. Do not fold, roll, or distort them in any way. Handle the six strips as a unit in all of the following operations. 9.2 Remove the strips in the weighing container from the oven and place them, with the container still uncovered, in a desiccator to cool. 9.3 After cooling, rapidly close the container and weigh it with enclosed strips to the nearest 10 mg to obtain the net weight of the dry strips. 9.4 Insert a wire hook in one corner of the strips and immerse them at once in a vertical position in 1000 mL of kerosine at 25 6 1 °C in the glass vacuum vessel. Apply a vacuum of at least 700 mm Hg to the vessel containing the strips and hold it under these conditions for 15 min or for 5 min after the bubbles cease to come from the felt strips, whichever period is longer. Remove the felt strips from the kerosine and let them drain in the machine direction of the felt for 3 min 6 1 s, allowing the lower corner of each strip to touch the edge of the kerosine container. 9.5 Return the soaked strips to their weighing container, close the container, and determine the combined weight of the strips and the absorbed kerosine. (Warning—Care should be exercised in the use ofkerosine because it is flammable. Do not expose the material and its vapors to open flame or electrical spark.)