ASTM D146-04(R2020) pdf free download
ASTM D146-04(R2020) pdf free download.Standard Test Methods for Sampling and Testing Bitumen-Saturated Felts and Woven Fabrics for Roofing and Waterproofing
1. Scope
1.1 These test methods cover the sampling and examination of felts or woven fabrics, saturated or impregnated but not coated with asphaltic or coal-tar materials, for use in water- proofing or for the construction of built-up roof coverings. 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 may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the standard. 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. Sampling
3.1 From each shipment of the specified saturated felt or fabric, select at random a number of rolls equal to one half the cube root of the total number of rolls in the lot. If the specification requires sampling during manufacture, consider the lot to be the planned production quantity and select the rolls at uniformly spaced time intervals throughout the production period. The minimum sample shall consist of five rolls. If the calculated number is fractional, express it as the next highest whole number. For convenience, the following table, showing the number of rolls to be selected from lots of various sizes, is given:
14. Pliability
14.1 Felts—From the representative specimen, cut ten 25 by 200-mm [1 by 8-in.] test pieces, five in the direction ofand five across the fiber grain, as shown at F-1 to F-5, and at G-1 to G-5 in Fig. 1, respectively. Immerse them in water at 25 6 1 °C [77 6 1.8 °F] for 10 to 15 min; then remove each specimen separately and immediately bend it 90° over the rounded edge of a block at a uniform speed in approximately 2 s. The block shall be 75 mm [3 in.] square by 50 mm [2 in.] thick, with one long edge rounded on a radius of 12.7 mm [0.50 in.] and another edge on the same 75-mm [3-in.] face rounded on a radius of 19 mm [0.75 in.]. In bending, hold the specimen tightly against the upper 50-mm [2-in.] face of the block and bend its projecting end over the specified rounded edge, without exerting any stress other than that required to keep the specimen in contact with the block and to avoid kinking. Consider any surface rupture visible to the normal eye and exceeding 3 mm [ 1 ⁄ 8 in.] in length as a failure. 14.2 Fabrics—Cut five 25 by 200-mm [1 by 8-in.] test pieces from the representative specimen in the direction of the warp, as shown at G-1 to G-5 in Fig. 1. Immerse them in a cooling mixture of ice and water at 0 °C [32 °F] for 10 to 15 min; then remove each specimen separately and immedi-ately bend it over a 1.60-mm [ 1 ⁄ 16 -in.] diameter mandrel through an arc of 180° at a uniform speed in approximately 2 s and then through 360° over the same mandrel in the opposite direction. Dry the specimens thoroughly and examine them. If one or more of the test specimens crack, cut ten specimens from another portion of the sample and repeat the test. If one or more of these specimens crack, consider the material as failing.
