Formerly under the jurisdiction of Committee C17 on Fiber-Reinforced Cement Products, this test method was withdrawn in May 2021. This standard is being withdrawn without replacement due to its limited use by industry.

5.1 The value of compression (as described in 9.5) is proportional to the bulk under moderate pressure.

5.2 The value of percent recovery is a measure of springiness or bulk fiber resilience.

1.1 This test method covers the determination of the bulking factor of spinning grade fiber. These include grade 4A and longer.2

1.2 Results obtained on other grades may be considered as an evaluation of their bulk fiber resilience.

1.3 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 non-conformance with the standard.

1.4 Warning—Breathing of asbestos dust is hazardous. Asbestos and asbestos products present demonstrated health risks for users and for those with whom they come into contact. In addition to other precautions, when working with asbestos-cement products, minimize the dust that results. For information on the safe use of chrysoltile asbestos, refer to “Safe Use of Chrysotile Asbestos: A Manual on Preventive and Control Measures.”3

1.5 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 appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. For specific hazard warning, see 1.4.