ASTM D4893 Standard Test Method for Determination of Pitch Volatility
1. Scope
1.1 This test method covers the determination of the percent of pitch volatility.
1.2 Since this test method is empirical, strict adherence of the procedure is necessary.
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 appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
2. Summary of Test Method
2.1 An aluminum weighing dish with about 15 g of specimen is introduced into the cavity of a metal block heated and maintained at 350°C (662°F). After 30 min +/- 10 s during which the volatiles are swept away from the surface of the liquid pitch by preheated nitrogen, the sample is taken out and allowed to cool down in the desiccator. The pitch volatility is determined by the sample weight loss and reported as percent weight loss.
3. SigniFIcance and Use
3.1 This test is useful in evaluating and characterizing pitch physical properties in comparing the consistency of shipments and sources of supply.
