ASTM D1665 Test Method for Engler Specific Viscosity of Tar Products
1. Scope
1.1 This test method covers the determination of specific viscosity of tars and their fluid products. It does not determine absolute viscosity, but is an empirical flow test. Only by conforming strictly to requirements of the test method are reproducible results obtained.
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this 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 appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
2. Referenced Documents
2.1 ASTM Standards:
D140 Practice for Sampling Bituminous Materials
E1 Specification for ASTM Liquid-in-Glass Thermometers
E11 Specification for Woven Wire Test Sieve Cloth and Test Sieves
3. Terminology
3.1 Definitions:
3.1.1 Engler specific viscosity - the ratio obtained by dividing the time of flow, in s, of 50 mL of material using an Engler viscosimeter at a selected temperature by a factor representing the time of flow, in s, for an equal volume of water at 25°C. The usual temperatures for determination of specific viscosity of tar materials are 25°C, 40°C, 50°C, and 100°C, and generally the temperature is so selected that the specific viscosity is not more than 45.
