Active Standard ASTM D6703 | Developed by Subcommittee: D04.47
Book of Standards Volume: 04.03
Historical (view previous versions of standard)
Significance and Use
This test method is intended primarily as a laboratory diagnostic tool for estimating the colloidal stability of asphalt, asphalt cross blends, aged asphalt, pyrolyzed asphalt, and heavy oil residuum. Historically, asphalt and heavy oil residua have been modeled as colloidal suspensions (8,9) in which a polar, associated asphaltene moiety (the dispersed phase) is suspended in a maltene solvent moiety (the dispersing medium) (refer to test methods D 3279
1.1 This test method describes a procedure for quantifying three Heithaus compatibility parameters (1,2) that estimate the colloidal stability of asphalts and asphalt cross blends (1,2), aged asphalts (3), and pyrolyzed heavy oil residua and asphalt (4) using automated Heithaus titrimetry as a stability diagnostic tool.
1.2 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 (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
D3279 Test Method for n-Heptane Insolubles
D4124 Test Method for Separation of Asphalt into Four Fractions
D5546 Test Method for Solubility of Asphalt Binders in Toluene by Centrifuge
E169 Practices for General Techniques of Ultraviolet-Visible Quantitative Analysis
ICS Number Code 17.060 (Measurement of volume, mass, density, viscosity)