ASTM D7906-14
Standard Practice for Recovery of Asphalt from Solution Using Toluene and the Rotary Evaporator

Standard No.

ASTM D7906-14

Release Date

2014

Published By

American Society for Testing and Materials (ASTM)

Status

Be replaced

Replace By

ASTM D7906-22

Latest

ASTM D7906-22

Scope

4.1 To determine the characteristics of the asphalt in an asphalt paving mixture, it is necessary to extract the asphalt from the aggregate by means of a suitable solvent and then to recover the asphalt from the solvent without significantly changing the asphalt’s properties. The asphalt recovered from the solvent by this practice can be tested using the same methods as for the original asphalt cement, and comparisons between the properties of the original and recovered asphalt can be made.

4.2 Users are cautioned that the recovered binder properties from an asphalt mixture sample may not exactly represent the properties of the original asphalt binder due to factors outside of laboratory control such as aging, contamination, and molecular changes caused by exposure to heat and solvents. Consequently, recovered asphalt binder properties should not be used as a basis for acceptance.

Note 1—The quality of the results produced by this is dependent on the competence of the personnel performing the procedure and the capability, calibration, and maintenance of the equipment used. Agencies that meet the criteria of Specification D3666 are generally considered capable of competent and objective testing, sampling, inspection, and so forth. Users of this practice are cautioned that compliance with Specification D3666 alone does not completely assure reliable results. Reliable results depend on many factors; following the suggestions of Specification D3666 or some similar acceptable guideline provides a means of evaluating and controlling some of those factors.

1.1 This practice is intended to be used to recover asphalt from a solvent using the rotary evaporator to ensure that changes in the asphalt properties during the recovery process are minimized.

1.2 Units—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.

ASTM D7906-14 Referenced Document

• ASTM D2172/D2172M Standard Test Methods for Quantitative Extraction of Asphalt Binder from Asphalt Mixtures
• ASTM D3666 Standard Specification for Minimum Requirements for Agencies Testing and Inspecting Road and Paving Materials*， 2024-04-20 Update
• ASTM D92 Standard Test Method for Flash and Fire Points by Cleveland Open Cup

ASTM D7906-14 history

• 2022 ASTM D7906-22 Standard Practice for Recovery of Asphalt Binder from Solution Using Toluene and the Rotary Evaporator
• 2014 ASTM D7906-14 Standard Practice for Recovery of Asphalt from Solution Using Toluene and the Rotary Evaporator