Standard Test Method for Ash Content of Asphalt Binder and Emulsified Asphalt Residues

Abstract

4.1 This test is used for determining the amount of inorganic or non-organic materials in an asphalt binder or emulsified asphalt residue. The emulsified asphalt residue can be obtained by methods such as Test Methods D6934 and D6997, Practice D7497, AASHTO R 78, or other agency-specified methods. This test may be useful as an alternative to solubility tests when a confounding material creates an interference to the solubility test being performed acceptably. An example of an interfering material is a polymer which may be incompatible with the solubility test solvent and plug the filter. Note 1: The quality of the results produced by this standard are 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, etc. Users of this standard are cautioned that compliance with Specification D3666 alone does not completely ensure 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.