ASTM D7497-21 PDF Download

ASTM D7497-21 is a standard practice that outlines a method for recovering residue from emulsified asphalt using a low-temperature evaporative technique. The purpose of this practice is to obtain a residue from the emulsified asphalt that can be further tested using devices like a dynamic shear rheometer.

The procedure described in this standard is particularly useful when the temperatures used in other recovery techniques, such as those specified in Test Methods D6934 and D6997, would negatively affect the residue. By using lower evaporative temperatures, this practice provides conditions that closely resemble those during the application of these materials.

It is important to note that the quality of the results obtained from this standard depends on the competence of the personnel performing the procedure and the calibration and maintenance of the equipment used. Compliance with Specification D3666 is recommended, as it ensures competent and objective testing, sampling, and inspection. However, compliance with this specification alone does not guarantee reliable results, as many factors contribute to the accuracy of the testing process.