ASTM D6998-19 PDF Download

ASTM D6998-19 is a standard practice that evaluates aggregate coating using emulsified asphalts. The purpose of this practice is to ensure that a specific grade of emulsified asphalt is stable and capable of effectively mixing with a specific reference stone. It aims to achieve uniform and thorough coating of the aggregate within the prescribed time.

It is important to note that the quality of the results obtained from this standard depends on the competence of the personnel conducting the procedure, as well as the capability, calibration, and maintenance of the equipment utilized. The standard also specifies that compliance with Specification D3666 alone is not sufficient to guarantee reliable results. Other factors also play a role in obtaining accurate and consistent outcomes. The suggestions outlined in Specification D3666 or a similar acceptable guideline can aid in evaluating and controlling some of these factors.

This practice specifically applies to emulsified asphalts intended for use by mixing with aggregate, and it does not cover rapid-setting types or diluted materials used for tack coats, priming, or mulch treatments. The standard also highlights that the notes and footnotes provided within the text are for explanatory purposes and should not be considered as requirements of the standard.