ASTM D823 is a standard test method titled "Standard Practice for Making and Using Two-Part Epoxy and Polyurethane Adhesive Binders" and also "Standard Practice for Mixing and Using Two-Part Epoxy Adhesives". Here is a guide regarding ASTM D823:
Here's a useful piece of information:
This guide covers the preparation and use of two-part epoxy and polyurethane adhesive binders for bonding various materials, including metals, woods, and plastics. The standard focuses on the mixing and application of these adhesives to ensure optimal bonding performance. astm d823 pdf