ASPHALT BINDER CONTENT DETERMINATION
This Instructional Memorandum covers the procedures used by the contracting authority to determine: (1). The quantity of asphalt binder incorporated in a project, and (2) the asphalt binder content of individual production runs of asphalt mixtures. Measure asphalt binder with a calibrated in-line flow meter. The plant inspector is referred to the applicable specifications and instructions for the specified tolerances and measurement frequencies.
Perform yield checks using either Tank Stick or by comparing the quantity of material delivered with the quantity used. Yield checks shall be performed a minimum of once per week unless otherwise required by the Engineer. See Appendix A for measurement by tank stick.
Each asphalt binder storage tank shall be identified by a number or letter and listed on the form. If a separate working tank or surge tank is provided, it will be necessary to establish a uniform procedure for determining the quantity or level or material in the tank. It is recommended that the plant inspector arrange with the contractor to maintain a uniform storage level in the surge tank.