Application of a Rapid Test Method for Asphalt Content

摘要

Modifications have been developed for a rapid asphalt content test method that allow it to be applied to (1) mixtures made with hot, emulsified asphalts, (2) recycled (RAP) materials, and (3) mixtures containing a large proportion of fine, < no. 200 sieve, material. For mixtures with emulsified asphalts, a modified solvent, greater agitation and a different calibration curve are required. Recycled mixtures require a centrifugation step to clarify the extract and a different calibration curve. Mixtures with large proportions of fines also need a centrifugation step but the original calibration curve will suffice. The method was found to give erroneous results when highly absorptive, small pored coarse aggregates were used.