The rapid determination of tar and bitumen in road materials

✍ Scribed by Green, E. H. ;Cox, E. A.

• Publisher: Wiley (John Wiley & Sons)
• Year: 1946
• Weight: 613 KB
• Volume: 65
• Category: Article
• ISSN: 0368-4075
• DOI: 10.1002/jctb.5000650101

✦ Synopsis

Abstract

A method is described for the determination of the binder content of bituminous mixtures, rapid enough for plant control and sufficiently accurate for routine analysis. The soluble binder is extracted from the mixture with methylene chloride; from an aliquot portion of the solution the solvent is removed by distillation under reduced pressure, and the binder weighed. The time required for the estimation of binder content varies from 30 to 90 minutes, according to the type of mix. Analysis of over one hundred representative bituminous road materials has shown excellent agreement with figures obtained by British standard methods. A brief review of standard methods is given with the times required for analysis.