Extraction and recovery of binders from bituminous mixtures prepared with polymer-modified bitumens

This four-year project (July 2006 – June 2010) was funded by the Belgian Bureau for Standardization (NBN). Its objective was:

  • to improve the procedures for the extraction (with a continuous flux centrifuge) and recovery (with a rotary evaporator) of binders from bituminous mixtures prepared with polymer-modified bitumens (PmBs) (EN 12967-1 and -3);
  • to study and improve the procedure for the determination of binder content by ignition (EN 12697-39).

The following aspects were investigated in this project:

  • the effect of extraction on the determination of the binder content of bituminous mixtures prepared with PmBs (SBS, EVA);
  • the effect of extraction and recovery on the technological properties and physicochemical characteristics of PmBs (SBS, EVA);
  • ignition method for the determination of binder content: determination of the calibration factor for asphalt mixtures with PmBs, comparison with the solvent extraction method.

The results obtained made it possible to suggest improvements during the five-yearly revision of the three relevant standards.

Publications

Piérard N., Vanelstraete A.
Extraction et récupération des bitumes modifiés aux polymères (SBS, EVA) contenus dans les enrobés bitumineux sur base des normes d’essais EN 12697-1 et -3,
XXIe Congrès belge de la Route, ABR/AWV, Gand, 22-25 septembre 2009, Thème I “Revêtements bitumineux”, paper I.1.10, 10 p.

Piérard N., Vansteenkiste S., Vanelstraete A.
Effect of extraction and recovery procedure on the determination of PmB content and on the properties of the recovered binder, Road Materials and Pavement Design,
Vol. 11, Special Issue on Asphalt Technology EATA 2010, Paris, 2010, pp. 251‑279.

Destrée A., Piérard N., Vanelstraete A.
Détermination de la teneur en liant des enrobés bitumineux par la méthode de calcination à technologie infrarouge,
XXIIe Congrès belge de la Route, Liège, 11-13 septembre 2013, paper 07-0 Méthode de calcination-A Destrée, 10 p.

Destrée A., Piérard N.
Détermination de la teneur en liant des enrobés bitumineux par calcination: une méthode écologique et rapide,
Bulletin CRR 78, janvier-février-mars 2009, pp. 22-23

Piérard N.
Quid de l’extraction et de la récupération des liants modifiés au polymère d’enrobés bitumineux? Les procédures classiques sont-elles toujours applicables?,
Bulletin CRR 88, juillet-août-septembre 2011, pp. 12-6