Universite Laval, Cite Universitaire

Universit&eacute; Laval

Abdellatif Ait-Kadi

Mosto Bousmina

Ali Akbar Yousefi

Process for making multiphase polymeric film having a lamellar structure with controlled permeability and/or controlled mechanical properties

A paving composition comprises a mixture of about 90 to 99.5 wt. % of an asphaltic material and about 0.5 to 10 wt. % of solid particles each encapsulated with a cross-linked polymer, the encapsulated particles being uniformly dispersed in the asphaltic material. The encapsulated particles have a particle-to-polymer weight ratio so as to provide a density match between the encapsulated particles and the asphaltic material. The paving composition according to the invention has a higher complex viscosity at high temperatures (60&deg; C.) and is more ductile at low temperatures (&minus;15&deg; C.) in comparison with the base asphaltic material. Moreover, the composition is completely stable at elevated temperatures (160&deg; C.) or during long periods of storage.

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