Stable paving compositions having improved low and high...

Details Stable paving compositions having improved low and high... Stable paving compositions having improved low and high...

E - Fixed Constructions

01

C

E01C 7/20 (2006.01)

Patent

CA 2313887

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°C) and is more ductile at low temperatures (-15°C) in comparison with the base asphaltic material. Moreover, the composition is completely stable at elevated temperatures (160°C) or during long periods of storage.

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