Process for preparing emulsified dense-grated bituminous...

Details Process for preparing emulsified dense-grated bituminous... Process for preparing emulsified dense-grated bituminous...

C - Chemistry, Metallurgy

08

L

6/165

C08L 95/00 (2006.01) E01C 19/10 (2006.01)

Patent

CA 2243437

The coating is prepared using an emulsion that is a mixture of a rapid setting emulsion and a slow setting emulsion. An emulsion of soft asphalt is useful for a rapid emulsion and an emulsion of hard asphalt for a slow emulsion. This emulsified asphalt is useful in the rapid formation of surface dressings and the production of paving materials using coated aggregates. The resulting aggregates are easily handled and tend to become increasingly bonded after being laid and subjected to the high shear strength of a roller.

On procède à l'enrobage à l'aide d'une émulsion qui est constituée par le mélange d'une émulsion à rupture rapide et d'une émulsion à rupture lente. Il est avantageux de prendre pour émulsion rapide une émulsion de bitume mou, et pour émulsion lente une émulsion de bitume dur. Cette émulsion bitumineuse permet la formation rapide de mosaïque dans le cadre de revêtements superficiels et la fabrication de matériaux routiers par enrobage de granulats. Les granulats obtenus sont maniables et aptes à développer leur cohésion lors de la mise en place sous l'effet de cisaillement puissant d'un compacteur.

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