Process for preparing bitumen compositions

Details Process for preparing bitumen compositions Process for preparing bitumen compositions

C - Chemistry, Metallurgy

08

L

C08L 95/00 (2006.01)

Patent

CA 2252453

The present invention provides a process for preparing a bitumen composition which comprises mixing at an elevated temperature an oxidised bitumen having a penetration index of at least 0 with a thermoplastic rubber which is present in an amount of less than 5 wt.%, based on total bitumen composition; bitumen compositions obtainable by such process; and the use of such bitumen compositions in asphalt mixtures for road applications.

Cette invention concerne un procédé de préparation d'une compositin de bitume. Le procédé consiste à mélanger à une température élevée un bitume oxydé ayant un indice de pénétration au moins égal à 0 avec un caoutchouc thermoplastique présent suivant une quantité inférieure à 5 % en poids sur la base de la composition de bitume totale. Cette invention concerne également des compositions de bitume pouvant être obtenues au moyen de ce procédé ainsi que l'utilisation de ces compositions de bitume dans des mélanges d'asphalte destinés à des applications routières.

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