Formulation and method for producing rubber vehicular impact...

E - Fixed Constructions – 01 – F

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E01F 15/02 (2006.01) C08K 3/04 (2006.01) C08K 5/053 (2006.01) C08K 7/02 (2006.01) C08L 17/00 (2006.01) C08L 75/08 (2006.01) E01F 15/08 (2006.01)

Patent

CA 2179145

A formulation and a method are disclosed for on-site casting of rubber vehicular impact barriers, such as continuous, permanent highway median barriers. The formulation of the present invention, which preferably comprises 55-75% by weight rubber crumb, 5-12% by weight polyurethane prepolymer, 10-15% by weight polyol or glycol cross-linking agent, 10-20% by weight filler and 3-8% by weight fibrous material may be mixed and molded on-site by conventional mixing and molding equipment and produces a barrier having properties which allow it to be substituted for conventional concrete impact barriers.

Formule et méthode pour couler sur place des barrières d'impact en caoutchouc pour véhicules, tels les séparateurs centraux permanents sur les autoroutes. La formule de la présente invention comprend de préférence 55-75 % en poids de miettes de caoutchouc, 5-12 % en poids de prépolymère de polyuréthane, 10-15 % en poids d'agent réticulant au polyol ou au glycol, 10-20 % en poids d'une matière de charge et 3-8 % en poids d'une matière fibreuse qui peuvent être mélangés et moulés sur place au moyen de matériel conventionnel pour obtenir une barrière ayant les propriétés voulues pour remplacer les barrières d'impact traditionnelles en béton.

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