Antifreeze protection of roads

Details Antifreeze protection of roads Antifreeze protection of roads

C - Chemistry, Metallurgy

08

L

6/60, 403/9

C08L 95/00 (2006.01) C09K 3/18 (2006.01)

Patent

CA 1142699

ABSTRACT OF THE DISCLOSURE An antifreeze admixture for the surface layer of a road, comprising: a first and primary component thereof, being a granular, inorganic material, grains thereof being porous, in which the pore volume is at least 30 degrees, the pores containing a first antifreeze substance; a second and secondary component, being a granular, organic material, the grains thereof also being porous and having a pore volume in excess of 30 degrees, the pores containing a second antifreeze substance; at least one of the components being made hydrophobic through the addition of a silicon- organic compound; and the grains of said first and second component being embedded in a bituminous, or asphalt, binder. The grains being protected against frost by the antifreeze substance which is usually NaC? and CaC?2 salts.

353783

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