| 摘要 |
<p>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 siliconorganic 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.</p> |
