| 摘要 |
<p>A paving composition formed of aggregate and asphalt cement in which the asphalt cement is treated with a combination of a primary catalyst comprising a compound chosen from the group consisting of asphalt cement soluble organic-manganese, organic-cobalt, and organic-copper compounds, or a mixture of two or more thereof, and a secondary catalyst comprising an asphalt cement soluble organic-iron compound.</p> |
