| 摘要 |
<p>Granular asphalt compositions contain bitumen in an amount from about 45 % to about 80 % by wt. and crystalline and/or rigid polymer in an amount from about 15 % to about 50 % by wt., which composition has been stabilized or incorporated into the bitumen with synthetic rubber in an amount from about 3 % to about 25 % by wt. The bitumen used in the compositions may have a wide penetration range from soft to hard base and is the major component of the composition up to about 80 % by wt. The resulting compositions can be granulated and the granules stored over a considerable length of time without sticking together. The granules may be readily and rapidly dispersed in bitumen to dilute the polymer content while the polymer remains stably displaced in the bitumen. The granules are useful in varied applications, such as in paving, roofing and other construction industries, and may be transported to sites for ready use thereat.</p> |
